Article
Physics, Multidisciplinary
H-Y Liang, L-Y Qiu, Y-B Yang, H-X Yang, T. Tian, Y. Xu, L-M Duan
Summary: This study observed a new phenomenon where heat exhibits power-law scaling when a system is linearly driven from a polar phase to an antiferromagnetic phase across a first-order quantum phase transition. The heat generated during two non-equilibrium processes was experimentally evaluated and the scaling exponents measured agreed well with numerical simulation results. This work opens up a new avenue for experimentally and theoretically exploring the properties of heat in non-equilibrium dynamics.
NEW JOURNAL OF PHYSICS
(2021)
Article
Multidisciplinary Sciences
Bertrand Evrard, An Qu, Jean Dalibard, Fabrice Gerbier
Summary: In this study, a three-fragment condensate was produced for a mesoscopic spin-1 gas with anti-ferromagnetic interactions and vanishing collective spin. The reconstructed state was found to be close to the expected many-body ground state using spin-resolved detection, while one-body observables remained the same as for a completely mixed state. This highlights how the interplay between symmetry and interactions generates entanglement in a mesoscopic quantum system.
Review
Astronomy & Astrophysics
Pan Li, Yi Ling, Zhangping Yu
Summary: We investigate the generation rate of quantum gravity induced entanglement of masses (QGEM) in setups with multiple quantum massive particles, among which only the gravity interaction due to the Newton potential is taken into account. When the distance between any two adjacent Stern-Gerlach devices is fixed, we consider all the possible configurations of the setup with the same number of particles. We find that the prism setup with a massive particle at the center is the most efficient setup for the entanglement generation.
Article
Physics, Multidisciplinary
Karol Gietka, Ayaka Usui, Jianqiao Deng, Thomas Busch
Summary: The study introduces a framework and example demonstrating how two distinct Hamiltonians in the same space can simulate the same physics. By simulating a specific quantum system, a method for creating maximally entangled states among multiple bodies is shown.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Dmitriy Dovzhenko, Denis Aristov, Lucinda Pickup, Helgi Sigurosson, Pavlos Lagoudakis
Summary: We experimentally observed the next-nearest-neighbor coupling between ballistically expanding spinor exciton-polariton condensates in a planar semiconductor microcavity. We demonstrated all-optical control over the coupling strength between neighboring condensates by distance-periodic pseudospin screening. By screening the nearest-neighbor coupling, we overcame the conventional spatial coupling hierarchy between condensates.
Article
Optics
Z. N. Hardesty-Shaw, Q. Guan, J. O. Austin, D. Blume, R. J. Lewis-Swan, Y. Liu
Summary: This research demonstrates the dynamic coupling of spatial and spin degrees of freedom in cold atom quantum simulators, enhancing their programmability. The study reveals the impact of spatial evolution on spin mixing and develops a model incorporating time-dependent spin-spin interactions.
Article
Physics, Multidisciplinary
Maximilian Pruefer, Daniel Spitz, Stefan Lannig, Helmut Strobel, Juergen Berges, Markus K. Oberthaler
Summary: A quantum simulation experiment using a one-dimensional spinor Bose gas reveals the thermalization of a ferromagnetic system, providing insights into the condensation dynamics of large magnetic systems. The experiment demonstrates the emergence of long-range coherence and spin-superfluidity, and reveals the structure of different modes resulting from explicit and spontaneous symmetry breaking.
Article
Materials Science, Multidisciplinary
Ceren B. Dag, Yidan Wang, Philipp Uhrich, Xuesen Na, Jad C. Halimeh
Summary: We find a self-similar prethermal dynamical regime in the time evolution of one-dimensional spin chains when quenching near a quantum phase transition. This regime is analytically determined by the ground-state energy gap and exists universally regardless of the probe site, weak interactions, or the initial state. The resulting prethermal dynamics result in an out-of-equilibrium scaling function of the order parameter near the transition. Our theory suggests that sudden quench dynamics can lead to universal critical slowing down near the critical point.
Article
Physics, Multidisciplinary
Fabio Benatti, Francesca Gebbia, Stefano Pisoni
Summary: In this paper, we discuss the generation and long-time persistence of entanglement in open two-qubit systems undergoing filtering and Markovian feedback. We analyze whether these operations can enhance the environment's ability to generate entanglement in the short-term and whether the generated entanglement can survive in the long-term. We demonstrate that in the case of a particularly symmetric Gorini-Kossakowski-Sudarshan-Lindblad model, it is possible to fully control the convex set of stationary states and the asymptotic behavior of any initial two-qubit state. We also study the impact of a specific class of feedback operations on the considered dynamics.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2023)
Article
Physics, Multidisciplinary
Bertrand Evrard, An Qu, Jean Dalibard, Fabrice Gerbier
Summary: The dynamics of a many-body system can exhibit various behaviors, from reversible evolution to thermalization. The linear energy spectrum and undamped oscillations of many-body observables occur when the system can be described by a Bogoliubov analysis, while nonlinearity leads to irreversibility. Chaotic dynamics and thermalization emerge when the integrability of the Hamiltonian is broken, in agreement with the eigenstate thermalization hypothesis paradigm.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
Elahe Samimi, Mohammad Hossein Zarei, Afshin Montakhab
Summary: In this paper, the concept of multipartite entanglement is used to study topological quantum phase transitions. The results show that there is a continuous and sharp transition of global entanglement from a maximum value in the topological phase to zero in the magnetized phase. The introduction of conditional global entanglement provides a good measure of multipartite entanglement in TQPTs.
Article
Physics, Condensed Matter
Wajid Joyia, Salman Khan, Khalid Khan
Summary: By studying the behavior of bipartite and tripartite quantum coherence in the Heisenberg XXZ spin-1/2 chain, it was found that bipartite entanglement exactly equals quantum coherence, while tripartite entanglement is always less than quantum coherence. Quantum coherence becomes nonanalytic near the critical point and can be used to predict quantum phase transitions.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Physics, Condensed Matter
Wajid Joyia, Salman Khan, Khalid Khan
Summary: The behavior of bipartite and tripartite quantum coherence in Heisenberg X X Z spin-1/2 chain in the presence of an applied magnetic field was studied using quantum renormalization group method. It was found that quantum coherence becomes nonanalytic near the critical point and can be used to predict quantum phase transitions in the system. The relative strength of the applied magnetic field to the system's anisotropy significantly affects the critical point, and the nature of quantum coherence, whether monogamous or polygamous, depends on the size of the system within a certain range of anisotropy.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Optics
G. Vanhaele, A. Baecker, R. Ketzmerick, P. Schlagheck
Summary: This paper introduces how to generate highly entangled Triple-NOON states using interacting ultracold bosonic atoms in a symmetric three-site lattice. By applying a periodic driving of the lattice, the collective tunneling process can be significantly sped up without affecting the purity of the superposition. Using 87Rb atoms, a Triple-NOON state containing 5 particles can be achieved in a few seconds.
Article
Quantum Science & Technology
M. Tahir Iftikhar, M. Usman, Khalid Khan
Summary: The study reveals that multipartite entanglement is more robust than bipartite entanglement in many-body quantum systems due to the monogamy property. By using the quantum renormalization group technique to solve the two-dimensional XXZ model, two saturated values representing different phases are observed, and the derivatives and scaling behavior of these values are computed. Moreover, it is found that the scaling exponent at the critical point can describe the correlation length of the model for both multipartite entanglement and trace distance.
QUANTUM INFORMATION PROCESSING
(2021)
