article published yes Tibor Dome author 7e3293e2-b9dc-11ee-97a9-cd73400f69940000-0003-2586-3702 Artem Volosniev author 37D278BC-F248-11E8-B48F-1D18A9856A870000-0003-0393-5525 Areg Ghazaryan author 4AF46FD6-F248-11E8-B48F-1D18A9856A870000-0001-9666-3543 Laleh Safari author 3C325E5E-F248-11E8-B48F-1D18A9856A87 Richard Schmidt author Mikhail Lemeshko author 37CB05FA-F248-11E8-B48F-1D18A9856A870000-0002-6990-7802 MiLe department Angulon: physics and applications of a new quasiparticle project ISTplus - Postdoctoral Fellowships project We study a linear rotor in a bosonic bath within the angulon formalism. Our focus is on systems where isotropic or anisotropic impurity-boson interactions support a shallow bound state. To study the fate of the angulon in the vicinity of bound-state formation, we formulate a beyond-linear-coupling angulon Hamiltonian. First, we use it to study attractive, spherically symmetric impurity-boson interactions for which the linear rotor can be mapped onto a static impurity. The well-known polaron formalism provides an adequate description in this limit. Second, we consider anisotropic potentials, and show that the presence of a shallow bound state with pronounced anisotropic character leads to a many-body instability that washes out the angulon dynamics. American Physical Society2024 eng 2469-9950 2469-9969 2308.03852 00117275450000210.1103/PhysRevB.109.014102 1091 Dome, T., Volosniev, A., Ghazaryan, A., Safari, L., Schmidt, R., &#38; Lemeshko, M. (2024). Linear rotor in an ideal Bose gas near the threshold for binding. <i>Physical Review B</i>. American Physical Society. <a href="https://doi.org/10.1103/PhysRevB.109.014102">https://doi.org/10.1103/PhysRevB.109.014102</a> T. Dome, A. Volosniev, A. Ghazaryan, L. Safari, R. Schmidt, M. Lemeshko, Physical Review B 109 (2024). T. Dome, A. Volosniev, A. Ghazaryan, L. Safari, R. Schmidt, and M. Lemeshko, “Linear rotor in an ideal Bose gas near the threshold for binding,” <i>Physical Review B</i>, vol. 109, no. 1. American Physical Society, 2024. Dome, Tibor, Artem Volosniev, Areg Ghazaryan, Laleh Safari, Richard Schmidt, and Mikhail Lemeshko. “Linear Rotor in an Ideal Bose Gas near the Threshold for Binding.” <i>Physical Review B</i>. American Physical Society, 2024. <a href="https://doi.org/10.1103/PhysRevB.109.014102">https://doi.org/10.1103/PhysRevB.109.014102</a>. Dome, Tibor, et al. “Linear Rotor in an Ideal Bose Gas near the Threshold for Binding.” <i>Physical Review B</i>, vol. 109, no. 1, 014102, American Physical Society, 2024, doi:<a href="https://doi.org/10.1103/PhysRevB.109.014102">10.1103/PhysRevB.109.014102</a>. Dome T, Volosniev A, Ghazaryan A, Safari L, Schmidt R, Lemeshko M. 2024. Linear rotor in an ideal Bose gas near the threshold for binding. Physical Review B. 109(1), 014102. Dome T, Volosniev A, Ghazaryan A, Safari L, Schmidt R, Lemeshko M. Linear rotor in an ideal Bose gas near the threshold for binding. <i>Physical Review B</i>. 2024;109(1). doi:<a href="https://doi.org/10.1103/PhysRevB.109.014102">10.1103/PhysRevB.109.014102</a> 148452024-01-21T23:00:57Z2025-09-04T11:49:14Z