Article
Mathematics, Interdisciplinary Applications
M. Momeni
Summary: The study investigates the stochastic nature of magnetization dynamics of dipole-dipole interactions described by the Landau-Lifshitz-Gilbert equation without considering the Gilbert damping parameter. It is found that the occurrence of complex dynamic states depends on the spatial anisotropy of interactions and the lattice geometry. The higher-order moments of the magnetization fluctuations reveal two significant dynamical regimes, regular and chaos, depending on the perturbation strength. The correlation and persistence of the magnetization fluctuations are analyzed using the Hurst exponent obtained by the standard deviation principle, showing a transition from an anti-correlated to a positively correlated system as the relevant parameters vary.
INTERNATIONAL JOURNAL OF BIFURCATION AND CHAOS
(2023)
Article
Materials Science, Multidisciplinary
Devendra Singh Bhakuni, Lea F. Santos, Yevgeny Bar Lev
Summary: A mechanism to suppress heating in periodically driven many-body quantum systems is proposed, utilizing long-range interactions and relevant initial conditions. Decreasing the driving frequency can reduce heating and entanglement buildup in these systems. This mechanism is robust to local perturbations and can be generalized to higher dimensions.
Article
Optics
Si-Lin Chen, Lin-Xue Wang, Lin Wen, Chao-Qing Dai, Jian-Ke Liu, Xiao-Fei Zhang
Summary: The study maps out the ground-state phase diagrams of a binary Bose-Einstein condensate with long-range dipolar and soft-core interactions, considering the orientation of the dipoles. The results demonstrate a variety of ground state phases, such as supersolid, standing wave, and stripe-on-plane wave phases, resulting from the interplay between long-range isotropic and anisotropic interactions.
Article
Physics, Multidisciplinary
Timur V. Tscherbul, Jun Ye, Ana Maria Rey
Summary: We propose a general protocol for generating robust entangled states of nuclear and/or electron spins of ultracold polar molecules using electric dipolar interactions. By encoding a spin-1/2 degree of freedom in a combined set of spin and rotational molecular levels, we theoretically demonstrate effective spin-spin interactions enabled by efficient magnetic control over electric dipolar interactions. These interactions can be used to create long-lived cluster and squeezed spin states.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Matthew W. Butcher, J. H. Pixley, Andriy H. Nevidomskyy
Summary: The study investigates the quantum phase transition of an Ising chain embedded in a bosonic bath with Ohmic dissipation through quantum-to-classical mapping and classical Monte Carlo simulation. The results show that a dissipative bosonic bath can induce a long-range ordered phase.
Article
Materials Science, Multidisciplinary
Haoting Xu, Hae-Young Kee
Summary: We investigate a way to create entangled Majorana fermions in the spin -21 Kitaev chain with open boundary conditions. By applying a pair pulse sequence, we can promote long-distance spin correlations and obtain maximal bipartite entanglement entropy. Comparing with entangled Bell pairs, the Kitaev chain reaches maximal entanglement entropy faster due to the exclusion of zero modes. We also apply our results to the twisted Kitaev chain CoNb2O6 and discuss future directions.
Article
Physics, Applied
Qiang Zhao
Summary: In this paper, the spin dynamics of spin-2 Bose-Einstein condensates with spin-orbit coupling and dipole-dipole interaction are studied. The results show that the periodic oscillation of spin dynamics is broken in the presence of dipole-dipole interaction, and the thermalization time decreases with increasing magnetization.
MODERN PHYSICS LETTERS B
(2022)
Review
Optics
Tong Cui, Lin Sun, Benfeng Bai, Hong-Bo Sun
Summary: Photonic spin-orbit interactions in nanostructures have attracted significant interest in nanophotonics, offering new opportunities for enhancing light-matter interactions at the nanoscale. Various phenomena such as the photonic spin-Hall effect and spin-vortex conversion have been demonstrated, highlighting the potential of PSOIs in shaping light wavefronts. The review systematically covers experimental observations and detections of PSOIs, discussing the advantages, challenges, and future perspectives in probing these interactions.
LASER & PHOTONICS REVIEWS
(2021)
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
S. -B. Zhang, Z. -L. Ba, D. -H. Ning, N. -F. Zhai, Z. -T. Lu, D. Sheng
Summary: Among the four fundamental forces, only gravity does not couple to particle spins. This principle was tested by searching for an anomalous scalar coupling between the neutron spin and the Earth's gravity on the ground. The results set an upper limit on the coupling energy between the neutron spin and gravity at 5.3 x 10-22 eV (95% confidence level), improving the previous limit by a factor of 17. These results also have implications for constraining other anomalous interactions, such as axion-mediated monopole-dipole interactions.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Kazuyuki Sanada, Yuan Miao, Hosho Katsura
Summary: The paper introduces and studies several classes of quantum spin models with multibody interactions that exhibit quantum many-body scars. The models are constructed using two different methods, and it is found that the scar states behave differently from thermal states and exhibit perfectly periodic revivals in dynamics.
Article
Physics, Multidisciplinary
Yuting Tan, Dao-Xin Yao
Summary: We investigate the effects of long-range interactions on the spin wave spectra and competition between magnetic phases on a frustrated square lattice. Analytical expressions for spin wave spectra are obtained for systems with competing Neel and (pi, o) stripe states, under any-order long-range interactions. Surprisingly, staggered long-range interaction suppresses quantum fluctuation and enlarges the ordered moment, extending the phase boundary between Neel and stripe states.
FRONTIERS OF PHYSICS
(2023)
Article
Optics
Mansoura Oumennana, Atta Ur Rahman, Mostafa Mansour
Summary: We study the dynamics of quantum coherence and non-classical correlations in a two-qubit Heisenberg spin-1/2 chain, incorporating the effects of temperature, Dzyaloshinsky-Moriya (DM), and Kaplan-Shekhtman-Entin-Wohlman-Aharony (KSEA) interactions under a homogeneous magnetic field. Using local quantum uncertainty, we quantify quantum correlations in the thermal state, and measure quantum coherence using l(1) norm and relative entropy of coherence. Our results demonstrate that the nature and behavior of quantum correlations and coherence depend on the parameters of the spin chain and magnetic field. The l(1) norm is shown to provide a more reliable quantification of coherence compared to the relative entropy. We find that quantum correlations and coherence exhibit largely non-oscillatory dynamics. Additionally, depending on the temperature and interaction strengths, both coherence and non-classical correlations can be preserved, and initial mixed states can be transformed into maximally correlated states.
APPLIED PHYSICS B-LASERS AND OPTICS
(2022)
Article
Materials Science, Multidisciplinary
Piotr Kubala, Piotr Sierant, Giovanna Morigi, Jakub Zakrzewski
Summary: The analysis of the extended Bose-Hubbard model with quasiperiodic infinite-range interactions reveals that a significant fraction of eigenstates becomes localized as the strength of the global interactions is increased. The behavior scales differently depending on the choice of the thermodynamic limit. The system is asymptotically ergodic by scaling the interaction strength to keep the energy extensive, while the MBL regime appears to be stable with superextensive scaling of the energy, which can be experimentally verified in cavity quantum electrodynamics setups through quench spectroscopy.
Article
Physics, Multidisciplinary
Benjamin Merkel, Pablo Cova Farina, Andreas Reiserer
Summary: Ensembles of dopants have wide applications in quantum technology, but the miniaturization of corresponding devices is hindered by dipolar interactions. Dynamical decoupling can alleviate the decoherence in crystals with strong anisotropic spin-spin interactions, originating from anisotropic g tensor, but cannot fully eliminate it. These findings can be extended to various quantum systems used for quantum sensing, microwave-to-optical conversion, and quantum memory.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
A. Cipris, N. A. Moreira, T. S. do Espirito Santo, P. Weiss, C. J. Villas-Boas, R. Kaiser, W. Guerin, R. Bachelard
Summary: The study explores subradiance caused by dipole-dipole interactions, where a 200-fold increase in the population of these modes was experimentally demonstrated as the saturation parameter of the driving field is increased. The enhancement in population is attributed to a mechanism similar to optical pumping, while lifetimes are unaffected by pump strength.
PHYSICAL REVIEW LETTERS
(2021)
Article
Astronomy & Astrophysics
Pierre-Marie Gori, Farrokh Vakili, Jean-Pierre Rivet, William Guerin, Mathilde Hugbart, Andrea Chiavassa, Adrien Vakili, Robin Kaiser, Guillaume Labeyrie
Summary: In this study, a new approach is proposed to transform a Cherenkov telescope into the equivalent of an optical telescope, achieving diffraction limited imaging of celestial sources in visible light. By borrowing photonics components from quantum-optical applications, spatial details of observed sources can be recovered, despite the Cherenkov telescope's poor optical quality compared to extremely large optical telescopes.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Physics, Atomic, Molecular & Chemical
Marius Gaudesius, Yong-Chang Zhang, Thomas Pohl, Guillaume Labeyrie, Robin Kaiser
Summary: This study investigates the long-range interactions between cold atoms in a magnetooptical trap and identifies a nonequilibrium steady state for a large number of atoms. The researchers successfully predicted different instability thresholds and regimes using a 3D spatiotemporal model with nonlocal spatial dependencies.
Review
Physics, Multidisciplinary
Quentin Glorieux, Tangui Aladjidi, Paul D. Lett, Robin Kaiser
Summary: Nonlinear optics is a highly active field of research, particularly with the discovery of spectacular phenomena after the invention of lasers. Combining high intensity fields with resonant systems has further enhanced nonlinearity and introduced additional effects related to resonances. This paper reviews a limited range of these effects, focusing on close-to-room-temperature atomic vapors as the nonlinear resonant medium. Four-wave mixing and generation of nonclassical light are discussed, along with one-and two-mode squeezing and photon correlations. Applications for optical and quantum memories based on hot atomic vapors are presented, as well as recent developments in the field of quantum fluids of light.
NEW JOURNAL OF PHYSICS
(2023)
Article
Optics
Pierre Azam, Adam Griffin, Sergey Nazarenko, Robin Kaiser
Summary: By controlling vortex positions in a nonlinear atomic vapor, researchers observed strong interactions leading to vortex dynamics, approaching a pure hydrodynamic regime. They used a wavefront sensor to directly access fluid density and velocity, and developed a relative phase shift method.
Article
Optics
T. Ackemann, G. Labeyrie, A. Costa Boquete, G. Baio, J. G. M. Walker, R. Kaiser, G-L Oppo, G. R. M. Robb
Summary: This study investigates self-organized phases in cold atoms due to light-mediated interactions with the coupling of internal spin degrees of freedom and optomechanical dynamics. The results show that the dominance of magnetic driving or optomechanical driving depends on the lattice periods, with the magnetic driving being stronger for long-period transmission gratings and the optomechanical driving being dominant at small lattice periods.
Article
Optics
Alan C. Santos, Andre Cidrim, Celso Jorge Villas-Boas, Robin Kaiser, Romain Bachelard
Summary: By studying the interaction between two-level atoms through shared vacuum modes, we found that cooperative spontaneous emission leads to the formation of long-lived entangled states at later stages, which are independent of the geometric configuration.
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
G. Labeyrie, J. G. M. Walker, G. R. M. Robb, R. Kaiser, T. Ackemann
Summary: We investigate the interaction between two mechanisms for magnetic self-organization in a cloud of cold rubidium atoms. The transitions between different phases, induced by either a weak transverse magnetic field or laser intensity, are observed and characterized. The experimental observations are successfully compared to numerical simulations based on a spin-1 model.
Article
Optics
M. Gaudesius, Y-C Zhang, T. Pohl, R. Kaiser, G. Labeyrie
Summary: This paper describes the three-dimensional simulation of spatiotemporal instabilities in a magneto-optical trap using a kinetic model. The model shows qualitative agreement with experimentally observed instability thresholds and regimes, providing important insights into the complex mechanism at work.
Article
Optics
N. Cherroret, M. Hemmerling, G. Labeyrie, D. Delande, J. T. M. Walraven, R. Kaiser
Summary: Theoretical exploration reveals that partial counterbalance of decoherence due to thermal motion in a hot atomic vapor can be achieved by working at large laser detuning and using small atomic cells with an elongated geometry, making experimental detection of weak localization within reach.
Article
Physics, Atomic, Molecular & Chemical
Thorsten Ackemann, Guillaume Labeyrie, Giuseppe Baio, Ivor Kresic, Josh G. M. Walker, Adrian Costa Boquete, Paul Griffin, William J. Firth, Robin Kaiser, Gian-Luca Oppo, Gordon R. M. Robb
Summary: This article discusses the self-organization in cold atoms through light-mediated interactions induced by feedback from a single retro-reflecting mirror. It explores the mechanism of formation of self-organized atomic lattices, the coupling strength parameters, and the requirements for critical interaction strength in different scenarios. It also discusses the operating modes on different degrees of freedom, possible research extensions, and connections to other related topics.
Article
Optics
Y. A. Fofanov, I. M. Sokolov, R. Kaiser, W. Guerin
Summary: This study numerically examines the slow decay of fluorescence in motionless atoms after weak pulsed excitation. It reveals that the slow decay rate can be dominated by close pairs of atoms and later by collective many-body effects. The behavior of observables during the decay dynamics is consistent with radiation trapping of nearly resonant light.
Article
Optics
Pierre Azam, Adrien Fusaro, Quentin Fontaine, Josselin Garnier, Alberto Bramati, Antonio Picozzi, Robin Kaiser, Quentin Glorieux, Tom Bienaime
Summary: The study reveals a double shock-collapse instability in a two-dimensional paraxial fluid of light when using a near-resonant laser propagating through hot atomic vapor. This instability is found to result from the combined effect of nonlocal photon-photon interaction and linear photon losses, with dissipation unexpectedly enhancing the collapse instability. Adjustment of atomic vapor temperature controls the nonlocality range of the interaction, which increases significantly with higher atomic density.
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.
