Article
Optics
V. S. Lamego, D. G. Braga, L. S. Oliveira, W. F. Balthazar, J. A. O. Huguenin
Summary: This study investigates partially nonseparable spin-orbit modes by using the degrees of freedom of light to encode qubits and explores different correlations. The concurrence of partially separable modes is directly measured through projective measurement of polarization, showing agreement with quantum theory predictions. Clauser, Horn, Shimony, and Holt (CHSH) inequality is examined, with observed partial violation in agreement with quantum theory expectations. A violation of S = 2.73 +/- 0.03 is achieved for the maximally nonseparable mode.
Article
Astronomy & Astrophysics
Simone Cepollaro, Goffredo Chirco, Gianluca Cuffaro, Vittorio D'Esposito
Summary: We investigate multipartite entanglement for quantum states of 3D space geometry, described via generalized random spin networks with fixed areas, in the context of background independent approaches to quantum gravity. We focus on entanglement negativity as a well defined witness of quantum correlations for mixed states, in our setting describing generic subregions of the boundary of a quantum 3D region of space. When nonlocal bulk entanglement between intertwiners at the vertices is considered the negativity increases, while at the same time the holographic scaling is generally perturbed by the bulk contribution.
Article
Optics
Katarzyna Roszak, Lukasz Cywinski
Summary: This study analyzes the relationship between qubit-environment entanglement and the pure dephasing of qubit in spin-echo protocol. It shows that the echo protocol can counteract both classical environmental noise and qubit-environment entanglement, with no obvious difference in efficiency. The observation of specific features of the echo signal can serve as evidence of the entangling nature of the joint qubit-environment evolution.
Article
Physics, Multidisciplinary
Ze-Guo Chen, Ruo-Yang Zhang, C. T. Chan, Guancong Ma
Summary: This study demonstrates the realization of non-Abelian braiding of multiple degenerate acoustic waveguide modes, exploring the dynamics and geometric phase variations. By switching the order of different braiding processes, the non-Abelian characteristics are revealed.
Article
Chemistry, Multidisciplinary
Michael Berger, Dominik Schulz, Jamal Berakdar
Summary: Quantum scars refer to enhanced localization of probability density of states in spectral regions with high energy levels. The study showed that spin-dependent scarring occurs in spin-coupled electronic systems, which can be detected through transport measurements or spin-polarized scanning tunneling spectroscopy.
Article
Physics, Multidisciplinary
Alireza Seif, Yu-Xin Wang, Aashish A. Clerk
Summary: The study investigates whether dissipation in an open quantum system is truly quantum, and finds that broken time-reversal symmetry is crucial for dissipative entanglement generation. An explicit experimental protocol is proposed to identify truly quantum dephasing dissipation.
PHYSICAL REVIEW LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Chi Zhang, Inhee Lee, Yong Pu, Sergei A. Manuilov, Denis V. Pelekhov, P. Chris Hammel
Summary: The research team demonstrated a high-quality spin-orbit torque nano-oscillator consisting of spin wave modes confined by the strongly inhomogeneous dipole field of a nearby micromagnet. This approach allows for variable spatial confinement and systematic tuning of magnon spectrum and spectral separations to study the impact of multimode interactions on auto-oscillations. The dipole-field-localized spin wave modes exhibit favorable characteristic properties as auto-oscillators, with narrow line width and large amplitude, persisting up to room temperature.
Article
Physics, Multidisciplinary
Kevin T. Geier, Giovanni Martone, Philipp Hauke, Sandro Stringari
Summary: This study proposes observable features for detecting supersolidity in harmonically trapped spin-orbit-coupled Bose-Einstein condensates, and provides signatures of Goldstone modes associated with supersolidity. The system behavior undergoes drastic changes at the critical Raman coupling, with distinctive axial breathing oscillations observed above the transition.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
Celia Griffet, Tobias Haas, Nicolas J. Cerf
Summary: We present measurement schemes for assessing separability criteria for continuous-variable bipartite quantum systems. These schemes require only a handful of measurements and can efficiently detect entanglement, with moderate influence from typical experimental imperfections.
Article
Chemistry, Multidisciplinary
Gerald Q. Yan, Senlei Li, Hanyi Lu, Mengqi Huang, Yuxuan Xiao, Luke Wernert, Jeffrey A. Brock, Eric E. Fullerton, Hua Chen, Hailong Wang, Chunhui Rita Du
Summary: This paper reports on the nanoscale imaging of spin-orbit-torque-induced deterministic magnetic switching and chiral spin rotation in non-collinear antiferromagnet Mn3Sn films using nitrogen-vacancy (NV) centers. Direct evidence of the off-resonance dipole-dipole coupling between the spin dynamics in Mn3Sn and proximate NV centers is also demonstrated by NV relaxometry measurements.
ADVANCED MATERIALS
(2022)
Article
Physics, Multidisciplinary
Ruslan Salikhov, Igor Ilyakov, Lukas Koerber, Attila Kakay, Rodolfo A. Gallardo, Alexey Ponomaryov, Jan-Christoph Deinert, Thales V. A. G. de Oliveira, Kilian Lenz, Juergen Fassbender, Stefano Bonetti, Olav Hellwig, Juergen Lindner, Sergey Kovalev
Summary: Engineering of spin-orbit interactions in a magnetic multilayered structure enables the coherent generation of spin waves using terahertz radiation, benefiting spintronic device development. By exploiting relativistic spin-orbit torques confined to metal/ferromagnet interfaces, we improve light-matter interaction and successfully excite spin-wave modes with frequencies up to 0.6 THz and wavelengths as short as 6 nm using broadband terahertz radiation. Our results have broad applicability and offer the potential for nanoscale control of high-frequency signals.
Article
Quantum Science & Technology
Junxu Li, Manas Sajjan, Sumit Suresh Kale, Sabre Kais
Summary: This report proposes an experimental scheme to study the possible influence of quantum entanglement on the angular features of product distribution in a chemical reaction. The study aims to examine the relationship between quantum entanglement and spin-orbit interaction. The attainable results will be numerically simulated to highlight specific patterns corresponding to various possibilities, potentially providing unforeseen mechanistic insight into analogous reactions.
ADVANCED QUANTUM TECHNOLOGIES
(2021)
Article
Optics
Anne Weber, Birger Boening, Bjoern Minneker, Stephan Fritzsche
Summary: High-harmonic generation from an atomic gas target driven by a bi-elliptical orthogonal two-color laser beam can manipulate the polarization properties of the radiation. Theoretical analysis within the strong-field approximation and a quantum-orbit approach allows for a complete description of the geometry of the elliptically polarized harmonic radiation. The understanding of this process will aid in generating highly energetic radiation with complex polarization properties on the tabletop.
Article
Physics, Multidisciplinary
U. Bhattacharya, Th Lamprou, A. S. Maxwell, A. Ordonez, E. Pisanty, J. Rivera-Dean, P. Stammer, M. F. Ciappina, M. Lewenstein, P. Tzallas
Summary: Strong laser field physics and quantum optics have been recently connected. Studies have shown that intense laser-matter interactions can generate controllable entangled and non-classical light states, opening up new research areas in these fields.
REPORTS ON PROGRESS IN PHYSICS
(2023)
Article
Optics
Fengqiu Adam Dong, Wen Qi Zhang, Shaghik Atakaramians, Shahraam Afshar
Summary: Nonreciprocity in optical fibers opens up new possibilities for quantum computing and quantum photonics. This study explores the chiral properties of radiation modes in optical fibers and discovers specific transverse spin angular momenta associated with whispering gallery mode resonances. Through spin-momentum locking, nonreciprocity in the emission coupling of atomic transitions into forward and backward propagating modes is observed and optimized. The findings demonstrate the rich physics and potential applications of fiber radiation modes in light-matter interactions.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Physics, Multidisciplinary
A. G. de Oliveira, M. F. Z. Arruda, W. C. Soares, S. P. Walborn, A. Z. Khoury, A. Kanaan, P. H. Souto Ribeiro, R. Medeiros de Araujo
BRAZILIAN JOURNAL OF PHYSICS
(2019)
Article
Optics
R. F. Barros, G. B. Alves, D. S. Tasca, C. E. R. Souza, A. Z. Khoury
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2019)
Article
Physics, Multidisciplinary
B. Pinheiro da Silva, V. A. Pinillos, D. S. Tasca, L. E. Oxman, A. Z. Khoury
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Applied
B. Melo, I Brandao, B. Pinheiro da Silva, R. B. Rodrigues, A. Z. Khoury, T. Guerreiro
PHYSICAL REVIEW APPLIED
(2020)
Article
Nanoscience & Nanotechnology
Braian Pinheiro da Silva, Wagner T. Buono, Leonardo J. Pereira, Daniel S. Tasca, Kaled Dechoum, Antonio Z. Khoury
Summary: In this study, the transfer of angular momentum between spin and orbital degrees of freedom in structured light beams during frequency upconversion is demonstrated. The experimental results align well with the theoretical predictions for the nonlinear optical response.
Article
Optics
M. R. Maia, D. Jonathan, T. R. de Oliveira, A. Z. Khoury, D. S. Tasca
Summary: Interference is a mechanism to structure waves into fascinating patterns, playing a crucial role in sensing, imaging, trapping, and fundamental research. This study shows how to structure light into distributions with collapse and revival structures in its wavefront using coherent optical fields as probes.
Article
Multidisciplinary Sciences
Martin Luttmann, Mekha Vimal, Matthieu Guer, Hergott Jean-Francois, Antonio Z. Khoury, Carlos Hernandez-Garcia, Emilio Pisanty, Thierry Ruchon
Summary: Symmetries and conservation laws of energy, linear momentum, and angular momentum are important in nonlinear optics. Recently, there has been interest in paraxial light fields with nontrivial topology. These light fields, despite not being eigenstates of orbital and spin angular momenta, are eigenstates of the generalized angular momentum (GAM) operator, which is a mixture of the orbital and spin angular momentum operators with fractional eigenvalues. By using a polarization Mobius strip with a half-integer GAM charge, we demonstrate the linear scaling of GAM with harmonic order in high harmonic generation, with each harmonic carrying a precise half-integer GAM charge. Our work suggests that GAM is an appropriate quantum number in certain situations, paving the way for further manipulation and application of light beams with fractional-order polarization singularities.
Article
Optics
D. Martinez-Tibaduiza, C. Gonzalez-Arciniegas, C. Farina, A. Cavalcanti-Duriez, A. Z. Khoury
Summary: Using the Wei-Norman theory, a time-dependent complex Riccati equation is obtained as the solution for the time evolution operator of quantum systems with time-dependent Hamiltonians. The TDCRE is solved recursively as generalized continued fractions, and the conditions for unitarity are established. The symmetry of quantum systems can be recognized through the TDCRE, allowing for the association of effective quantum Hamiltonians.
Article
Optics
A. C. Duriez, D. Martinez-Tibaduiza, A. Z. Khoury
Summary: Algebraic methods are used to investigate the performance of quantum thermal machines. The thermodynamic properties of an Otto cycle engine composed of two coupled qubits are examined, with different temperature and frequency settings analyzed to determine the corresponding operation modes. The efficiency is compared between weak and strong coupling regimes.
Article
Optics
M. H. M. Passos, A. de Oliveira Junior, M. C. de Oliveira, A. Z. Khoury, J. A. O. Huguenin
Article
Optics
H. M. Faria, K. Dechoum, A. Z. Khoury
Article
Optics
Antonio Z. Khoury, Paulo H. Souto Ribeiro, Kaled Dechoum
Article
Optics
W. T. Buono, A. Santos, M. R. Maia, L. J. Pereira, D. S. Tasca, K. Dechoum, T. Ruchon, A. Z. Khoury
Article
Optics
B. Pinheiro da Silva, D. S. Tasca, E. F. Galvao, A. Z. Khoury
Article
Optics
R. A. Ribeiro, A. A. Matoso, L. E. Oxman, A. Z. Khoury, S. Padua
