Article
Multidisciplinary Sciences
A. Kyprianidis, F. Machado, W. Morong, P. Becker, K. S. Collins, D. Else, L. Feng, P. W. Hess, C. Nayak, G. Pagano, N. Y. Yao, C. Monroe
Summary: Extending statistical physics to nonequilibrium settings has led to the discovery of new phases of matter catalyzed by periodic driving. This study showcases the utilization of a trapped-ion quantum simulator to observe a prethermal discrete time crystal without disorder, circumventing the heating problem using high-frequency driving. Floquet prethermalization is proposed as a general strategy for creating, stabilizing, and studying intrinsically out-of-equilibrium phases of matter.
Article
Materials Science, Multidisciplinary
Aidan Zabalo, Emil A. Yuzbashyan
Summary: We study the quench dynamics of a topological p-wave superfluid with two competing order parameters, finding the emergence of phase III' behavior involving growth of Delta-(t) and chaotic oscillations of both order parameters. Additionally, the model exhibits phase I and phase II dynamics, with different decay and oscillation patterns of the order parameters. Despite the nonintegrability of the system, exact phase boundaries in parameter space are mapped out, showing the instability of phase III' with respect to breaking time-reversal symmetry.
Article
Optics
J. M. Betancourt, F. J. Rodriguez, L. Quiroga, N. F. Johnson
Summary: This passage discusses the discovery of singularitylike structures in the deep strong-coupling limit of qubit-oscillator systems described by the quantum Rabi model, which may lead to new forms of dynamical phase transitions and have implications for quantum information processing schemes.
Article
Chemistry, Multidisciplinary
Priya Tiwari, Saurabh Kumar Srivastav, Sujay Ray, Tanmoy Das, Aveek Bid
Summary: This study reports the experimental realization of time-reversal invariant helical edge-modes in bilayer graphene/monolayer WSe2-based heterostructures, which are considered as precursors to generic topological insulators. The topological phase observed in the study is characterized by bulk bandgap and helical edge-modes with quantized electrical conductance. The study also demonstrates the tunability of different topological phases with electric and magnetic fields, allowing for topological phase transitions between trivial and distinct phases.
Article
Optics
Klaus M. Frahm, Dima L. Shepelyansky
Summary: The evolution of entangled Einstein-Podolsky-Rosen (EPR) pairs in a regime of quantum chaos was studied, revealing that quantum evolution remains reversible despite classical chaos instability. Measurements of one particle disrupt the exact time reversal of another particle, demonstrating only approximate time reversibility. Experimental investigations of time reversal of chaotic EPR pairs are feasible within current cold atom capabilities.
EUROPEAN PHYSICAL JOURNAL D
(2021)
Article
Optics
Yicheng Zhu, Xingliang Wu, Kangbo Wang, Wenlan Shuai, Jianzhong Zhang, Lijun Qiao, Tao Wang, Shaohua Gao, Mingjiang Zhang
Summary: In this study, the local Brillouin dynamic grating (BDG) based on a chaotic laser in a polarization-maintaining fiber was experimentally observed for the first time, with the grating length adjustable by changing the optical spectral width of the chaotic laser. Reflection spectrum characteristics versus the grating length were further analyzed, showing agreement with fiber Bragg grating theory, and temperature distributed measurements based on the chaotic BDG were demonstrated with centimeter-level spatial resolution.
Article
Physics, Multidisciplinary
Xinsheng Tan, Dan-Wei Zhang, Wen Zheng, Xiaopei Yang, Shuqing Song, Mikun Han, Yuqian Dong, Zhimin Wang, Dong Lan, Hui Yan, Shi-Liang Zhu, Yang Yu
Summary: Monopoles are important in physics, with two fundamental types: vector monopoles and tensor monopoles. While vector monopoles have been extensively studied and observed in condensed matter, tensor monopoles are less studied and their observation has not been reported yet. Through experimental methods, the energy structure of a 4D Weyl-like Hamiltonian with tensor monopoles has been imaged, and the first experiment measuring Dixmier-Douady invariant for tensor monopoles has been reported. The observation of topological phase transitions characterized by the Dixmier-Douady invariant is a significant finding in this study.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
J. Benary, C. Baals, E. Bernhart, J. Jiang, M. Roehrle, H. Ott
Summary: In this work, we study a multi-mode system of driven nonlinear optical resonator using an ultracold bosonic quantum gas. We measure the effective Liouvillian gap of the system and provide evidence for a first order dissipative phase transition. The multi-mode nature of the system allows us to identify a non-equilibrium condensation process.
NEW JOURNAL OF PHYSICS
(2022)
Article
Quantum Science & Technology
Ivana Mastroserio, Stefano Gherardini, Cosimo Lovecchio, Tommaso Calarco, Simone Montangero, Francesco S. Cataliotti, Filippo Caruso
Summary: The researchers have successfully achieved time-reversal operations using the dressed chopped random basis optimal control algorithm. Their findings demonstrate that by designing optimal modulated radio frequency fields, high-precision time-reversal transformations can be achieved in a Bose-Einstein condensate composed of non-interacting atoms. These results are expected to significantly advance the implementation of time-reversal operations in gate-based quantum computing.
ADVANCED QUANTUM TECHNOLOGIES
(2022)
Article
Quantum Science & Technology
Evan Peters, Prasanth Shyamsundar, Andy C. Y. Li, Gabriel Perdue
Summary: As quantum computers with large numbers of qubits become more available, it is important to efficiently select a subset of high-performing physical qubits for executing quantum programs. In this research, we propose a practical solution to the problem of qubit assignment using simulated annealing and a cost function based on the reversibility of a quantum process. The use of Loschmidt echoes and simulated annealing provides a scalable and flexible approach to optimizing qubit assignment on near-term hardware, as demonstrated through theoretical justification, experimental validation, and classical simulations.
Article
Physics, Multidisciplinary
Yang Wang, Xinyao Yu, Shichuan Xue, Yizhi Wang, Junwei Zhan, Chao Wu, Pingyu Zhu, Qilin Zheng, Miaomiao Yu, Yingwen Liu, Xiaogang Qiang, Junjie Wu, Xuejun Yang, Ping Xu
Summary: This study explores the application of time-reversal symmetry breaking quantum walk models in quantum transport and demonstrates related experiments on a silicon photonic chip, showcasing the advantages in perfect state transfer, quantum switch, and transport speedup.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2022)
Article
Multidisciplinary Sciences
Mohammadamin Tajik, Marek Gluza, Nicolas Sebe, Philipp Schuettelkopf, Federica Cataldini, Joao Sabino, Frederik Moller, Si-Cong Ji, Sebastian Erne, Giacomo Guarnieri, Spyros Sotiriadis, Jens Eisert, Jorg Schmiedmayer
Summary: We investigate signal propagation in a quantum field simulator of the Klein-Gordon model using two strongly coupled parallel one-dimensional quasi-condensates. We observe the propagation of correlations along sharp light-cone fronts by measuring local phononic fields after a quench. The curved propagation fronts and reflection at sharp edges are observed when the local atomic density is inhomogeneous. By comparing the data with theoretical predictions, we find agreement with curved geodesics of an inhomogeneous metric.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Optics
Vimalesh Kumar Vimal, H. Wanare, V. Subrahmanyam
Summary: We investigate the behavior of the Loschmidt echo in a one-dimensional spin chain with Kitaev-type interaction under constant and kicked magnetic fields. The characteristics of the Loschmidt echo vary for different initial states, system sizes, and proximity to the critical point. The presence of magnon excitations in the initial states affects the revival peaks of the Loschmidt echo, while the momentum distribution function exhibits maxima associated with the magnon's momentum. Additionally, the kick period has an impact on the behavior of the Loschmidt echo, with a specific period resulting in no evolution of the echo regardless of the system size.
Article
Optics
C. M. Sanchez, A. K. Chattah, H. M. Pastawski
Summary: Loschmidt echoes (LEs) are valuable tools in identifying and compensating for decoherence in many-body systems. This study provides experimental evidence supporting the central hypothesis of irreversibility.
Article
Physics, Multidisciplinary
Kazuyuki Kuroyama, Sadashige Matsuo, Jo Muramoto, Shunsuke Yabunaka, Sascha R. Valentin, Arne Ludwig, Andreas D. Wieck, Yasuhiro Tokura, Seigo Tarucha
Summary: We report experimental observations of charge-spin cooperative dynamics of two-electron states in a GaAs double quantum dot located in a nonequilibrium phonon environment. The spin-flip rate of a single electron is significantly enhanced when the phonon energy exceeds the lowest excitation energy in the quantum dot. In addition, the spatial gradient of phonon density between the dots leads to a higher probability of parallel spin states than antiparallel ones.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Usman Khan, Bakht Amin, Kefayat Ullah, Arif Ullah
Article
Optics
Umer Wahid, Aftab Khan, Bakht Amin, Arif Ullah
Article
Physics, Multidisciplinary
Latif Khan, Bakht Amin Bacha, Umer Wahid, Arif Ullah
Article
Physics, Multidisciplinary
Muhammad Khan, Muhammad Idrees, Bakth Amin Bacha, Arif Ullah, Muhammad Haneef
Summary: This study investigates the control and modification of divergence angle and birefringent rotary photon drags under the effect of quantum tunnelling. It is found that the divergence angles and rotary photon dragging angles are modified with the strength of tunnelling frequencies, and circularly polarized beams show superluminal group velocities under this effect.
Article
Physics, Multidisciplinary
Gohar Zeb Khan, Imrana Ashraf, Arif Ullah, Bakht Amin Bacha
Summary: The phase and velocity sensitivity at the interface between a three level atomic medium and a Silver Silica nano-composites material were calculated using surface plasmon polaritons waves. The group velocity and delay/advance times of the SPPs were enhanced due to a large kink in the real part of the dispersion relation in the large interaction zone. The velocity sensitivity was found to be influenced significantly by the volume fractional change of nano particles, probe/control field detuning, and Rabi frequency of the control field.
Article
Quantum Science & Technology
Atta Ur Rahman, Muhammad Noman, Muhammad Javed, Ming-Xing Luo, Arif Ullah
Summary: The study examines the preservation of quantum coherence and entanglement in three non-interacting qubits subjected to an external fluctuating field with classical Gaussian noise. Different couplings and noise significantly affect quantum correlation and coherence, with the X-G state showing more dominant and robust non-local correlation and coherence under Gaussian noise, making it a valuable resource for transmitting quantum information with reduced loss.
QUANTUM INFORMATION PROCESSING
(2021)
Article
Physics, Multidisciplinary
Atta Ur Rahman, Muhammad Noman, Muhammad Javed, Arif Ullah
Summary: This study explores the time evolution of entanglement, purity, and coherence in two non-interacting maximally entangled qubits under different classical environmental configurations, focusing on the dephasing effects caused by Gaussian noises. It is found that both pure and mixed forms of noises are highly dephasing, with faster decay under F-G noise than P-L noise. The independent system-environment configuration shows slightly longer preservation of quantum correlations, purity, and coherence compared to common environments.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Physics, Multidisciplinary
Atta Ur Rahman, Muhammad Javed, ZhaoXu Ji, Arif Ullah
Summary: This paper addresses the issues of entanglement, coherence, and information protection in a system of four non-interacting qubits coupled with different classical environments. It shows that the preservation of quantum information in the four-qubit state is more dependent on coherence than entanglement, and this dependence is highly vulnerable in environments with ORU noise. The Gaussian nature of the noise is found to be responsible for the observed Markovian dynamical map and suppression of the fluctuating character of the environments. The number of environments has a direct impact on the decay rate of quantum phenomena.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Quantum Science & Technology
Atta Ur Rahman, Muhammad Javed, Arif Ullah, Zhaoxu Ji
Summary: This study investigates the time evolution of tripartite entanglement and coherence in GHZ-like state under different classical environments. It finds that environments with mixed disorders have a greater impact on the preservation of entanglement and coherence than those with single disorders. The negative consequences of fractional Gaussian noise-assisted classical environments cannot be fully avoided in both pure and mixed noise conditions.
QUANTUM INFORMATION PROCESSING
(2021)
Article
Physics, Multidisciplinary
Sana Ullah, Bakht Amin Bacha, Arif Ullah
Summary: The dependence of phase and orbital angular momentum (OAM) of the pump and control fields in a Raman gain-assisted four level atomic system using a Mach-Zehnder type Sagnac interferometer (MZSI) is proposed for the investigation of rotary photon drag. Significant improvements in the rotary photon drag angles are achieved by adjusting the phase angle of the pump and control fields.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Quantum Science & Technology
Atta Ur Rahman, Saeed Haddadi, Muhammad Javed, Lionel Tenemeza Kenfack, Arif Ullah
Summary: We investigate the behavior of tripartite entanglement and entropy disorder in three non-interacting qubits under the influence of classical transmitting channels affected by fractional Gaussian (FG) noise. Different couplings between the qubits and channels show different capacities of GHZ and W states in protecting entanglement and avoiding entropy disorder. The initial design of the statistical ensemble states and the medium they are exposed to play a crucial role in the retention of initial state entanglement. We find that FG noise is more detrimental than local noises in generating entropy disorder and destroying tripartite quantum correlations, but increasing the FG noise parameter known as the Hurst exponent can preserve these correlations.
QUANTUM INFORMATION PROCESSING
(2022)
Article
Physics, Multidisciplinary
Syed Muhammad Arif, Bakht Amin Bacha, Umer Wahid, Arif Ullah, Muhammad Haneef
Summary: This study investigates the changes in absorption coefficients, refractive/group indices, phase shifts, and fractional change of birefringence beams through dynamic chiral atomic medium under the effect of quantum tunnelling. The birefringence of phase and group indices is controlled and modified through induced dynamic chiral medium by tunnelling effect, with reported group velocities and maximum change in birefringent phase shifts calculated. These results are important for scatterplate phase shifting interferometry.
Article
Physics, Multidisciplinary
Sami Ullah, Umer Wahid, Bakht Amin Bacha, Arif Ullah, Zakir Ullah
Summary: The paper explores the modification of the dispersion relation of surface plasmon polaritons (SPPs) by the dielectric tensor of a four-level atomic medium coupled with the dielectric function of silver silica nano-composites. Rapid damping of SPPs is utilized to localize atomic particles in two dimensions, with the direction, phase, and intensity of the control field playing crucial roles. Different quadrants exhibit ten, six, four, and two localization peaks, along with a single broad peak symmetric about the origin, which may have implications for quantum information in Plasmonster technology.
Article
Optics
Muhammad Idrees, Muhib Ullah, Bakth Amin Bacha, Arif Ullah, Li-Gang Wang
Article
Physics, Multidisciplinary
M. Ijaz Khan, Muhammad Idrees, Bakth Amin Bacha, Humayun Khan, Arif Ullah, Muhammad Haneef
