Article
Optics
Aleksandra Petkovic, Zoran Ristivojevic
Summary: We study the induced interaction between two impurities in a weakly interacting one-dimensional Bose gas. The analytical results we derive show that the form of the interaction changes as the coupling is increased, approaching a linear function of the separation at short distances in the regime of strong coupling. Quantum fluctuations play an important role at long distances, resulting in a long-ranged quantum contribution to the induced interaction.
Article
Physics, Multidisciplinary
Dries Sels, Anatoli Polkovnikov
Summary: We investigate the crossover from ergodic to nonergodic behavior in an interacting spin chain with sparse impurity density. By studying the relaxation and delocalization of these impurities, we find that they always exchange energy with the rest of the chain, leading to weakly dependent relaxation rates and exponential decay with field strength. This relaxation is connected to operator spreading and hinders the construction of local integrals of motion. In the high field limit, the impurities appear localized, but eventual delocalization occurs due to a flowing localization length.
Article
Physics, Multidisciplinary
Yao Wang, Zhuoyu Chen, Tao Shi, Brian Moritz, Zhi-Xu Shen, Thomas P. Devereaux
Summary: This study establishes a minimal model for cuprates and highlights the crucial contribution of long-range electron-phonon coupling beyond standard Hubbard models. The research findings suggest a strong attractive interaction between neighboring electrons, comparable to experimental observations, due to nonlocal couplings mediating neighboring interactions. The structural and chemical similarities between 1D and 2D cuprate materials provide important insights for understanding cuprate high-Tc superconductivity and related quantum phases.
PHYSICAL REVIEW LETTERS
(2021)
Article
Quantum Science & Technology
Yi-Ping Wang, He Wang
Summary: We propose a theoretical method to study the topological properties of spin-phonon coupled modes in a one-dimensional superconducting resonator lattice. Different topological structures can be displayed by adjusting the coupling parameters, and the topological index of the system's phases can be distinguished.
QUANTUM INFORMATION PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Yi-Ping Wang, Wei Wang, Lang Liu, Zhi-Yong Zheng, Meng -En Du
Summary: We theoretically study the topological properties in a one-dimensional superconducting circuit lattice and analyze the energy spectrum and edge states. The number of lattices affects the topological characteristics and the inversion of the edge state distribution can be realized. Considering the effects of defects, dissipation, and disorder, we find that they impact the system but the edge state remains stable due to topological protection.
RESULTS IN PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Ephraim Bernhardt, Fan Yang, Karyn Le Hur
Summary: We investigated the superfluid response and localization dynamics induced by static and mobile impurities under strong coupling and strong disorder conditions, as well as the many-body localization phenomenon associated with the ladder model.
Article
Multidisciplinary Sciences
Ta Tang, Brian Moritz, Cheng Peng, Zhi-Xun Shen, Thomas P. Devereaux
Summary: This study demonstrates that extended electron-phonon coupling is a significant factor in generating the attractive coupling observed in one-dimensional cuprate materials, and can reproduce the spectral features and doping dependence seen in experiments.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Multidisciplinary
Liu Teng, Lu Peng-Fei, Hu Bi-Ying, Wu Hao, Lao Qi-Feng, Bian Ji, Liu Yang, Zhu Feng, Luo Le
Summary: This article discusses the implementation of high-fidelity multi-ion entangled states and quantum gates. It introduces the Molmer-Sorensen gate and the design of ultrafast laser pulse sequences. The spin states between ions are coupled by driving either the phonon energy level or the motional state of the ion chain. Modulated laser pulses or appropriately designed pulse sequences are applied to improve the fidelity of quantum gates.
ACTA PHYSICA SINICA
(2022)
Article
Physics, Multidisciplinary
Milosz Panfil, Sarang Gopalakrishnan, Robert M. Konik
Summary: Many experimentally relevant systems are quasi-one-dimensional, consisting of nearly decoupled chains, where weak interchain couplings play a crucial role in thermalizing the system. We developed a Boltzmann-equation formalism involving a collision integral that is asymptotically exact for any interacting integrable system, and applied it to study relaxation in coupled Bose gases in the Newton's cradle setup. We found that relaxation involves a broad spectrum of timescales and the Markov process governing relaxation at late times is gapless, leading to nonexponential approach to equilibrium even for spatially uniform perturbations.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
G. A. R. van Dalum, C. Ortix, L. Fritz
Summary: In this paper, a one-dimensional insulator with approximate chiral symmetry belonging to the AIII class was constructed by intentionally polluting the edge of a two-dimensional quantum spin Hall insulator with magnetic impurities. The resulting bound states hybridize and disperse along the edge, with discussions on the existence of zero-dimensional boundary modes. The construction is independent of impurity lattice details, and the stability of zero modes against disorder and random lattice configurations was confirmed numerically in a microscopic model.
Review
Physics, Condensed Matter
S. L. Prischepa, V. N. Kushnir
Summary: This article discusses various aspects of phonon spectrum changes in nanostructured phonon-mediated superconductors. With the development of experimental techniques and the acquisition of new results, the understanding of the influence of surface and nanoscale on the electron-phonon interaction and critical temperature T (c) has changed and deepened. The article is divided into ten parts, discussing superconductivity theory, properties of nanostructured thin films, phonon spectrum modifications, and light excitation of superconducting materials, among others.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Chemistry, Multidisciplinary
Jose D. Mella, Hernan L. Calvo, Luis E. F. Foa Torres
Summary: This report discusses the effects of electron-phonon interaction in materials, particularly in graphene. It shows that this interaction can lead to the formation of a gap bridged by unique edge states, with a distinctive locking among propagation direction, valley, and phonon mode. These findings shed light on how to utilize these unconventional states in quantum research.
Article
Materials Science, Multidisciplinary
Yaser Abdi, Ali Mazaheri, Soheil Hajibaba, Sara Darbari, Seyed Javad Rezvani, Andrea Di Cicco, Francesco Paparoni, Reza Rahighi, Somayeh Gholipour, Alimorad Rashidi, Mahdi Malekshahi Byranvand, Michael Saliba
Summary: This study introduces a new two-dimensional borophene-based supercapacitor that is produced using a chemical vapor deposition method. The results show that this supercapacitor has a high specific capacity and outperforms previous boron-based supercapacitors as well as other two-dimensional materials in terms of electrochemical performance.
ACS MATERIALS LETTERS
(2022)
Article
Physics, Multidisciplinary
Giulia De Rosi, Riccardo Rota, Grigori E. Astrakharchik, Jordi Boronat
Summary: We report an intriguing anomaly in the temperature dependence of the specific heat of a one-dimensional Bose gas. This anomaly resembles a superfluid-to-normal phase transition observed in higher dimensions, despite phase transitions not being allowed in one dimension. The anomaly can be attributed to unpopulated states that act as an energy gap located below the hole branch in the excitation spectrum. Furthermore, thermal fluctuations at temperatures near the anomaly threshold can become comparable to the maximum hole energy, leading to a qualitative change in the excitation structure.
Article
Physics, Multidisciplinary
Sihan Feng, Weicheng Fu, Yong Zhang, Hong Zhao
Summary: This paper studies the relaxation properties of phonons in 1D lattices and finds that asymmetric interparticle interactions lead to larger damping rates of phonons, which follow a power-law relation at low temperatures. This provides insights into understanding anomalous heat conduction in 1D chains and ultra-low phonon heat conduction in certain solids.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2022)