Article
Chemistry, Multidisciplinary
Selena J. Lockyer, Alessandro Chiesa, Adam Brookfield, Grigore A. Timco, George F. S. Whitehead, Eric J. L. McInnes, Stefano Carretta, Richard E. P. Winpenny
Summary: This study presents a supramolecule with two different types of spins and interaction energies. The interaction energies are confirmed using electron paramagnetic resonance (EPR) spectroscopy. Based on the measured parameters, the supramolecule is suggested for simulating quantum decoherence in maximally entangled Bell states that can be used for quantum teleportation.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Physics, Multidisciplinary
Nicolas Mirkin, Diego A. Wisniacki
Summary: The study reveals that a highly disordered environment is beneficial for Quantum Darwinism (QD), with increasing disorder leading to higher objectivity in the system. By quantifying the lack of redundancy to estimate the many-body mobility edge, it is found that objectivity increases as the environment size grows.
Article
Physics, Multidisciplinary
Stanislav Filatov, Marcis Auzinsh
Summary: Quantum decoherence is crucial for the emergence of the classical world, and it can result in stable macroscopic classical states. However, there is also the possibility of decoherence dynamics that lead to stable macroscopic non-classical states. This property, rooted in the decoherence theory itself, implies that environments can steer decoherence towards spatial superpositions of macroscopic objects.
Article
Physics, Multidisciplinary
Inigo Arrazola, Jorge Casanova
Summary: The authors propose a general method for achieving robust entanglement gates using low-intensity dynamical-decoupling pulses and non-tunable qubit-boson coupling. This method allows for faster-than-dispersive entanglement gates and is applicable to any quantum platform with qubits interacting with bosonic mediators via longitudinal coupling. Numerical simulations with trapped ions coupled via magnetic field gradients demonstrate the feasibility of achieving entanglement gates with infidelities of 10(-3) or 10(-4) using current or near-future experimental setups, respectively.
COMMUNICATIONS PHYSICS
(2023)
Article
Optics
Jhen-Dong Lin, Yueh-Nan Chen
Summary: Many-body localization (MBL) can occur when strong disorders prevent an interacting system from thermalization. In this work, a modified algorithm is proposed by performing a measurement on the ancilla, enabling the determination of conditional dynamics by both ensemble average and quantum interference effect. This protocol leads to an enhancement of the dephasing effect and a boost in entanglement growth for systems in the deep MBL phase. Numerical simulations demonstrate a significant reduction in the saturation time, facilitating easier access to the behavior in the long-time regime.
Article
Optics
Lorenzo Rosso, Davide Rossini, Alberto Biella, Leonardo Mazza
Summary: Theoretical analysis has been conducted on the dynamics of a one-dimensional spin-1/2 fermionic gas with weak two-body losses, emphasizing the role of spin conservation in determining the full time evolution. Specifically, the study focuses on the dynamics of gas in different initial states and investigates the emergence of steady symmetry-resolved purification in Mott insulators. These results contribute to the comprehension of experiments involving alkaline-earth gases and fermionic molecules such as ytterbium.
Article
Quantum Science & Technology
Ivana Dimitrova, Stuart Flannigan, Yoo Kyung Lee, Hanzhen Lin, Jesse Amato-Grill, Niklas Jepsen, Ieva Cepaite, Andrew J. Daley, Wolfgang Ketterle
Summary: By manipulating the spin states of ultracold atoms in an optical lattice system, a transition from a fully magnetized state to a correlated zero-magnetization state has been achieved, and the formation of correlations has been demonstrated. These findings highlight the potential and challenges for preparing many-body eigenstates of spin Hamiltonians through adiabatic preparation protocols.
QUANTUM SCIENCE AND TECHNOLOGY
(2023)
Article
Physics, Multidisciplinary
Lionel Tenemeza Kenfack, Moise Raphael Tsimbo Fokou, Mathurin Esouague Ateuafack, Martin Tchoffo
Summary: This study investigates the decoherence process of a central spin induced by a spin chain environment, and examines the impact of the initially prepared state of the spin chain on the decoherence. It is found that the decoherence process is mainly determined by the choice of the initial state, the number of spins, the coupling strength, the anisotropy parameter, and the position from the quantum critical point.
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
(2022)
Article
Physics, Fluids & Plasmas
Mengyao Li, Yingying Xiao, Yongchun Tao, Yi Gao, Peiqing Tong
Summary: Inspired by recent progress in quantum chaos, this study investigates the energy diffusion of a kicked rotor under phase modulation. It finds that classical phase modulation leads to anomalous diffusion, while quantum phase modulation destroys coherence and suppresses dynamical localization. Quasiperiodic phase modulation is an intermediate phase between the standard and random cases.
Article
Optics
W. F. Balthazar, D. G. Braga, V. S. Lamego, M. H. M. Passos, J. A. O. Huguenin
Summary: The paper introduces an all-optical setup to generate various X states using spin-orbit modes and a high intensity laser beam. By simulating spin-orbit tomography, the researchers were able to reconstruct the density matrix and study discord and concurrence for different states, showing good agreement with theoretical predictions. Additionally, two different optical circuits were proposed for preparing the single-photon spin-orbit X state.
Article
Multidisciplinary Sciences
Laird Egan, Dripto M. Debroy, Crystal Noel, Andrew Risinger, Daiwei Zhu, Debopriyo Biswas, Michael Newman, Muyuan Li, Kenneth R. Brown, Marko Cetina, Christopher Monroe
Summary: Quantum error correction encodes information into a larger quantum system to protect it, and fault-tolerant circuits are essential for controlling logical qubits and suppressing errors. Experimental demonstration of fault-tolerant circuits for a Bacon-Shor logical qubit with trapped ion qubits shows significant reductions in error rates in the presence of noise. This indicates the potential of fault-tolerant circuits to enable highly accurate logical primitives in current quantum systems, with the possibility of achieving a stabilized logical qubit through improved gate operations and measurements.
Article
Physics, Multidisciplinary
Chimdessa Gashu Feyisa, Ebisa Mosisa Kanea, Chali Edosa Uga, Abebe Duguma
Summary: This article studies the time evolution of Gaussian quantum correlations induced by the superposition of atomic states. The research shows that generated photon pairs are completely separable in the initial phase, but quantum correlations saturate after some time. Increasing the number of superposed atoms and the atom injection rate enhances the strength of quantum correlations.
CHINESE JOURNAL OF PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Xiaoming Zhang, Da Gao, Xuhan Zhu, Jiale Liu, Wenshuang Wang, Xiangdong Liu, Mingwen Zhao
Summary: Topological superconductivity (TSC) has received significant attention recently, with researchers exploring the potential of different types of Rashba nodal points (RNPs) to induce TSC. By constructing tight-binding models with Rashba spin-orbit coupling (SOC), researchers have demonstrated the possibility of achieving various types of RNPs on 2D Bravais lattices, leading to TSC phases with chiral Majorana edge modes (MEMs). Furthermore, first-principles calculations have shown that the BiSb monolayer could serve as an ideal platform for realizing TSC with high Chern numbers.
Article
Quantum Science & Technology
R. Muthuganesan, V. K. Chandrasekar
Summary: The dynamics of entanglement and measurement-induced nonlocality in a system of two interacting spin-1/2 qubits with intrinsic decoherence were studied under different initial conditions. It was found that the robustness and generation of quantum correlations depend on physical parameters for both pure and separable initial states. Despite phase decoherence, all correlations reach steady state values after exhibiting oscillations, showing that the enhancement of correlations may occur by adjusting the strength of the Dzyaloshinskii-Moriya interaction. Intervention of the magnetic field was found to decrease quantum correlations, and quantum correlations were also observed in unentangled states.
QUANTUM INFORMATION PROCESSING
(2021)
Article
Physics, Multidisciplinary
Pengfei Zhang, Hang Dong, Yu Gao, Liangtian Zhao, Jie Hao, Jean-Yves Desaules, Qiujiang Guo, Jiachen Chen, Jinfeng Deng, Bobo Liu, Wenhui Ren, Yunyan Yao, Xu Zhang, Shibo Xu, Ke Wang, Feitong Jin, Xuhao Zhu, Bing Zhang, Hekang Li, Chao Song, Zhen Wang, Fangli Liu, Zlatko Papic, Lei Ying, H. Wang, Ying-Cheng Lai
Summary: In this experiment, a distinct type of quantum many-body scarring (QMBS) is realized by approximately decoupling a part of the many-body Hilbert space in the computational basis. By utilizing a programmable superconducting processor, Hilbert space scarring is achieved in different geometries, and strong evidence for QMBS states is provided through measurements of qubit population dynamics, quantum fidelity, and entanglement entropy.
Correction
Biochemical Research Methods
Noam Shemesh, Gonzalo A. Alvarez, Lucio Frydman
JOURNAL OF MAGNETIC RESONANCE
(2015)
Article
Multidisciplinary Sciences
Gonzalo A. Alvarez, Dieter Suter, Robin Kaiser
Article
Multidisciplinary Sciences
Gonzalo A. Alvarez, Christian O. Bretschneider, Ran Fischer, Paz London, Hisao Kanda, Shinobu Onoda, Junichi Isoya, David Gershoni, Lucio Frydman
NATURE COMMUNICATIONS
(2015)
Article
Physics, Multidisciplinary
Dieter Suter, Gonzalo A. Alvarez
REVIEWS OF MODERN PHYSICS
(2016)
Article
Physics, Applied
Analia Zwick, Gonzalo A. Alvarez, Gershon Kurizki
PHYSICAL REVIEW APPLIED
(2016)
Article
Multidisciplinary Sciences
Noam Shemesh, Gonzalo A. Alvarez, Lucio Frydman
Article
Multidisciplinary Sciences
Gonzalo A. Alvarez, Noam Shemesh, Lucio Frydman
SCIENTIFIC REPORTS
(2017)
Article
Physics, Applied
Analia Zwick, Dieter Suter, Gershon Kurizki, Gonzalo A. Alvarez
PHYSICAL REVIEW APPLIED
(2020)
Article
Physics, Applied
Milena Capiglioni, Analia Zwick, Pablo Jimenez, Gonzalo A. Alvarez
Summary: The study presents a novel method using MRI to produce images of filtered microstructure sizes without assuming a microstructure distribution model, showcasing the potential of spin-echo decay shifts as a promising tool for noninvasive histology and unraveling diagnostic information based on microscopic parameters of biological tissue.
PHYSICAL REVIEW APPLIED
(2021)
Article
Quantum Science & Technology
Martin Kuffer, Analia Zwick, Gonzalo A. Alvarez
Summary: Reliable processing of quantum information is crucial for the deployment of quantum technologies. However, the nonstationary nature of the environments poses a challenge for quantum sensing. In this study, a path integral framework is introduced to characterize nonstationary environmental fluctuations, providing insights into the physical properties and decoherence effects of out-of-equilibrium-nonstationary environments.
Article
Optics
Federico D. Dominguez, Gonzalo A. Alvarez
Summary: Developing quantum technologies requires understanding and controlling the nonequilibrium dynamics of quantum information in many-body systems. In this paper, a model adapted from solid-state NMR methods is developed to quantify information scrambling. By considering imperfections, expressions for out-of-time order correlators (OTOCs) are derived to measure observable information scrambling based on the number of active spins where the information was spread. Decoherence effects naturally arise, inducing localization of the measurable degree of information scrambling, defining a localization cluster size for the observable number of active spins that determines a dynamical equilibrium.
Article
Optics
Federico D. Dominguez, Maria Cristina Rodriguez, Robin Kaiser, Dieter Suter, Gonzalo A. Alvarez
Summary: This study demonstrates the resilience of controlled dynamics in quantum information, which is promising for reliable control of large quantum systems. The sensitivity of controlled Hamiltonian evolution to perturbations is quantified, showing a decay rate of process fidelity that increases with the effective number of correlated qubits K. There is a decoherence scaling transition of the exponent alpha based on perturbation strength, suggesting two distinct dynamical regimes.
Review
Engineering, Multidisciplinary
Gershon Kurizki, Gonzalo A. Alvarez, Analia Zwick
Article
Optics
Analia Zwick, Gonzalo A. Alvarez, Gershon Kurizki
Article
Computer Science, Theory & Methods
Analia Zwick, Gonzalo A. Alvarez, Joachim Stolze, Omar Osenda
QUANTUM INFORMATION & COMPUTATION
(2015)