@article{15224,
  abstract     = {When a star exhausts its nuclear fuel, it either explodes as a supernova or more quiescently becomes a white dwarf, an object about half the mass of our Sun with a radius of about that of the Earth. About one-fifth of white dwarfs exhibit the presence of magnetic fields, whose origin has long been debated as either the product of previous stages of evolution or of binary interactions. We here report the discovery of two massive and magnetic white-dwarf members of young star clusters in the Gaia second data release (DR2) database, while a third massive and magnetic cluster white dwarf was already reported in a previous paper. These stars are most likely the product of single-star evolution and therefore challenge the merger scenario as the only way to produce magnetic white dwarfs. The progenitor masses of these stars are all above 5 solar masses, and there are only two other cluster white dwarfs whose distances have been unambiguously measured with Gaia and whose progenitors' masses fall in this range. This high incidence of magnetic white dwarfs indicates that intermediate-mass progenitors are more likely to produce magnetic remnants and that a fraction of magnetic white dwarfs forms from intermediate-mass stars.},
  author       = {Caiazzo, Ilaria and Heyl, Jeremy and Richer, Harvey and Cummings, Jeffrey and Fleury, Leesa and Hegarty, James and Kalirai, Jason and Kerr, Ronan and Thiele, Sarah and Tremblay, Pier-Emmanuel and Villanueva, Michael},
  issn         = {2041-8213},
  journal      = {The Astrophysical Journal Letters},
  keywords     = {Space and Planetary Science, Astronomy and Astrophysics},
  number       = {1},
  publisher    = {American Astronomical Society},
  title        = {{Intermediate-mass stars become magnetic white dwarfs}},
  doi          = {10.3847/2041-8213/abb5f7},
  volume       = {901},
  year         = {2020},
}

@inproceedings{15228,
  abstract     = {We describe a new implementation of a broad-band soft X-ray polarimeter, substantially based on a previous design. This implementation, the Pioneer Soft X-ray Polarimeter (PiSoX) is a SmallSat, designed for NASA’s call for Astrophysics Pioneers, small missions that could be CubeSats, balloon experiments, or SmallSats. As in REDSoX, the grating arrangement is designed optimally for the purpose of polarimetry with broad-band focussing optics by matching the dispersion of the spectrometer channels to laterally graded multilayers (LGMLs). The system can achieve polarization modulation factors over 90%. For PiSoX, the optics are lightweight Si mirrors in a one-bounce parabolic configuration. High efficiency, blazed gratings from opposite sectors are oriented to disperse to a LGML forming a channel covering the wavelength range from 35 Å to 75 Å (165 - 350 eV). Upon satellite rotation, the intensities of the dispersed spectra, after reflection and polarizing by the LGMLs, give the three Stokes parameters needed to determine a source’s linear polarization fraction and orientation. The design can be extended to higher energies as LGMLs are developed further. We describe examples of the potential scientific return from instruments based on this design.},
  author       = {Marshall, Herman L. and Heine, Sarah and Garner, Alan and Gullikson, Eric and Guenther, Moritz and Leitz, Christopher and Masterson, Rebecca and Miller, Eric and Zhang, William and Boissay Malaquin, Rozenn and Caiazzo, Ilaria and Chakrabarty, Deepto and Davidson, Rosemary and Gallo, Luigi and Heilmann, Ralf K. and Heyl, Jeremy and Kara, Erin and Marscher, Alan and Schulz, Norbert},
  booktitle    = {Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray},
  isbn         = {978-151063675-0},
  issn         = {1996-756X},
  location     = {Virtual},
  publisher    = {SPIE},
  title        = {{A small satellite version of a soft x-ray polarimeter}},
  doi          = {10.1117/12.2562811},
  volume       = {11444},
  year         = {2020},
}

@inproceedings{15229,
  abstract     = {We propose a high-time-resolution, high-spectral-resolution X-ray telescope that uses transition-edge sensors (TES) as detectors and collector optics to direct the X-rays onto the focal plane, providing a large effective area in a small satellite. The key science driver of the instrument is to study neutron stars and accreting black holes. The proposed instrument is built upon two technologies that are already at high TRL: TES X-ray detectors and collector optics.},
  author       = {Heyl, Jeremy and Caiazzo, Ilaria and Gallagher, Sarah and Hoffman, Kelsey and Safi-Harb, Samar},
  booktitle    = {Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray},
  isbn         = {978-151063675-0},
  issn         = {1996-756X},
  location     = {Virtual},
  publisher    = {SPIE},
  title        = {{The Colibrì high-resolution x-ray telescope}},
  doi          = {10.1117/12.2562625},
  volume       = {11444},
  year         = {2020},
}

@article{15286,
  author       = {Fäßler, Florian and Dimchev, Georgi A and Hodirnau, Victor-Valentin and Zens, Bettina and Möhl, Christoph and Bradke, Frank and Schur, Florian KM},
  issn         = {1435-8115},
  journal      = {Microscopy and Microanalysis},
  keywords     = {Instrumentation},
  number       = {S2},
  pages        = {2518--2519},
  publisher    = {Oxford University Press},
  title        = {{Cryo-electron tomography workflows for quantitative analysis of actin networks involved in cell migration}},
  doi          = {10.1017/s1431927620021881},
  volume       = {26},
  year         = {2020},
}

@inproceedings{10556,
  abstract     = {In this paper, we present the first Asynchronous Distributed Key Generation (ADKG) algorithm which is also the first distributed key generation algorithm that can generate cryptographic keys with a dual (f,2f+1)-threshold (where f is the number of faulty parties). As a result, using our ADKG we remove the trusted setup assumption that the most scalable consensus algorithms make. In order to create a DKG with a dual (f,2f+1)- threshold we first answer in the affirmative the open question posed by Cachin et al. [7] on how to create an Asynchronous Verifiable Secret Sharing (AVSS) protocol with a reconstruction threshold of f+1<k łe 2f+1, which is of independent interest. Our High-threshold-AVSS (HAVSS) uses an asymmetric bivariate polynomial to encode the secret. This enables the reconstruction of the secret only if a set of k nodes contribute while allowing an honest node that did not participate in the sharing phase to recover his share with the help of f+1 honest parties. Once we have HAVSS we can use it to bootstrap scalable partially synchronous consensus protocols, but the question on how to get a DKG in asynchrony remains as we need a way to produce common randomness. The solution comes from a novel Eventually Perfect Common Coin (EPCC) abstraction that enables the generation of a common coin from n concurrent HAVSS invocations. EPCC's key property is that it is eventually reliable, as it might fail to agree at most f times (even if invoked a polynomial number of times). Using EPCC we implement an Eventually Efficient Asynchronous Binary Agreement (EEABA) which is optimal when the EPCC agrees and protects safety when EPCC fails. Finally, using EEABA we construct the first ADKG which has the same overhead and expected runtime as the best partially-synchronous DKG (O(n4) words, O(f) rounds). As a corollary of our ADKG, we can also create the first Validated Asynchronous Byzantine Agreement (VABA) that does not need a trusted dealer to setup threshold signatures of degree n-f. Our VABA has an overhead of expected O(n2) words and O(1) time per instance, after an initial O(n4) words and O(f) time bootstrap via ADKG.},
  author       = {Kokoris Kogias, Eleftherios and Malkhi, Dahlia and Spiegelman, Alexander},
  booktitle    = {Proceedings of the 2020 ACM SIGSAC Conference on Computer and Communications Security},
  isbn         = {978-1-4503-7089-9},
  location     = {Virtual, United States},
  pages        = {1751–1767},
  publisher    = {Association for Computing Machinery},
  title        = {{Asynchronous distributed key generation for computationally-secure randomness, consensus, and threshold signatures}},
  doi          = {10.1145/3372297.3423364},
  year         = {2020},
}

@misc{10557,
  abstract     = {Data storage and retrieval systems, methods, and computer-readable media utilize a cryptographically verifiable data structure that facilitates verification of a transaction in a decentralized peer-to-peer environment using multi-hop backwards and forwards links. Backward links are cryptographic hashes of past records. Forward links are cryptographic signatures of future records that are added retroactively to records once the target block has been appended to the data structure.},
  author       = {Ford, Bryan and Gasse, Linus and Kokoris Kogias, Eleftherios and Jovanovic, Philipp},
  title        = {{Cryptographically verifiable data structure having multi-hop forward and backwards links and associated systems and methods}},
  year         = {2020},
}

@article{10618,
  abstract     = {Magnetism typically arises from the joint effect of Fermi statistics and repulsive Coulomb interactions, which favours ground states with non-zero electron spin. As a result, controlling spin magnetism with electric fields—a longstanding technological goal in spintronics and multiferroics1,2—can be achieved only indirectly. Here we experimentally demonstrate direct electric-field control of magnetic states in an orbital Chern insulator3,4,5,6, a magnetic system in which non-trivial band topology favours long-range order of orbital angular momentum but the spins are thought to remain disordered7,8,9,10,11,12,13,14. We use van der Waals heterostructures consisting of a graphene monolayer rotationally faulted with respect to a Bernal-stacked bilayer to realize narrow and topologically non-trivial valley-projected moiré minibands15,16,17. At fillings of one and three electrons per moiré unit cell within these bands, we observe quantized anomalous Hall effects18 with transverse resistance approximately equal to h/2e2 (where h is Planck’s constant and e is the charge on the electron), which is indicative of spontaneous polarization of the system into a single-valley-projected band with a Chern number equal to two. At a filling of three electrons per moiré unit cell, we find that the sign of the quantum anomalous Hall effect can be reversed via field-effect control of the chemical potential; moreover, this transition is hysteretic, which we use to demonstrate non-volatile electric-field-induced reversal of the magnetic state. A theoretical analysis19 indicates that the effect arises from the topological edge states, which drive a change in sign of the magnetization and thus a reversal in the favoured magnetic state. Voltage control of magnetic states can be used to electrically pattern non-volatile magnetic-domain structures hosting chiral edge states, with applications ranging from reconfigurable microwave circuit elements to ultralow-power magnetic memories.},
  author       = {Polshyn, Hryhoriy and Zhu, J. and Kumar, M. A. and Zhang, Y. and Yang, F. and Tschirhart, C. L. and Serlin, M. and Watanabe, K. and Taniguchi, T. and MacDonald, A. H. and Young, A. F.},
  issn         = {1476-4687},
  journal      = {Nature},
  keywords     = {multidisciplinary},
  number       = {7836},
  pages        = {66--70},
  publisher    = {Springer Nature},
  title        = {{Electrical switching of magnetic order in an orbital Chern insulator}},
  doi          = {10.1038/s41586-020-2963-8},
  volume       = {588},
  year         = {2020},
}

@unpublished{10650,
  abstract     = {The understanding of material systems with strong electron-electron interactions is the central problem in modern condensed matter physics. Despite this, the essential physics of many of these materials is still not understood and we have no overall perspective on their properties. Moreover, we have very little ability to make predictions in this class of systems. In this manuscript we share our personal views of what the major open problems are in correlated electron systems and we discuss some possible routes to make progress in this rich and fascinating field. This manuscript is the result of the vigorous discussions and deliberations that took place at Johns Hopkins University during a three-day workshop January 27, 28, and 29, 2020 that brought together six senior scientists and 46 more junior scientists. Our hope, is that the topics we have presented will provide inspiration for others working in this field and motivation for the idea that significant progress can be made on very hard problems if we focus our collective energies.},
  author       = {Alexandradinata, A and Armitage, N.P. and Baydin, Andrey and Bi, Wenli and Cao, Yue and Changlani, Hitesh J. and Chertkov, Eli and da Silva Neto, Eduardo H. and Delacretaz, Luca and El Baggari, Ismail and Ferguson, G.M. and Gannon, William J. and Ghorashi, Sayed Ali Akbar and Goodge, Berit H. and Goulko, Olga and Grissonnache, G. and Hallas, Alannah and Hayes, Ian M. and He, Yu and Huang, Edwin W. and Kogar, Anshu and Kumah, Divine and Lee, Jong Yeon and Legros, A. and Mahmood, Fahad and Maximenko, Yulia and Pellatz, Nick and Polshyn, Hryhoriy and Sarkar, Tarapada and Scheie, Allen and Seyler, Kyle L. and Shi, Zhenzhong and Skinner, Brian and Steinke, Lucia and Thirunavukkuarasu, K. and Trevisan, Thaís Victa and Vogl, Michael and Volkov, Pavel A. and Wang, Yao and Wang, Yishu and Wei, Di and Wei, Kaya and Yang, Shuolong and Zhang, Xian and Zhang, Ya-Hui and Zhao, Liuyan and Zong, Alfred},
  booktitle    = {arXiv},
  pages        = {55},
  title        = {{The future of the correlated electron problem}},
  year         = {2020},
}

@inproceedings{10672,
  abstract     = {The family of feedback alignment (FA) algorithms aims to provide a more biologically motivated alternative to backpropagation (BP), by substituting the computations that are unrealistic to be implemented in physical brains. While FA algorithms have been shown to work well in practice, there is a lack of rigorous theory proofing their learning capabilities. Here we introduce the first feedback alignment algorithm with provable learning guarantees. In contrast to existing work, we do not require any assumption about the size or depth of the network except that it has a single output neuron, i.e., such as for binary classification tasks. We show that our FA algorithm can deliver its theoretical promises in practice, surpassing the learning performance of existing FA methods and matching backpropagation in binary classification tasks. Finally, we demonstrate the limits of our FA variant when the number of output neurons grows beyond a certain quantity.},
  author       = {Lechner, Mathias},
  booktitle    = {8th International Conference on Learning Representations},
  location     = {Virtual ; Addis Ababa, Ethiopia},
  publisher    = {ICLR},
  title        = {{Learning representations for binary-classification without backpropagation}},
  year         = {2020},
}

@inproceedings{10673,
  abstract     = {We propose a neural information processing system obtained by re-purposing the function of a biological neural circuit model to govern simulated and real-world control tasks. Inspired by the structure of the nervous system of the soil-worm, C. elegans, we introduce ordinary neural circuits (ONCs), defined as the model of biological neural circuits reparameterized for the control of alternative tasks. We first demonstrate that ONCs realize networks with higher maximum flow compared to arbitrary wired networks. We then learn instances of ONCs to control a series of robotic tasks, including the autonomous parking of a real-world rover robot. For reconfiguration of the purpose of the neural circuit, we adopt a search-based optimization algorithm. Ordinary neural circuits perform on par and, in some cases, significantly surpass the performance of contemporary deep learning models. ONC networks are compact, 77% sparser than their counterpart neural controllers, and their neural dynamics are fully interpretable at the cell-level.},
  author       = {Hasani, Ramin and Lechner, Mathias and Amini, Alexander and Rus, Daniela and Grosu, Radu},
  booktitle    = {Proceedings of the 37th International Conference on Machine Learning},
  issn         = {2640-3498},
  location     = {Virtual},
  pages        = {4082--4093},
  title        = {{A natural lottery ticket winner: Reinforcement learning with ordinary neural circuits}},
  year         = {2020},
}

@inproceedings{10693,
  abstract     = {High quality graphene heterostructures host an array of fractional quantum Hall isospin ferromagnets with diverse spin and valley orders. While a variety of phase transitions have been observed, disentangling the isospin phase diagram of these states is hampered by the absence of direct probes of spin and valley order. I will describe nonlocal transport measurements based on launching spin waves from a gate defined lateral heterojunction, performed in ultra-clean Corbino geometry graphene devices. At high magnetic fields, we find that the spin-wave transport signal is detected in all FQH states between ν = 0 and 1; however, between ν = 1 and 2 only odd numerator FQH states show finite nonlocal transport, despite the identical ground state spin polarizations in odd- and even numerator states. The results reveal that the neutral spin-waves are both spin and sublattice polarized making them a sensitive probe of ground state sublattice structure. Armed with this understanding, we use nonlocal transport signal to a magnetic field tuned isospin phase transition, showing that the emergent even denominator state at ν = 1/2 in monolayer graphene is indeed a multicomponent state featuring equal populations on each sublattice.},
  author       = {Zhou, Haoxin and Polshyn, Hryhoriy and Tanaguchi, Takashi and Watanabe, Kenji and Young, Andrea},
  booktitle    = {APS March Meeting 2020},
  issn         = {0003-0503},
  location     = {Denver, CO, United States},
  number       = {1},
  publisher    = {American Physical Society},
  title        = {{Sublattice resolved spin wave transport through graphene fractional quantum Hall states as a probe of isospin order}},
  volume       = {65},
  year         = {2020},
}

@inproceedings{10696,
  abstract     = {We experimentally investigate twisted van der Waals heterostructures of monolayer graphene rotated with respect to a bernal stacked graphene bilayer. We report transport measurements for devices with twist angles between 0.9 and 1.4°. The electric field allows efficient tuning of the width, isolation and the topology of the moiré bands in this system. By comparing magnetoresistance measurements to numerical simulations, we develop an understanding of the band structure. Finally, we observe correlated states at half- and quarter-fillings, which arise when narrow moire sublattice band is isolated by energy gaps from dispersive bands. We investigate the effects of in-plane and out-of-plane magnetic field on these states and discuss the implication for their spin- and valley- polarization.},
  author       = {Polshyn, Hryhoriy and Zhu, Jihang and Kumar, Manish and Taniguchi, Takashi and Watanabe, Kenji and MacDonald, Allan and Young, Andrea},
  booktitle    = {APS March Meeting 2020},
  issn         = {0003-0503},
  location     = {Denver, CO, United States},
  number       = {1},
  publisher    = {American Physical Society},
  title        = {{Correlated states and tunable topological bands in twisted monolayer-bilayer graphene heterostructures}},
  volume       = {65},
  year         = {2020},
}

@inproceedings{10697,
  abstract     = {We report the observation of a quantized anomalous Hall effect in a moiré heterostructure consisting of twisted bilayer graphene aligned to an encapsulating hBN substrate. The effect occurs at a density of 3 electrons per superlattice unit cell, where we observe magnetic hysteresis and a Hall resistance quantized to within 0.1% of the resistance quantum at temperatures as high as 3K. In this first of 3 talks, I will describe the fabrication procedure for our device as well as basic transport characterization measurements. I will introduce the phenomenology of twisted bilayer graphene and present evidence for hBN alignment as manifested in the hierarchy of symmetry-breaking gaps and anomalous magnetoresistance.},
  author       = {Zhang, Yuxuan and Serlin, Marec and Tschirhart, Charles and Polshyn, Hryhoriy and Zhu, Jiacheng and Balents, Leon and Huber, Martin E. and Taniguchi, Takashi and Watanabe, Kenji and Young, Andrea},
  booktitle    = {APS March Meeting 2020},
  location     = {Denver, CO, United States},
  number       = {1},
  publisher    = {American Physical Society},
  title        = {{Intrinsic quantized anomalous Hall effect in a moiré heterostructure, part I: Device fabrication and transport}},
  volume       = {65},
  year         = {2020},
}

@inproceedings{10698,
  abstract     = {This is the second of three talks describing the observation and characterization of a ferromagnetic moiré heterostructure based on twisted bilayer graphene aligned to hexagonal boron nitride. I will compare the qualitative and quantitative features of this observed quantum anomalous Hall state to traditional systems engineered from thin film (Bi,Sb)2Te3 topological insulators. In particular, we find that the measured electronic energy gap of ~30K is several times higher than the Curie temperature, consistent with a lack of disorder associated with magnetic dopants. In this system, the quantization arises from spontaneous ferromagnetic polarization into a single spin and valley moiré subband, which is topological despite the lack of spin orbit coupling. I will also discuss the observation of current induced switching, which allows the magnetic state of the heterostructure to be controllably reversed with currents as small as a few nanoamperes.},
  author       = {Serlin, Marec and Tschirhart, Charles and Polshyn, Hryhoriy and Zhang, Yuxuan and Zhu, Jiacheng and Huber, Martin E. and Balents, Leon and Watanabe, Kenji and Tanaguchi, Takashi and Young, Andrea},
  booktitle    = {APS March Meeting 2020},
  location     = {Denver, CO, United States},
  number       = {1},
  publisher    = {American Physical Society},
  title        = {{Intrinsic quantized anomalous Hall effect in a moiré heterostructure, part II: Temperature dependence and current switching}},
  volume       = {65},
  year         = {2020},
}

@inproceedings{10699,
  abstract     = {This is the third of three talks describing the observation and characterization of a ferromagnetic moiré heterostructure based on twisted bilayer graphene aligned to hexagonal boron nitride. In this segment I will present scanning probe magnetometry data acquired using a nanoSQUID-on-tip microscope, which provides ~150 nm spatial resolution and a field sensitivity of ~10 nT/rtHz. We study the distribution of magnetic domains within the device as a function of density, magnetic field training, and DC current. Our data allow us to constrain the magnitude of the orbital magnetic moment of the electrons in the QAH state. Comparison with simultaneously acquired transport data allows us to precisely correlate single domain dynamics with discrete jumps in the observed anomalous Hall signal.},
  author       = {Tschirhart, Charles and Serlin, Marec and Polshyn, Hryhoriy and Zhang, Yuxuan and Zhu, Jiacheng and Balents, Leon and Huber, Martin E. and Watanabe, Kenji and Tanaguchi, Takashi and Young, Andrea},
  booktitle    = {APS March Meeting 2020},
  issn         = {0003-0503},
  location     = {Denver, CO, United States},
  number       = {1},
  publisher    = {American Physical Society},
  title        = {{Intrinsic quantized anomalous Hall effect in a moiré heterostructure, part III: Scanning probe magnetometry}},
  volume       = {65},
  year         = {2020},
}

@article{10701,
  abstract     = {Partially filled Landau levels host competing electronic orders. For example, electron solids may prevail close to integer filling of the Landau levels before giving way to fractional quantum Hall liquids at higher carrier density1,2. Here, we report the observation of an electron solid with non-collinear spin texture in monolayer graphene, consistent with solidification of skyrmions3—topological spin textures characterized by quantized electrical charge4,5. We probe the spin texture of the solids using a modified Corbino geometry that allows ferromagnetic magnons to be launched and detected6,7. We find that magnon transport is highly efficient when one Landau level is filled (ν=1), consistent with quantum Hall ferromagnetic spin polarization. However, even minimal doping immediately quenches the magnon signal while leaving the vanishing low-temperature charge conductivity unchanged. Our results can be understood by the formation of a solid of charged skyrmions near ν=1, whose non-collinear spin texture leads to rapid magnon decay. Data near fractional fillings show evidence of several fractional skyrmion solids, suggesting that graphene hosts a highly tunable landscape of coupled spin and charge orders.},
  author       = {Zhou, Haoxin and Polshyn, Hryhoriy and Taniguchi, Takashi and Watanabe, Kenji and Young, Andrea F.},
  issn         = {1745-2481},
  journal      = {Nature Physics},
  number       = {2},
  pages        = {154--158},
  publisher    = {Springer Nature},
  title        = {{Skyrmion solids in monolayer graphene}},
  doi          = {10.1038/s41567-019-0729-8},
  volume       = {16},
  year         = {2020},
}

@article{10861,
  abstract     = {We introduce in this paper AMT2.0, a tool for qualitative and quantitative analysis of hybrid continuous and Boolean signals that combine numerical values and discrete events. The evaluation of the signals is based on rich temporal specifications expressed in extended signal temporal logic, which integrates timed regular expressions within signal temporal logic. The tool features qualitative monitoring (property satisfaction checking), trace diagnostics for explaining and justifying property violations and specification-driven measurement of quantitative features of the signal. We demonstrate the tool functionality on several running examples and case studies, and evaluate its performance.},
  author       = {Nickovic, Dejan and Lebeltel, Olivier and Maler, Oded and Ferrere, Thomas and Ulus, Dogan},
  issn         = {1433-2787},
  journal      = {International Journal on Software Tools for Technology Transfer},
  keywords     = {Information Systems, Software},
  number       = {6},
  pages        = {741--758},
  publisher    = {Springer Nature},
  title        = {{AMT 2.0: Qualitative and quantitative trace analysis with extended signal temporal logic}},
  doi          = {10.1007/s10009-020-00582-z},
  volume       = {22},
  year         = {2020},
}

@article{10862,
  abstract     = {We consider the sum of two large Hermitian matrices A and B with a Haar unitary conjugation bringing them into a general relative position. We prove that the eigenvalue density on the scale slightly above the local eigenvalue spacing is asymptotically given by the free additive convolution of the laws of A and B as the dimension of the matrix increases. This implies optimal rigidity of the eigenvalues and optimal rate of convergence in Voiculescu's theorem. Our previous works [4], [5] established these results in the bulk spectrum, the current paper completely settles the problem at the spectral edges provided they have the typical square-root behavior. The key element of our proof is to compensate the deterioration of the stability of the subordination equations by sharp error estimates that properly account for the local density near the edge. Our results also hold if the Haar unitary matrix is replaced by the Haar orthogonal matrix.},
  author       = {Bao, Zhigang and Erdös, László and Schnelli, Kevin},
  issn         = {0022-1236},
  journal      = {Journal of Functional Analysis},
  keywords     = {Analysis},
  number       = {7},
  publisher    = {Elsevier},
  title        = {{Spectral rigidity for addition of random matrices at the regular edge}},
  doi          = {10.1016/j.jfa.2020.108639},
  volume       = {279},
  year         = {2020},
}

@inbook{10865,
  abstract     = {We introduce the notion of Witness Maps as a cryptographic notion of a proof system. A Unique Witness Map (UWM) deterministically maps all witnesses for an   NP  statement to a single representative witness, resulting in a computationally sound, deterministic-prover, non-interactive witness independent proof system. A relaxation of UWM, called Compact Witness Map (CWM), maps all the witnesses to a small number of witnesses, resulting in a “lossy” deterministic-prover, non-interactive proof-system. We also define a Dual Mode Witness Map (DMWM) which adds an “extractable” mode to a CWM.
Our main construction is a DMWM for all   NP  relations, assuming sub-exponentially secure indistinguishability obfuscation (  iO ), along with standard cryptographic assumptions. The DMWM construction relies on a CWM and a new primitive called Cumulative All-Lossy-But-One Trapdoor Functions (C-ALBO-TDF), both of which are in turn instantiated based on   iO  and other primitives. Our instantiation of a CWM is in fact a UWM; in turn, we show that a UWM implies Witness Encryption. Along the way to constructing UWM and C-ALBO-TDF, we also construct, from standard assumptions, Puncturable Digital Signatures and a new primitive called Cumulative Lossy Trapdoor Functions (C-LTDF). The former improves up on a construction of Bellare et al. (Eurocrypt 2016), who relied on sub-exponentially secure   iO  and sub-exponentially secure OWF.
As an application of our constructions, we show how to use a DMWM to construct the first leakage and tamper-resilient signatures with a deterministic signer, thereby solving a decade old open problem posed by Katz and Vaikunthanathan (Asiacrypt 2009), by Boyle, Segev and Wichs (Eurocrypt 2011), as well as by Faonio and Venturi (Asiacrypt 2016). Our construction achieves the optimal leakage rate of   1−o(1) .},
  author       = {Chakraborty, Suvradip and Prabhakaran, Manoj and Wichs, Daniel},
  booktitle    = {Public-Key Cryptography},
  editor       = {Kiayias, A},
  isbn         = {9783030453732},
  issn         = {1611-3349},
  pages        = {220--246},
  publisher    = {Springer Nature},
  title        = {{Witness maps and applications}},
  doi          = {10.1007/978-3-030-45374-9_8},
  volume       = {12110},
  year         = {2020},
}

@article{10866,
  abstract     = {Recent discoveries have shown that, when two layers of van der Waals (vdW) materials are superimposed with a relative twist angle between them, the electronic properties of the coupled system can be dramatically altered. Here, we demonstrate that a similar concept can be extended to the optics realm, particularly to propagating phonon polaritons–hybrid light-matter interactions. To do this, we fabricate stacks composed of two twisted slabs of a vdW crystal (α-MoO3) supporting anisotropic phonon polaritons (PhPs), and image the propagation of the latter when launched by localized sources. Our images reveal that, under a critical angle, the PhPs isofrequency curve undergoes a topological transition, in which the propagation of PhPs is strongly guided (canalization regime) along predetermined directions without geometric spreading. These results demonstrate a new degree of freedom (twist angle) for controlling the propagation of polaritons at the nanoscale with potential for nanoimaging, (bio)-sensing, or heat management.},
  author       = {Duan, Jiahua and Capote-Robayna, Nathaniel and Taboada-Gutiérrez, Javier and Álvarez-Pérez, Gonzalo and Prieto Gonzalez, Ivan and Martín-Sánchez, Javier and Nikitin, Alexey Y. and Alonso-González, Pablo},
  issn         = {1530-6992},
  journal      = {Nano Letters},
  keywords     = {Mechanical Engineering, Condensed Matter Physics, General Materials Science, General Chemistry, Bioengineering},
  number       = {7},
  pages        = {5323--5329},
  publisher    = {American Chemical Society},
  title        = {{Twisted nano-optics: Manipulating light at the nanoscale with twisted phonon polaritonic slabs}},
  doi          = {10.1021/acs.nanolett.0c01673},
  volume       = {20},
  year         = {2020},
}