Article
Optics
Thomas Dittrich, Oscar Rodriguez, Carlos Viviescas
Summary: Spin measurement is investigated as the continuous time evolution of the spin in interaction with an environment representing the meter and the apparatus. Numerical simulations reveal the behavior of the spin when interacting with a heat bath, leading to the collapse of the wave function. The final states exhibit quantum randomness and can be correlated with the initial states of the environment.
Article
Physics, Multidisciplinary
Durga Bhaktavatsala Rao Dasari
Summary: We use exact calculations to analyze the thermodynamical effects of depolarizing a zero-temperature quantum spin-bath with a quantum probe coupled to an infinite temperature bath. The induced correlations in the bath during the depolarizing process prevent the bath's entropy from increasing to its maximum limit, but the energy deposited in the bath can be extracted completely in a finite time. We investigate these findings using a solvable central spin model, demonstrating that destroying unwanted correlations enhances the rate of energy extraction and entropy towards their limiting values. These studies have implications for quantum battery research, particularly in understanding battery performance during charging and discharging processes.
Article
Optics
Nilanjana Chanda, Rangeet Bhattacharyya
Summary: This paper presents that drive-induced dissipation in an open quantum system can lead to the Born rule, even without a separate apparatus involved. The study suggests that the drive needs to be much stronger than the system-environment coupling, allowing the dynamics of the system to be simplified into a specific form, resulting in the same mixed state as obtained using the Born rule.
Article
Physics, Multidisciplinary
Alberto Mercurio, Shilan Abo, Fabio Mauceri, Enrico Russo, Vincenzo Macri, Adam Miranowicz, Salvatore Savasta, Omar Di Stefano
Summary: Pure dephasing is important for both spectroscopy and quantum information technology, and often leads to decay of quantum correlations. We investigate how pure dephasing of one component of a hybrid quantum system affects the dephasing rate of system transitions. We find that the interaction in a light-matter system significantly affects the stochastic perturbation describing the dephasing of a subsystem, depending on the gauge adopted.
PHYSICAL REVIEW LETTERS
(2023)
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
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
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
Materials Science, Multidisciplinary
Shaojie Xiong, Rui Zhang, Bo Liu, Wangjun Lu, Zhe Sun, Xiaoguang Wang
Summary: Distilling quantum coherence is essential for optimizing quantum technologies, but it is not always guaranteed. Thus, probabilistic distillation of quantum coherence has been developed and successfully implemented. We propose a scheme to achieve one-shot coherence distillation in a superconducting circuit system. By using appropriate incoherent operations, the target maximally coherent state can be extracted from a single prepared state with a finite error tolerance. Our scheme is easy to implement in experiments, requiring only a superconducting qubit as the auxiliary system. Numerical simulations under typical experimental conditions show that the distillation rate of coherence resource can be well achieved with current techniques.
RESULTS IN PHYSICS
(2023)
Article
Physics, Multidisciplinary
Francois Gay-Balmaz, Cesare Tronci
Summary: A fully Hamiltonian theory of quantum-classical spin dynamics is proposed, which ensures a series of consistency properties and satisfies Heisenberg's uncertainty principle. The theory models the interaction between a classical Bloch vector and a quantum spin observable, and can be extended to systems with multiple spins and orbital degrees of freedom.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2023)
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
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
Quantum Science & Technology
Lionel Tenemeza Kenfack, William Degaulle Waladi Gueagni, Martin Tchoffo, Lukong Cornelius Fai
Summary: The estimation of temperature in a thermal XY spin-chain can be improved by adjusting the coupling strength between the probe and the bath as well as the bath spins. Optimal precision is achieved when these coupling strengths are equal, allowing for a long-time interaction between the probe and the bath.
QUANTUM INFORMATION PROCESSING
(2021)
Article
Physics, Multidisciplinary
Walter Hahn, V. V. Dobrovitski
Summary: Long-lived coherences emerge under periodic pulse driving in disordered ensembles of strongly interacting spins, with potential for future quantum technologies. The physical origin and properties of this phenomenon remain poorly understood, but are found to exist in ensembles of different dimensionalities, from two-dimensional to infinite-dimensional systems. The transition between dimensions shows qualitatively similar long-time coherence dynamics, with dimensionality-dependent singularity in short-time behavior. The common physical origin of long-lived coherences is suggested to be a generic feature of strongly coupled spin systems with positional disorder. These results lay the foundation for utilizing long-lived coherences in various applications, ranging from quantum sensing to quantum information processing.
NEW JOURNAL OF PHYSICS
(2021)
Article
Physics, Multidisciplinary
V. V. Belykh, A. R. Korotneva, D. R. Yakovlev
Summary: By simultaneously applying a radio frequency field and periodic optical pulses, this study successfully addresses the issue of inhomogeneity and fluctuating environment affecting the coherence time of an electron spin ensemble. The research resulted in a 50-Hz-narrow electron spin resonance with milliseconds-long T-2 in Ce3+ ions, paving the way for coherent optical manipulation in spin systems decoupled from their inhomogeneous environment.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
A. Hijano, E. J. Rodriguez, D. Bercioux, D. Frustaglia
Summary: This work investigates the response of spin carriers to effective field textures in curved one-dimensional interferometric circuits, finding that the interplay between Rashba and Dresselhaus spin-orbit interactions and circuit geometry modifies the geometric characteristics of spinors, resulting in the localization of electronic wave function and suppression of quantum conductance.
COMMUNICATIONS PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Roberto Lo Nardo, Gary Wolfowicz, Stephanie Simmons, Alexei M. Tyryshkin, Helge Riemann, Nikolai V. Abrosimov, Peter Becker, Hans-Joachim Pohl, Michael Steger, Stephen A. Lyon, Mike L. W. Thewalt, John J. L. Morton
Article
Materials Science, Multidisciplinary
Wen-Long Ma, Gary Wolfowicz, Shu-Shen Li, John J. L. Morton, Ren-Bao Liu
Article
Materials Science, Multidisciplinary
R. Guichard, S. J. Balian, G. Wolfowicz, P. A. Mortemousque, T. S. Monteiro
Article
Physics, Multidisciplinary
Gary Wolfowicz, Hannes Maier-Flaig, Robert Marino, Alban Ferrier, Herve Vezin, John J. L. Morton, Philippe Goldner
PHYSICAL REVIEW LETTERS
(2015)
Article
Physics, Multidisciplinary
Gary Wolfowicz, Pierre-Andre Mortemousque, Roland Guichard, Stephanie Simmons, Mike L. W. Thewalt, Kohei M. Itoh, John J. L. Morton
NEW JOURNAL OF PHYSICS
(2016)
Article
Nanoscience & Nanotechnology
Gary Wolfowicz, Alexei M. Tyryshkin, Richard E. George, Helge Riemann, Nikolai V. Abrosimov, Peter Becker, Hans-Joachim Pohl, Mike L. W. Thewalt, Stephen A. Lyon, John J. L. Morton
NATURE NANOTECHNOLOGY
(2013)
Article
Materials Science, Multidisciplinary
Gary Wolfowicz, Stephanie Simmons, Alexei M. Tyryshkin, Richard E. George, Helge Riemann, Nikolai V. Abrosimov, Peter Becker, Hans-Joachim Pohl, Stephen A. Lyon, Mike L. W. Thewalt, John J. L. Morton
Article
Materials Science, Multidisciplinary
Giuseppe Pica, Gary Wolfowicz, Matias Urdampilleta, Mike L. W. Thewalt, Helge Riemann, Nikolai V. Abrosimov, Peter Becker, Hans-Joachim Pohl, John J. L. Morton, R. N. Bhatt, S. A. Lyon, Brendon W. Lovett
Article
Physics, Multidisciplinary
Gary Wolfowicz, Matias Urdampilleta, Mike L. W. Thewalt, Helge Riemann, Nikolai V. Abrosimov, Peter Becker, Hans-Joachim Pohl, John J. L. Morton
PHYSICAL REVIEW LETTERS
(2014)
Article
Multidisciplinary Sciences
Wen-Long Ma, Gary Wolfowicz, Nan Zhao, Shu-Shen Li, John J. L. Morton, Ren-Bao Liu
NATURE COMMUNICATIONS
(2014)