Article
Optics
A. D. Garcia-Orozco, L. Madeira, M. A. Moreno-Armijos, A. R. Fritsch, P. E. S. Tavares, P. C. M. Castilho, A. Cidrim, G. Roati, V. S. Bagnato
Summary: We studied the emergence of universal scaling in the time-evolving momentum distribution of a harmonically trapped three-dimensional Bose-Einstein condensate, which was parametrically driven to a turbulent state. We found that the out-of-equilibrium dynamics post excitation can be described by a single function due to nearby nonthermal fixed points. The observed behavior connects the dynamics of a quantum turbulent state to several far-from-equilibrium phenomena.
Article
Multidisciplinary Sciences
Mengjie Wei, Wouter Verstraelen, Konstantinos Orfanakis, Arvydas Ruseckas, Timothy C. H. Liew, Ifor D. W. Samuel, Graham A. Turnbull, Hamid Ohadi
Summary: The authors demonstrate the on-the-fly reconfigurable optical trapping of organic polariton condensates, which are delocalized over a macroscopic distance from the excitation region. This study holds great potential for future research on polaritonic lattice physics.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Yaojun Ying, Lizhen Sun, Haibin Li
Summary: The dynamics of Bose-Einstein condensates (BECs) in a single-well potential are investigated using the mode-coupling method. It is found that symmetry plays a crucial role in the coupling between modes. A proper mode-coupling theory of BECs in a single-well potential should include at least four modes. The mode dynamics of non-ideal BECs with interaction exhibit rich behavior, with the combination of nonlinear coupling and initial condition leading to different regimes of mode dynamics.
Article
Physics, Fluids & Plasmas
Yue Jian, Xin Qiao, Jun-Cheng Liang, Zi-Fa Yu, Ai-Xia Zhang, Ju-Kui Xue
Summary: This study investigates the stability and superfluidity of a Bose-Einstein condensate in a two-leg ladder with magnetic field, revealing three phases and a strong dependence on various parameters. The atomic interaction strength plays a significant role in modifying the energy band structure during phase transitions. Furthermore, the study shows that the dynamics and superfluidity of the system can be controlled by adjusting the atomic interaction strength, rung-to-leg coupling ratio, and magnetic flux.
Article
Mathematics, Applied
Zhaopin Chen, Yongyao Li, Yan Liu, Boris A. Malomed
Summary: By using numerical methods, it is found that symmetric two-layer solitons in a double-layer system undergo a spontaneous-symmetry-breaking (SSB) bifurcation, producing families of asymmetric 2D solitons. The collapse occurs when the soliton's norm exceeds the norm of the Townes solitons. The SSB instability leads to dynamical symmetry breaking and spontaneous drift in the solitons.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2023)
Article
Optics
J. Smits, H. T. C. Stoof, P. van der Straten
Summary: This study presents the observation and analysis of a spontaneously broken discrete time-translation symmetry in a driven system, showing a 50-50 split between two stable and temporal-distinct solutions. The experiment allows for further exploration of symmetry breaking in the discrete time crystal and for engineering excitations in space and time in the quantum domain.
Article
Physics, Multidisciplinary
Lei Chen, Qizhong Zhu
Summary: In this study, we investigated the impact of density-dependent gauge field on the collective dynamics of a harmonically trapped Bose-Einstein condensate (BEC). We found that, under strong coupling, the collective motion of a quasi-two-dimensional condensate can become chaotic.
NEW JOURNAL OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
S. Baryshev, A. Zasedatelev, H. Sigurdsson, I Gnusov, J. D. Topfer, A. Askitopoulos, P. G. Lagoudakis
Summary: In this study, we conducted full polarization tomography on photon correlations in a spinor exciton-polariton condensate. Our measurements demonstrate the different forms of condensate pseudospin mean-field dynamics and their intrinsic relation to the condensate photon statistics.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Tuguldur Kh Begzjav, Duger Ulam-Orgikh
Summary: In this work, the theory for spin-1 Bose-Einstein condensate (BEC) based on SU(3) Lie group is developed, and it is predicted that any spin-1 atom can exist in either of two inequivalent fundamental representations of SU(3). The ground state of the spin-1 BEC can be either ferromagnetic or antiferromagnetic depending on the sign of a (1,1) - a (0,0), and the coherent spin mixing process is due to collisions between atoms in specific representations.
Article
Multidisciplinary Sciences
Silvana Palacios Alvarez, Pau Gomez, Simon Coop, Roberto Zamora-Zamora, Chiara Mazzinghi, Morgan W. Mitchell
Summary: We present a magnetic sensor with extremely high energy resolution, applied in the detection of Rb-87 single-domain spinor Bose-Einstein condensates. By utilizing nondestructive Faraday rotation probing, we have achieved a low-frequency magnetic sensitivity of 72(8) fT, and measured the volume, spin coherence time, and readout noise of the condensate experimentally.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Mathematics, Interdisciplinary Applications
Mikhail N. Smolyakov
Summary: In this paper, quantization of a weakly nonideal Bose gas at zero temperature is performed along the lines of the well-known Bogolyubov approach. By introducing nonoscillation modes and calculating nonlinear corrections, the analysis successfully recovers canonical commutation relations and solves the issue of nonconserved particle number at least in the case of free quasi-particles.
CHAOS SOLITONS & FRACTALS
(2021)
Article
Optics
M. Miskeen Khan, H. Tercas, J. T. Mendonca, J. Wehr, C. Charalambous, M. Lewenstein, M. A. Garcia-March
Summary: The study investigates the quantum motion of an impurity atom in a Bose-Einstein condensate in arbitrary dimensions, showing superdiffusive behavior, dimension-dependent average energy, and non-Markovianity of particle motion. Trapped impurity atoms exhibit stronger position squeezing in lower dimensions.
Article
Optics
Yuhang Nie, Jun-Hui Zheng, Tao Yang
Summary: In this article, we investigate the Bogoliubov excitation spectrum of quantum droplets in an optical lattice and classify the collective excitations into different modes. The oscillation frequencies and phononic modes of the droplets are measured through experimental measurements. Furthermore, the instability caused by density fluctuations and the critical filling of atoms are discussed. This work is essential for understanding the superfluid nature of quantum droplets in an optical lattice.
Article
Optics
Boyao Li, Xingjie Wang, Yaoyao Liang, Jinghua Sun, Sufang Zhu, Xiaoyong Chen, Guiyao Zhou
Summary: This study reports the generation of vectorial solitons in a single cavity induced by dual-core fiber assisted ultrafast fiber lasers. It was found that four-component polarized rotation vector solitons (PRVS) are generated using the dispersive Fourier transformation technique. Furthermore, by controlling the soliton phase offset in dual-core fiber, the soliton rain state of multi pulse evolution can be obtained.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Mateus C. P. dos Santos, Wesley B. Cardoso
Summary: The paper analyzes the spontaneous symmetry breaking induced by a specific component in a linearly coupled binary Bose-Einstein condensate. Through numerical simulations, symmetric and asymmetric ground states are obtained, and induced asymmetry in the partner field is observed, demonstrating the influence of linear coupling on the balance between atomic species and the appearance of Josephson and SSB phases.
NONLINEAR DYNAMICS
(2023)
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)