Article
Physics, Multidisciplinary
Stefano Scopa, Pasquale Calabrese, Jerome Dubail
Summary: In this study, we investigate the non-equilibrium dynamics of a one-dimensional spin-1/2 XXZ model at zero-temperature in the regime |Delta| < 1. We find that two domain walls in the initially prepared state with two domain walls exhibit independent evolution at early times, and only after a calculable time do they start to interact, resulting in the occurrence of a split Fermi sea. For Delta = 0, we derive exact asymptotic results for the magnetization and the spin current using a semi-classical Wigner function approach, and we accurately determine the spreading of entanglement entropy using quantum fluctuating hydrodynamics tools. In the interacting case, we analytically solve the Generalized Hydrodynamics equation, providing exact expressions for the conserved quantities. We also present numerical results for the entanglement entropy in the interacting case and propose a conjecture for its asymptotic value.
Article
Materials Science, Multidisciplinary
Yankang Liu, Yohei Fuji, Haruki Watanabe
Summary: In this work, Bloch oscillations in strongly interacting systems are revisited. By analyzing the spin-1/2 XXZ chain, it is shown that under certain anisotropy parameter values, the behavior of current density under a weak electric field limit is qualitatively similar to the noninteracting case, with the amplitude of oscillation suppressed by the system size factor when the parameter deviates from these values. The strength of the electric field required to observe such a behavior is estimated using the Landau-Zener formula.
Article
Chemistry, Physical
Duncan Bossion, Sutirtha N. Chowdhury, Pengfei Huo
Summary: The new NRPMD method, based on the spin mapping formalism, demonstrates numerical accuracy and advantages in computing nuclear position and population auto-correlation functions of non-adiabatic model systems. It provides efficient sampling of quantum statistics and nearly time-independent expectation values for physical observables.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Athanassios K. Boudalis, Jorge-Enrique Olivares-Pena, Eufemio Moreno-Pineda, Artem Fediai, Wolfgang Wenzel, Philippe Turek, Mario Ruben
Summary: The FID-detected nutations of the antiferromagnetic crystal [Y(pc)(2)] show that its radical spin can be driven coherently in its magnetically condensed undeuterated phase at room temperature. In liquid-helium measurements, additional Rabi oscillations were observed, attributed to transitions within higher-multiplicity states of finite-sized chain fragments.
CHEMICAL COMMUNICATIONS
(2021)
Article
Physics, Multidisciplinary
Zezhu Wei, V. F. Mitrovic, D. E. Feldman
Summary: The use of heat transport interferometry can reveal anyonic statistics in charge insulators, even in the absence of charged excitations. By studying the heat transport through different interferometer geometries in Kitaev spin liquids, such as Fabry-Perot and Mach-Zehnder, drastically different behaviors can be observed, demonstrating the effectiveness of this method.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Cristian Zanoci, Brian Swingle
Summary: The study investigates the temperature dependence of energy diffusion in two chaotic gapped quantum spin chains using an open-system approach, introducing energy imbalance by coupling the chains to thermal baths. It compares local reduced density matrices to define an effective local temperature profile and measures energy current for various driving temperatures. The Ising model reveals dilute excitations controlling energy diffusion at low temperatures, while the XZ model data can be described by an expansion around the infinite temperature limit.
Article
Physics, Multidisciplinary
Yan Qin, Sheng-Chang Li
Summary: We investigate the quantum phase transition in an ultracold atom-molecule conversion system involving molecule-molecule interaction using a modified spin-boson model. The properties of ground state, entanglement entropy, and many-body dynamics confirm a second-order phase transition from a pure atom phase to a mixed atom-molecule phase when the energy detuning is below a critical value. We obtain scaling laws and critical exponents to characterize the phase transition, and discuss the effects of ground-state dynamical evolution speed and molecular interaction strength. Our results show that molecular interaction can reduce the upper bound of the adiabatic condition, facilitating the observation of the phase transition in experiments.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Nanoscience & Nanotechnology
Baptiste Jadot, Pierre-Andre Mortemousque, Emmanuel Chanrion, Vivien Thiney, Arne Ludwig, Andreas D. Wieck, Matias Urdampilleta, Christopher Bauerle, Tristan Meunier
Summary: The use of surface acoustic waves to displace two entangled spins while maintaining entanglement over a distance of 6 micrometers provides a pathway for fast on-chip deterministic interconnection of remote quantum bits in semiconductor quantum circuits. This work showcases the potential for long-distance entanglement of spin qubits in semiconductors to enable connectivity of quantum core units for networked quantum computing.
NATURE NANOTECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
V. M. Bastidas
Summary: This Letter theoretically proposes a mechanism to perform topological pumping in arrays of spin chains with complex geometries, by utilizing the topological protection effect.
Article
Multidisciplinary Sciences
Rosa Maskri, Loic Joubert-Doriol
Summary: In this study, the effectiveness of the moving crude adiabatic (MCA) representation in non-adiabatic transitions was evaluated. The results show that MCA is able to properly model non-adiabatic transitions and provides the possibility of regularizing DBOC terms.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Moumita Dey, Suparna Sarkar, Santanu K. Maiti
Summary: This work investigates the interaction between light irradiation, molecular helicity, and electron hopping on spin-selective electron transmission. The results show that the range of electron hopping significantly affects spin polarization, with a larger range resulting in better performance. The degree of spin polarization and its phase can be selectively monitored using light. This study provides valuable insights for the development of spin-based electronic devices using light-driven magnetic helices.
Article
Mechanics
Vir B. Bulchandani, Sarang Gopalakrishnan, Enej Ilievski
Summary: This review summarizes recent advances in understanding anomalous transport in spin chains, particularly through the lens of integrability. Numerical methods based on tensor-network techniques have revealed anomalous transport in many canonical integrable spin chains, such as the Heisenberg model. The framework of generalized hydrodynamics has been extended to explain some of the underlying mechanisms of anomalous transport, with discussions on similarities and differences with other contexts. Further, potential transport anomalies in systems with emergent or approximate integrability are briefly reviewed, with ongoing research on anomalous transport and dynamics.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2021)
Article
Multidisciplinary Sciences
A. Nag, A. Nocera, S. Agrestini, M. Garcia-Fernandez, A. C. Walters, Sang-Wook Cheong, S. Johnston, Ke-Jin Zhou
Summary: This study unveils the hidden quadrupolar constituent in Y2BaNiO5 and demonstrates its unique collective dispersion using Ni L-3-edge resonant inelastic x-ray scattering.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Yotam Wolf, Yizhou Liu, Jiewen Xiao, Noejung Park, Binghai Yan
Summary: Chirality-induced spin selectivity (CISS) refers to the phenomenon where electrons become spin polarized after passing through chiral molecules in a nanoscale transport device or in photoemission experiments. Contrary to common belief, this study finds that both transmitted and reflected electrons exhibit the same type of spin polarization, which is a universal characteristic for two-terminal devices. Chiral molecules act as spin polarizers rather than spin filters, and the direction of spin polarization is determined by the molecule's chirality and the incident direction of the electron. The magnitude of spin polarization is influenced by local spin-orbit coupling in the device.
Article
Physics, Applied
Zhikun Han, Yuqian Dong, Xiaopei Yang, Shuqing Song, Luqing Qiu, Wen Zheng, Jianwen Xu, Tianqi Huang, Zhimin Wang, Dong Lan, Xinsheng Tan, Yang Yu
Summary: Shortcuts to adiabaticity have been shown to be an effective routine for precise quantum state manipulation. In this study, invariant-based shortcuts to adiabaticity were experimentally demonstrated to speed up population transfer in a superconducting circuit. The robustness of the scheme against amplitude and frequency errors was also investigated.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Multidisciplinary
Lei Qiao, Jiangbin Gong
Summary: This paper proposes an innovative scheme to control collective emission rates through a self-interference mechanism, showing that the interference could be constructive or destructive depending on the distance between scatterers and emitters. The interference leads to controllable superradiance and subradiance, and manifests as an abrupt change in emission rates in real time.
PHYSICAL REVIEW LETTERS
(2022)
Editorial Material
Multidisciplinary Sciences
Weiwei Zhu, Jiangbin Gong, Raditya Weda Bomantara
Article
Physics, Multidisciplinary
Xi Liu, Qing-Hai Wang, Jiangbin Gong
Summary: In this paper, we study the self-intersecting energy band structures induced by nonlinearity at the mean-field level, specifically focusing on the intriguing consequence of nonlinear Dirac cones. Our systematic analysis using the Qi-Wu-Zhang model and power law nonlinearity reveals that the Aharonov-Bohm phase associated with an adiabatic process in the momentum space exhibits a jump of pi only at critical nonlinearity, known as Kerr nonlinearity, where the Dirac cone appears and disappears. This result suggests pi-quantization of the Aharonov-Bohm phase as long as the nonlinear Dirac cone exists, while for other powers of nonlinearity, the phase changes continuously with the nonlinear strength. These findings have important implications for experimental measurement of power-law nonlinearity and further exploration of geometric phase and adiabatic following in nonlinear systems.
Article
Physics, Multidisciplinary
Zheyu Cheng, Raditya Weda Bomantara, Haoran Xue, Weiwei Zhu, Jiangbin Gong, Baile Zhang
Summary: This study experimentally verifies the existence of pi/2 modes in an acoustic waveguide array and theoretically proves their characteristics. These findings are expected to motivate further studies of pi/2 modes in quantum systems and potential technological applications.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Kai Yang, Shaoyi Xu, Longwen Zhou, Zhiyuan Zhao, Tianyu Xie, Zhe Ding, Wenchao Ma, Jiangbin Gong, Fazhan Shi, Jiangfeng Du
Summary: Floquet engineering provides a powerful method to generate nonequilibrium topological phases with large topological invariants. This study demonstrates how Floquet Chern insulator phases can be detected through imaging the static and dynamic spin textures in momentum space using the nitrogen-vacancy center in diamond and its synthetic dimensions. The work confirms the versatility of Floquet driving in generating phases with large Chern numbers and establishes an experimental method to detect Floquet topological phases in two and higher spatial dimensions.
Article
Materials Science, Multidisciplinary
Xi Liu, Senmao Tan, Qing-hai Wang, Longwen Zhou, Jiangbin Gong
Summary: This work demonstrates the engineering of Floquet bands through Bloch oscillations by adding a tilted linear potential to periodically driven lattice systems. The band structure and topology can be extensively tuned by adjusting the ratio of competing frequencies.
Article
Optics
Chong Wang, Linhu Li, Jiangbin Gong, Yu-xi Liu
Summary: In this study, a method for arbitrary entangled state transfer through a qubit chain is proposed. By encoding and adiabatic transfer, the dynamic phase differences can be eliminated. This method is robust against both coupling disorder and evolution time disorder.
Article
Materials Science, Multidisciplinary
Muhammad Umer, Jiangbin Gong
Summary: This study reports robust dynamical features of three-dimensional nonlinear systems in connection with intriguing topological bands, revealing distinct characteristics and robustness of surface-polarized masses and analyzing them in connection with the dynamics and topological bands of the linearized Lotka-Volterra equation. The insights learned from Weyl semimetal phases based on a linearized version of the ALVE are still remarkably useful, even though the system dynamics is far beyond the linear regime. This work highlights the relevance and importance of topological boundary modes in analyzing high-dimensional nonlinear systems and hopes to stimulate further topological studies.
Article
Materials Science, Multidisciplinary
Thomas Tuloup, Raditya Weda Bomantara, Jiangbin Gong
Summary: This work investigates the effects of nonlinearity on three-dimensional topological phases, focusing on the behavior of Weyl nodes in Weyl semimetals. It is found that nonlinearity causes Weyl nodes to break down into nodal lines and surfaces while preserving their topological charge. Additional nodal lines may emerge at high nonlinearity. Adiabatic pumping and Aharonov-Bohm interference experiments are proposed as two methods to probe these observed nodal structures.
Article
Materials Science, Multidisciplinary
Linhu Li, Wei Xin Teo, Sen Mu, Jiangbin Gong
Summary: This work reveals a phenomenon similar to absolute negative mobility (ANM) in non-equilibrium systems, regarding eigenstate localization and particle transport. The interaction between two non-Hermitian chains with the same preferred direction causes a reversal of the non-Hermitian skin effect (NHSE) for all eigenmodes. This concept is qualitatively and quantitatively investigated in a non-Hermitian quantum walk platform.
Article
Materials Science, Multidisciplinary
Weiwei Zhu, Jiangbin Gong
Summary: This study discovers a new type of hybrid skin-topological modes in non-Hermitian lattice systems, known as the second-order non-Hermitian skin effect. By introducing gain/loss to two-dimensional Chern insulators and ensuring that the line gap is not closed, all topological edge states can be localized at one corner under the open boundary condition.
Article
Materials Science, Multidisciplinary
Hui-Qiang Liang, Sen Mu, Jiangbin Gong, Linhu Li
Summary: The quantized response is a distinguishing feature of a topological system. In non-Hermitian systems, the spectral winding topology yields a quantized steady-state response. By considering two weakly coupled non-Hermitian chains, the spectral winding topology of one chain can be probed by a steady-state response defined solely on the other chain, revealing unexpected physics of spectral winding topology vs quantized response.
Article
Materials Science, Multidisciplinary
Wei Xin Teo, Weiwei Zhu, Jiangbin Gong
Summary: Two-dimensional laser arrays can be achieved at a large scale by utilizing higher-order topological insulator physics and the non-Hermitian skin effect. By tuning the system parameters appropriately and pumping at a single site, a stable topologically protected lasing mode delocalized across two dimensions can be obtained. Coupled optical ring resonators are proposed as a promising platform for realizing large-scale two-dimensional laser arrays.
Article
Materials Science, Multidisciplinary
Sen Mu, Longwen Zhou, Linhu Li, Jiangbin Gong
Summary: In this work, the coupling between a clean non-Hermitian chain with skin localization and a delocalized chain of the same length is explored. The study reveals interesting consequences such as the induction of a pseudo mobility edge and the gradual takeover of the non-Hermitian skin effect. The quantized winding number characterizes the transition between different phases.
Article
Physics, Multidisciplinary
Nannan Ma, Jiangbin Gong
Summary: The paper presents an unsupervised machine learning protocol that can reliably reveal complex boundaries of nonequilibrium topological phases. It can analyze and discover previously unknown topological phases provided by the time dimension.
PHYSICAL REVIEW RESEARCH
(2022)
