@article{22262,
  abstract     = {Mixed modes are observed in many low-mass evolved stars. They provide information about core rotation rates of these stars, which are lower than predicted by stellar evolution models. The mixed modes themselves have been invoked as an angular momentum (AM) transport mechanism, but estimating their transport efficiency requires knowledge of their amplitudes. We constrain, for the first time, the mixed-mode amplitudes in 2D hydrodynamical simulations of a 1.3M⊙ red giant using the code MUSIC. We perform two simulations with outer radial truncations at fractional radii ro/r⋆ = 0.90 and 0.98. We compare the modes in the simulation with those found using both GYRE and a Dedalus eigenvalue solver. Excellent frequency agreement is found for all p-dominated modes, with minor discrepancies for g-dominated modes, especially in the frequency range [60, 240] μHz. We find excellent eigenfunction agreement for all modes except those in this frequency range. According to empirical predictions, the largest kinetic energies are located around Vmax= 312.μHz, but in both simulations, the modes with frequencies of ν < 50 μHz have the largest kinetic energies. In the simulation with r/r⋆ = 0.98, the simulated modes have extrapolated surface velocities comparable to the empirical predictions, with the highest surface velocities in a bell-shaped curve peaking around ν = 700 μHz. The extrapolated surface velocities of the low-frequency modes are small and thus hard to observe, but their large kinetic energies deeper in the interior could significantly impact AM transport, which has not yet been investigated.},
  author       = {De Vries, Nils B. and Le Saux, Arthur and Baraffe, Isabelle and Guillet, Thomas and Townsend, Richard H.D. and Leclerc, Armand and Morison, Adrien},
  issn         = {1538-4357},
  journal      = {The Astrophysical Journal},
  keywords     = {Stellar physics, Stellar interiors, Asteroseismology, Stellar oscillations, Hydrodynamical simulations},
  number       = {2},
  publisher    = {IOP Publishing},
  title        = {{Revealing mixed modes in compressible hydrodynamical simulations of red giant stars}},
  doi          = {10.3847/1538-4357/ae7a3c},
  volume       = {1005},
  year         = {2026},
}

@phdthesis{22873,
  author       = {Ehrmann, Andreas},
  isbn         = {978-3-99078-092-3},
  issn         = {2663-337X},
  keywords     = {PhD Thesis, functional nanomachines, biological functionality, nanotechnology, energy delivery, target behavior, dynamics, design principles, optimization, differentiable statistical physics, machine learning},
  pages        = {168},
  publisher    = {Institute of Science and Technology Austria},
  title        = {{Biological functionality without biochemistry: Designing nanomachines for target behavior}},
  doi          = {10.15479/AT-ISTA-22873},
  year         = {2026},
}

@phdthesis{23033,
  author       = {Stöllner, Andrea},
  issn         = {2663-337X},
  keywords     = {aerosol physics, electrostatics, optics, optical tweezers, atmospheric electricity},
  pages        = {88},
  publisher    = {Institute of Science and Technology Austria},
  title        = {{Microscale electrical behavior of highly charged individual aerosol particles using optical tweezers}},
  doi          = {10.15479/AT-ISTA-23033},
  year         = {2026},
}

@misc{19623,
  abstract     = {Persistent revivals recently observed in Rydberg atom simulators have challenged our understanding of thermalization and attracted much interest to the concept of quantum many-body scars (QMBSs). QMBSs are non-thermal highly excited eigenstates that coexist with typical eigenstates in the spectrum of many-body Hamiltonians, and have since been reported in multiple theoretical models, including the so-called PXP model, approximately realized by Rydberg simulators. At the same time, questions of how common QMBSs are and in what models they are physically realized remain open. In this Letter, we demonstrate that QMBSs exist in a broader family of models that includes and generalizes PXP to longer-range constraints and states with different periodicity. We show that in each model, multiple QMBS families can be found. Each of them relies on a different approximate 𝔰𝔲⁡(2) algebra, leading to oscillatory dynamics in all cases. However, in contrast to the PXP model, their observation requires launching dynamics from weakly entangled initial states rather than from a product state. QMBSs reported here may be experimentally probed using Rydberg atom simulator in the regime of longer-range Rydberg blockades.},
  author       = {Desaules, Jean-Yves Marc},
  keywords     = {quantum many-body scars, non-equilibrium physics, Rydberg atoms},
  publisher    = {Institute of Science and Technology Austria},
  title        = {{Research Data for "Quantum Many-Body Scars beyond the PXP Model in Rydberg Simulators"}},
  doi          = {10.15479/AT:ISTA:19623},
  year         = {2025},
}

@phdthesis{19853,
  abstract     = {The internal dynamical properties of red giant stars have been explored extensively in recent
years as a result of the increase in high precision data availability from the space missions
Kepler and TESS (Transiting Exoplanet Survey Satellite), and in this exploration, it has been
discovered that some of these stars are not behaving as expected. Red giants are stars that have
evolved off of the main sequence after having completed fusing hydrogen into helium in their
core. Observational data shows that the cores are rotating significantly slower than models can
recreate consistently across evolutionary stages. This discrepancy has prompted investigation
into the efficiency of angular momentum transport mechanisms and mixing processes including
meridional circulation, shear instability, internal gravity waves, Tayler-Spruit dynamo, fossil
magnetic fields etc., to explain this behavior.
Analyzing seismic oscillations in stars, via asteroseismology, is a powerful tool as it is the only
way in which the deep stellar interior can be probed and subsequently characterized; this is
possible as global oscillations modulating the stellar surface are effected by internal processes.
For red giants, p-modes (pressure modes; resonating through the entire star) and g-modes
(gravity-modes; resonating in the radiative interior) couple to create mixed modes. These
mixed modes give access to the otherwise hidden stellar interior as g-modes couple to p-modes,
delivering information from the interior to the surface.
Internal magnetic signatures have been observationally confirmed in red giant stars via
asteroseismology and characterized in two ways. One being that dipole mixed modes with
ℓ = 1 will display a global asymmetric frequency shift of its azimuthal components; where
the m = 0 and m = ±1 components of the ℓ = 1 dipole mode will be shifted by two
different power laws, respectively. And the other being a reduced visibility of dipole mixed
mode amplitudes in the power spectra, where stars presenting with this feature are denoted as
suppressed.
Several studies of the suppressed dipole mixed mode amplitudes have been carried out, but thus
far, no dedicated studies of the asymmetric frequency shifts of suppressed red giants have been
conducted; one reason being that the asymmetric frequency shifts cannot be characterized
when the dipole mixed mode amplitudes are severely reduced in many of the suppressed stars.
Sincefullysuppressedstarsdonothavedetectablemixed-modestoevaluate, partiallysuppressed
stars, that is, red giant stars presenting with suppressed dipole mixed modes in select parts of
their power spectra rather than across the entire spectra, will be the subject of this study as
the respective mode amplitudes are still visible at high frequencies.
As such, this study will search for asymmetric frequency shifts on the dipole mixed
modes of partially suppressed red giant stars; the aim here is to investigate if both
mode suppression and magnetic shifting of dipole mixed modes occur simultaneously.
Thisstudywillbeconductedbycreatingapipelinetoestimatepriorsofasteroseismicparameters,
use the priors to model the power spectra with the stellar modeling code sloscillations_ISTA,
and perform a Bayesian fit of the parameters with the simulated data on the star KIC 6975038,
a target with partially suppressed dipolar mode amplitudes identified in the literature, to fit its
magnetic parameters. I present a novel method to model the stellar power spectra of
partially suppressed red giants by application of a sigmoid profile to the ℓ= 1 dipolar
mode component of the spectra. With the results of this study I aim at constraining
the cause of this partial dipole mode amplitude suppression, allowing for more detailed
studies regarding their astrophysical nature. Furthermore, the long term hope for the method
used in this study will be to expand the sample of partially suppressed red giants and fit their
asteroseismic parameters accordingly.},
  author       = {Smith, Kanah},
  issn         = {2791-4585},
  keywords     = {asteroseismology, stellar physics, red giant, magnetism, suppressed},
  pages        = {38},
  publisher    = {Institute of Science and Technology Austria},
  title        = {{Exploring internal magnetism in partially suppressed red giant stars}},
  doi          = {10.15479/AT-ISTA-19853},
  year         = {2025},
}

@unpublished{22340,
  abstract     = {We show that Laplace isospectral deformations within a conformal class of generic Liouville metrics on the two-dimensional torus that are linear in the deformation parameter are necessarily trivial. Two of the main ingredients in our proof are a noncancellation result for the wave trace and an analysis of the second order variational formula for the energy functional associated to closed geodesics. Noncancellation allows us to detect parts of the length spectrum from the Laplace spectrum and conclude rational integrability for the deformed geodesic flow (Liouville metrics are folklorically conjectured to be the only Riemannian metrics with integrable geodesic flow on the torus). We then use the second variational formula to show how the preservation of a single rational torus is sufficient to conclude triviality of the deformation, assuming linearity. We also present some evidence that our hypothesis of linearity may indeed be necessary.},
  author       = {Henheik, Sven Joscha and Kaloshin, Vadim and Li, Yunzhe and Vig, Amir},
  booktitle    = {arXiv},
  keywords     = {Differential Geometry (math.DG), Mathematical Physics (math-ph), Dynamical Systems (math.DS), Spectral Theory (math.SP), FOS: Mathematics, FOS: Mathematics, FOS: Physical sciences, FOS: Physical sciences, 58J42, 37J35, 37J35, 35P20, 58J40, 58J50, 37D40},
  title        = {{Spectral rigidity of Liouville tori}},
  doi          = {10.48550/ARXIV.2511.10398},
  year         = {2025},
}

@phdthesis{19533,
  abstract     = {This thesis explores advancements in quantum remote sensing and non-equilibrium phase
transitions in the microwave regime, with a focus on dissipative phase transitions and quantumenhanced sensing.
In the first project, I experimentally studied photon blockade breakdown as a dissipative phase
transition in a zero-dimensional cavity-qubit system. By defining an appropriate thermodynamic
limit, we demonstrated that the observed bistability is a genuine signature of a first-order
phase transition in this system. This work provides insight into non-equilibrium quantum
dynamics and phase transitions in driven-dissipative open quantum systems.
The second project focuses on the experimental realization of a phase-conjugate receiver for
quantum illumination (QI), a quantum sensing protocol that enhances target detection in noisy
environments using entangled light. While an ideal spontaneous parametric down-conversion
(SPDC) source and receiver could, in theory, provide up to a 6 dB advantage over classical
illumination, no such ideal receiver exists. Instead, we explore an experimental realization of a
phase-conjugate receiver for QI in the microwave regime at millikelvin temperatures using a
Josephson parametric converter (JPC) as a source of continuous-variable Gaussian entangled
signal-idler pairs, where a maximum 3 dB advantage is theoretically achievable. We investigate
key experimental limitations that constrain practical QI performance, contributing to the
development of quantum-enhanced sensing.
Additionally, this thesis presents efficient digital signal processing (DSP) techniques implemented in C++ and Python in collaboration with Przemysław Zieliński and Luka Drmić. These
methods, optimized using the Intel Integrated Performance Primitives (IPP) library, have been
essential in data acquisition, noise filtering, and correlation analysis across multiple research
projects. Although not real-time, these DSP techniques significantly enhance the accuracy of
quantum measurements.
Overall, this thesis advances quantum-enhanced sensing by establishing the thermodynamic
limit in a single transmon-cavity system and experimentally exploring a phase-conjugate receiver
for QI. These findings contribute to quantum metrology, particularly for weak signal detection
and remote sensing in noisy environments.
},
  author       = {Sett, Riya},
  issn         = {2663-337X},
  keywords     = {phase transition, open quantum system, phase diagram, cavity quantum electrodynamics, superconducting qubits, semiclassical physics, quantum optics, josephson junction, parametric converter, phase conjugation, quantum radar, quantum entanglement, correlation, quantum sensing},
  pages        = {109},
  publisher    = {Institute of Science and Technology Austria},
  title        = {{Quantum remote sensing and non-equilibrium phase transitions in the microwave regime}},
  doi          = {10.15479/AT-ISTA-19533},
  year         = {2025},
}

@article{14802,
  abstract     = {Frequency-stable lasers form the back bone of precision measurements in science and technology. Such lasers typically attain their stability through frequency locking to reference cavities. State-of-the-art locking performances to date had been achieved using frequency modulation based methods, complemented with active drift cancellation systems. We demonstrate an all passive, modulation-free laser-cavity locking technique (squash locking) that utilizes changes in spatial beam ellipticity for error signal generation, and a coherent polarization post-selection for noise resilience. By comparing two identically built proof-of-principle systems, we show a frequency locking instability of 5×10<jats:sup>−7</jats:sup> relative to the cavity linewidth at 10 s averaging. The results surpass the demonstrated performances of methods engineered over the last five decades, potentially enabling an advancement in the precision control of lasers, while creating avenues for bridging the performance gaps between industrial grade lasers with scientific ones due to the afforded simplicity and scalability.},
  author       = {Diorico, Fritz R and Zhutov, Artem and Hosten, Onur},
  issn         = {2334-2536},
  journal      = {Optica},
  keywords     = {Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials},
  number       = {1},
  pages        = {26--31},
  publisher    = {Optica Publishing Group},
  title        = {{Laser-cavity locking utilizing beam ellipticity: accessing the 10<sup>−7</sup> instability scale relative to cavity linewidth}},
  doi          = {10.1364/optica.507451},
  volume       = {11},
  year         = {2024},
}

@article{15018,
  abstract     = {The epitaxial growth of a strained Ge layer, which is a promising candidate for the channel material of a hole spin qubit, has been demonstrated on 300 mm Si wafers using commercially available Si0.3Ge0.7 strain relaxed buffer (SRB) layers. The assessment of the layer and the interface qualities for a buried strained Ge layer embedded in Si0.3Ge0.7 layers is reported. The XRD reciprocal space mapping confirmed that the reduction of the growth temperature enables the 2-dimensional growth of the Ge layer fully strained with respect to the Si0.3Ge0.7. Nevertheless, dislocations at the top and/or bottom interface of the Ge layer were observed by means of electron channeling contrast imaging, suggesting the importance of the careful dislocation assessment. The interface abruptness does not depend on the selection of the precursor gases, but it is strongly influenced by the growth temperature which affects the coverage of the surface H-passivation. The mobility of 2.7 × 105 cm2/Vs is promising, while the low percolation density of 3 × 1010 /cm2 measured with a Hall-bar device at 7 K illustrates the high quality of the heterostructure thanks to the high Si0.3Ge0.7 SRB quality.},
  author       = {Shimura, Yosuke and Godfrin, Clement and Hikavyy, Andriy and Li, Roy and Aguilera Servin, Juan L and Katsaros, Georgios and Favia, Paola and Han, Han and Wan, Danny and de Greve, Kristiaan and Loo, Roger},
  issn         = {1369-8001},
  journal      = {Materials Science in Semiconductor Processing},
  keywords     = {Mechanical Engineering, Mechanics of Materials, Condensed Matter Physics, General Materials Science},
  number       = {5},
  publisher    = {Elsevier},
  title        = {{Compressively strained epitaxial Ge layers for quantum computing applications}},
  doi          = {10.1016/j.mssp.2024.108231},
  volume       = {174},
  year         = {2024},
}

@misc{17471,
  abstract     = {Mechanisms for suppressing thermalization in disorder-free many-body systems, such as Hilbert space fragmentation and quantum many-body scars, have recently attracted much interest in foundations of quantum statistical physics and potential quantum information processing applications. However,  their sensitivity to realistic effects such as finite temperature remains largely unexplored. Here, we have utilized IBM's Kolkata quantum processor to demonstrate an unexpected robustness of quantum many-body scars at finite temperatures when the system is prepared in a thermal Gibbs ensemble. We identify such robustness in the PXP model, which describes quantum many-body scars in experimental systems of Rydberg atom arrays and ultracold atoms in tilted Bose--Hubbard optical lattices. By contrast, other theoretical models which host exact quantum many-body scars are found to lack such robustness, and their scarring properties quickly decay with temperature. Our study sheds light on the important differences between scarred models in terms of their algebraic structures, which impacts their resilience to finite temperature.},
  author       = {Desaules, Jean-Yves Marc},
  keywords     = {quantum many-body scars, non-equilibrium physics, non-Hermitian physics},
  publisher    = {Institute of Science and Technology Austria},
  title        = {{Data for "Enhanced many-body quantum scars from the non-Hermitian Fock skin effect"}},
  doi          = {10.15479/AT:ISTA:17471},
  year         = {2024},
}

@article{15053,
  abstract     = {Atom-based quantum simulators have had many successes in tackling challenging quantum many-body problems, owing to the precise and dynamical control that they provide over the systems' parameters. They are, however, often optimized to address a specific type of problem. Here, we present the design and implementation of a 6Li-based quantum gas platform that provides wide-ranging capabilities and is able to address a variety of quantum many-body problems. Our two-chamber architecture relies on a robust combination of gray molasses and optical transport from a laser-cooling chamber to a glass cell with excellent optical access. There, we first create unitary Fermi superfluids in a three-dimensional axially symmetric harmonic trap and characterize them using in situ thermometry, reaching temperatures below 20 nK. This allows us to enter the deep superfluid regime with samples of extreme diluteness, where the interparticle spacing is sufficiently large for direct single-atom imaging. Second, we generate optical lattice potentials with triangular and honeycomb geometry in which we study diffraction of molecular Bose-Einstein condensates, and show how going beyond the Kapitza-Dirac regime allows us to unambiguously distinguish between the two geometries. With the ability to probe quantum many-body physics in both discrete and continuous space, and its suitability for bulk and single-atom imaging, our setup represents an important step towards achieving a wide-scope quantum simulator.},
  author       = {Jin, Shuwei and Dai, Kunlun and Verstraten, Joris and Dixmerias, Maxime and Al Hyder, Ragheed and Salomon, Christophe and Peaudecerf, Bruno and de Jongh, Tim and Yefsah, Tarik},
  issn         = {2643-1564},
  journal      = {Physical Review Research},
  keywords     = {General Physics and Astronomy},
  number       = {1},
  publisher    = {American Physical Society},
  title        = {{Multipurpose platform for analog quantum simulation}},
  doi          = {10.1103/physrevresearch.6.013158},
  volume       = {6},
  year         = {2024},
}

@article{15045,
  abstract     = {Coupling of orbital motion to a spin degree of freedom gives rise to various transport phenomena in quantum systems that are beyond the standard paradigms of classical physics. Here, we discuss features of spin-orbit dynamics that can be visualized using a classical model with two coupled angular degrees of freedom. Specifically, we demonstrate classical ‘spin’ filtering through our model and show that the interplay between angular degrees of freedom and dissipation can lead to asymmetric ‘spin’ transport.},
  author       = {Varshney, Atul and Ghazaryan, Areg and Volosniev, Artem},
  issn         = {1432-5411},
  journal      = {Few-Body Systems},
  keywords     = {Atomic and Molecular Physics, and Optics},
  publisher    = {Springer Nature},
  title        = {{Classical ‘spin’ filtering with two degrees of freedom and dissipation}},
  doi          = {10.1007/s00601-024-01880-x},
  volume       = {65},
  year         = {2024},
}

@article{12113,
  abstract     = {The power factor of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) film can be significantly improved by optimizing the oxidation level of the film in oxidation and reduction processes. However, precise control over the oxidation and reduction effects in PEDOT:PSS remains a challenge, which greatly sacrifices both S and σ. Here, we propose a two-step post-treatment using a mixture of ethylene glycol (EG) and Arginine (Arg) and sulfuric acid (H2SO4) in sequence to engineer high-performance PEDOT:PSS thermoelectric films. The high-polarity EG dopant removes the excess non-ionized PSS and induces benzenoid-to-quinoid conformational change in the PEDOT:PSS films. In particular, basic amino acid Arg tunes the oxidation level of PEDOT:PSS and prevents the films from over-oxidation during H2SO4 post-treatment, leading to increased S. The following H2SO4 post-treatment further induces highly orientated lamellar stacking microstructures to increase σ, yielding a maximum power factor of 170.6 μW m−1 K−2 at 460 K. Moreover, a novel trigonal-shape thermoelectric device is designed and assembled by the as-prepared PEDOT:PSS films in order to harvest heat via a vertical temperature gradient. An output power density of 33 μW cm−2 is generated at a temperature difference of 40 K, showing the potential application for low-grade wearable electronic devices.},
  author       = {Zhang, Li and Liu, Xingyu and Wu, Ting and Xu, Shengduo and Suo, Guoquan and Ye, Xiaohui and Hou, Xiaojiang and Yang, Yanling and Liu, Qingfeng and Wang, Hongqiang},
  issn         = {0169-4332},
  journal      = {Applied Surface Science},
  keywords     = {Surfaces, Coatings and Films, Condensed Matter Physics, Surfaces and Interfaces, General Physics and Astronomy, General Chemistry},
  publisher    = {Elsevier},
  title        = {{Two-step post-treatment to deliver high performance thermoelectric device with vertical temperature gradient}},
  doi          = {10.1016/j.apsusc.2022.156101},
  volume       = {613},
  year         = {2023},
}

@article{12165,
  abstract     = {It may come as a surprise that a phenomenon as ubiquitous and prominent as the transition from laminar to turbulent flow has resisted combined efforts by physicists, engineers and mathematicians, and remained unresolved for almost one and a half centuries. In recent years, various studies have proposed analogies to directed percolation, a well-known universality class in statistical mechanics, which describes a non-equilibrium phase transition from a fluctuating active phase into an absorbing state. It is this unlikely relation between the multiscale, high-dimensional dynamics that signify the transition process in virtually all flows of practical relevance, and the arguably most basic non-equilibrium phase transition, that so far has mainly been the subject of model studies, which I review in this Perspective.},
  author       = {Hof, Björn},
  issn         = {2522-5820},
  journal      = {Nature Reviews Physics},
  keywords     = {General Physics and Astronomy},
  pages        = {62--72},
  publisher    = {Springer Nature},
  title        = {{Directed percolation and the transition to turbulence}},
  doi          = {10.1038/s42254-022-00539-y},
  volume       = {5},
  year         = {2023},
}

@article{12697,
  abstract     = {Models for same-material contact electrification in granular media often rely on a local charge-driving parameter whose spatial variations lead to a stochastic origin for charge exchange. Measuring the charge transfer from individual granular spheres after contacts with substrates of the same material, we find instead a “global” charging behavior, coherent over the sample’s whole surface. Cleaning and baking samples fully resets charging magnitude and direction, which indicates the underlying global parameter is not intrinsic to the material, but acquired from its history. Charging behavior is randomly and irreversibly affected by changes in relative humidity, hinting at a mechanism where adsorbates, in particular, water, are fundamental to the charge-transfer process.},
  author       = {Grosjean, Galien M and Waitukaitis, Scott R},
  issn         = {1079-7114},
  journal      = {Physical Review Letters},
  keywords     = {General Physics, Electrostatics, Triboelectricity, Soft Matter, Acoustic Levitation, Granular Materials},
  number       = {9},
  publisher    = {American Physical Society},
  title        = {{Single-collision statistics reveal a global mechanism driven by sample history for contact electrification in granular media}},
  doi          = {10.1103/physrevlett.130.098202},
  volume       = {130},
  year         = {2023},
}

@article{12723,
  abstract     = {Lead halide perovskites enjoy a number of remarkable optoelectronic properties. To explain their origin, it is necessary to study how electromagnetic fields interact with these systems. We address this problem here by studying two classical quantities: Faraday rotation and the complex refractive index in a paradigmatic perovskite CH3NH3PbBr3 in a broad wavelength range. We find that the minimal coupling of electromagnetic fields to the k⋅p Hamiltonian is insufficient to describe the observed data even on the qualitative level. To amend this, we demonstrate that there exists a relevant atomic-level coupling between electromagnetic fields and the spin degree of freedom. This spin-electric coupling allows for quantitative description of a number of previous as well as present experimental data. In particular, we use it here to show that the Faraday effect in lead halide perovskites is dominated by the Zeeman splitting of the energy levels and has a substantial beyond-Becquerel contribution. Finally, we present general symmetry-based phenomenological arguments that in the low-energy limit our effective model includes all basis coupling terms to the electromagnetic field in the linear order.},
  author       = {Volosniev, Artem and Shiva Kumar, Abhishek and Lorenc, Dusan and Ashourishokri, Younes and Zhumekenov, Ayan A. and Bakr, Osman M. and Lemeshko, Mikhail and Alpichshev, Zhanybek},
  issn         = {1079-7114},
  journal      = {Physical Review Letters},
  keywords     = {General Physics and Astronomy},
  number       = {10},
  publisher    = {American Physical Society},
  title        = {{Spin-electric coupling in lead halide perovskites}},
  doi          = {10.1103/physrevlett.130.106901},
  volume       = {130},
  year         = {2023},
}

@article{13197,
  abstract     = {Nominally identical materials exchange net electric charge during contact through a mechanism that is still debated. ‘Mosaic models’, in which surfaces are presumed to consist of a random patchwork of microscopic donor/acceptor sites, offer an appealing explanation for this phenomenon. However, recent experiments have shown that global differences persist even between same-material samples, which the standard mosaic framework does not account for. Here, we expand the mosaic framework by incorporating global differences in the densities of donor/acceptor sites. We develop
an analytical model, backed by numerical simulations, that smoothly connects the global and deterministic charge transfer of different materials to the local and stochastic mosaic picture normally associated with identical materials. Going further, we extend our model to explain the effect of contact asymmetries during sliding, providing a plausible explanation for reversal of charging sign that has been observed experimentally.},
  author       = {Grosjean, Galien M and Waitukaitis, Scott R},
  issn         = {2475-9953},
  journal      = {Physical Review Materials},
  keywords     = {Physics and Astronomy (miscellaneous), General Materials Science},
  number       = {6},
  publisher    = {American Physical Society},
  title        = {{Asymmetries in triboelectric charging: Generalizing mosaic models to different-material samples and sliding contacts}},
  doi          = {10.1103/physrevmaterials.7.065601},
  volume       = {7},
  year         = {2023},
}

@article{13277,
  abstract     = {Recent experimental advances have inspired the development of theoretical tools to describe the non-equilibrium dynamics of quantum systems. Among them an exact representation of quantum spin systems in terms of classical stochastic processes has been proposed. Here we provide first steps towards the extension of this stochastic approach to bosonic systems by considering the one-dimensional quantum quartic oscillator. We show how to exactly parameterize the time evolution of this prototypical model via the dynamics of a set of classical variables. We interpret these variables as stochastic processes, which allows us to propose a novel way to numerically simulate the time evolution of the system. We benchmark our findings by considering analytically solvable limits and providing alternative derivations of known results.},
  author       = {Tucci, Gennaro and De Nicola, Stefano and Wald, Sascha and Gambassi, Andrea},
  issn         = {2666-9366},
  journal      = {SciPost Physics Core},
  keywords     = {Statistical and Nonlinear Physics, Atomic and Molecular Physics, and Optics, Nuclear and High Energy Physics, Condensed Matter Physics},
  number       = {2},
  publisher    = {SciPost Foundation},
  title        = {{Stochastic representation of the quantum quartic oscillator}},
  doi          = {10.21468/scipostphyscore.6.2.029},
  volume       = {6},
  year         = {2023},
}

@article{13278,
  abstract     = {We present a numerical analysis of spin-1/2 fermions in a one-dimensional harmonic potential in the presence of a magnetic point-like impurity at the center of the trap. The model represents a few-body analogue of a magnetic impurity in the vicinity of an s-wave superconductor. Already for a few particles we find a ground-state level crossing between sectors with different fermion parities. We interpret this crossing as a few-body precursor of a quantum phase transition, which occurs when the impurity "breaks" a Cooper pair. This picture is further corroborated by analyzing density-density correlations in momentum space. Finally, we discuss how the system may be realized with existing cold-atoms platforms.},
  author       = {Rammelmüller, Lukas and Huber, David and Čufar, Matija and Brand, Joachim and Hammer, Hans-Werner and Volosniev, Artem},
  issn         = {2542-4653},
  journal      = {SciPost Physics},
  keywords     = {General Physics and Astronomy},
  number       = {1},
  publisher    = {SciPost Foundation},
  title        = {{Magnetic impurity in a one-dimensional few-fermion system}},
  doi          = {10.21468/scipostphys.14.1.006},
  volume       = {14},
  year         = {2023},
}

@article{13346,
  abstract     = {The self-assembly of nanoparticles driven by small molecules or ions may produce colloidal superlattices with features and properties reminiscent of those of metals or semiconductors. However, to what extent the properties of such supramolecular crystals actually resemble those of atomic materials often remains unclear. Here, we present coarse-grained molecular simulations explicitly demonstrating how a behavior evocative of that of semiconductors may emerge in a colloidal superlattice. As a case study, we focus on gold nanoparticles bearing positively charged groups that self-assemble into FCC crystals via mediation by citrate counterions. In silico ohmic experiments show how the dynamically diverse behavior of the ions in different superlattice domains allows the opening of conductive ionic gates above certain levels of applied electric fields. The observed binary conductive/nonconductive behavior is reminiscent of that of conventional semiconductors, while, at a supramolecular level, crossing the “band gap” requires a sufficient electrostatic stimulus to break the intermolecular interactions and make ions diffuse throughout the superlattice’s cavities.},
  author       = {Lionello, Chiara and Perego, Claudio and Gardin, Andrea and Klajn, Rafal and Pavan, Giovanni M.},
  issn         = {1936-086X},
  journal      = {ACS Nano},
  keywords     = {General Physics and Astronomy, General Engineering, General Materials Science},
  number       = {1},
  pages        = {275--287},
  publisher    = {American Chemical Society},
  title        = {{Supramolecular semiconductivity through emerging ionic gates in ion–nanoparticle superlattices}},
  doi          = {10.1021/acsnano.2c07558},
  volume       = {17},
  year         = {2023},
}