Characterization of Dephasing and Dissipating Effects in Hybrid Quantum Systems

2020 ◽  
Author(s):  
Jiří Svozilík ◽  
Raúl Hidalgo-Sacoto ◽  
Ievgen I. Arkhipov
Keyword(s):  
Quantum Systems ◽  
Hybrid Quantum Systems

scholarly journals Universal non-Markovianity detection in hybrid open quantum systems

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Jiří Svozilík ◽  
Raúl Hidalgo-Sacoto ◽  
Ievgen I. Arkhipov
Keyword(s):  
Quantum System ◽  
Wigner Function ◽  
Open Quantum Systems ◽  
Quantum Correlations ◽  
Quantum Systems ◽  
Continuous Variables ◽  
Open Quantum ◽  
Hybrid Quantum Systems

Abstract A universal characterization of non-Markovianity for any open hybrid quantum systems is presented. This formulation is based on the negativity volume of the generalized Wigner function, which serves as an indicator of the quantum correlations in any composite quantum systems. It is shown, that the proposed measure can be utilized for any single or multi-partite quantum system, containing any discrete or continuous variables. To demonstrate its power in revealing non-Markovianity in such quantum systems, we additionally consider a few illustrative examples.

Absorption of magnons in dispersively coupled hybrid quantum systems

2021 ◽  
Vol 103 (6) ◽  
Author(s):  
Zeng-Xing Liu ◽  
Hao Xiong ◽  
Mu-Ying Wu ◽  
Yong-qing Li
Keyword(s):  
Quantum Systems ◽  
Hybrid Quantum Systems

Separability criteria based on the Bloch representation of density matrices

2007 ◽  
Vol 7 (7) ◽  
pp. 624-638
Author(s):  
J. de Vicente
Keyword(s):  
Sufficient Conditions ◽  
Quantum Systems ◽  
Necessary Condition ◽  
Sufficient Condition ◽  
Pure Product ◽  
Separability Problem ◽  
Arbitrary Dimensions ◽  
Necessary And Sufficient ◽  
Bloch Representation

We study the separability of bipartite quantum systems in arbitrary dimensions using the Bloch representation of their density matrix. This approach enables us to find an alternative characterization of the separability problem, from which we derive a necessary condition and sufficient conditions for separability. For a certain class of states the necessary condition and a sufficient condition turn out to be equivalent, therefore yielding a necessary and sufficient condition. The proofs of the sufficient conditions are constructive, thus providing decompositions in pure product states for the states that satisfy them. We provide examples that show the ability of these conditions to detect entanglement. In particular, the necessary condition is proved to be strong enough to detect bound entangled states.

scholarly journals Coherent acoustic control of a single silicon vacancy spin in diamond

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Smarak Maity ◽  
Linbo Shao ◽  
Stefan Bogdanović ◽  
Srujan Meesala ◽  
Young-Ik Sohn ◽  
...  
Keyword(s):  
Quantum Systems ◽  
Phonon Coupling ◽  
Single Spin ◽  
Silicon Vacancy ◽  
Acoustic Control ◽  
State Point ◽  
Hybrid Quantum Systems ◽  
Universal Quantum ◽  
Vacancy Center ◽  
Strong Spin

AbstractPhonons are considered to be universal quantum transducers due to their ability to couple to a wide variety of quantum systems. Among these systems, solid-state point defect spins are known for being long-lived optically accessible quantum memories. Recently, it has been shown that inversion-symmetric defects in diamond, such as the negatively charged silicon vacancy center (SiV), feature spin qubits that are highly susceptible to strain. Here, we leverage this strain response to achieve coherent and low-power acoustic control of a single SiV spin, and perform acoustically driven Ramsey interferometry of a single spin. Our results demonstrate an efficient method of spin control for these systems, offering a path towards strong spin-phonon coupling and phonon-mediated hybrid quantum systems.

scholarly journals Publisher's Note: “Loop-gap microwave resonator for hybrid quantum systems” [Appl. Phys. Lett. 112, 204102 (2018)]

2018 ◽  
Vol 113 (3) ◽  
pp. 039903
Author(s):  
Jason R. Ball ◽  
Yu Yamashiro ◽  
Hitoshi Sumiya ◽  
Shinobu Onoda ◽  
Takeshi Ohshima ◽  
...  
Keyword(s):  
Quantum Systems ◽  
Microwave Resonator ◽  
Hybrid Quantum Systems

scholarly journals Quantum technologies with hybrid systems

2015 ◽  
Vol 112 (13) ◽  
pp. 3866-3873 ◽  
Author(s):  
Gershon Kurizki ◽  
Patrice Bertet ◽  
Yuimaru Kubo ◽  
Klaus Mølmer ◽  
David Petrosyan ◽  
...  
Keyword(s):  
Quantum Information ◽  
Secure Communication ◽  
Quantum Information Processing ◽  
Quantum Systems ◽  
Quantum States ◽  
Current Direction ◽  
Ongoing Effort ◽  
Hybrid Quantum Systems ◽  
Physical Components

An extensively pursued current direction of research in physics aims at the development of practical technologies that exploit the effects of quantum mechanics. As part of this ongoing effort, devices for quantum information processing, secure communication, and high-precision sensing are being implemented with diverse systems, ranging from photons, atoms, and spins to mesoscopic superconducting and nanomechanical structures. Their physical properties make some of these systems better suited than others for specific tasks; thus, photons are well suited for transmitting quantum information, weakly interacting spins can serve as long-lived quantum memories, and superconducting elements can rapidly process information encoded in their quantum states. A central goal of the envisaged quantum technologies is to develop devices that can simultaneously perform several of these tasks, namely, reliably store, process, and transmit quantum information. Hybrid quantum systems composed of different physical components with complementary functionalities may provide precisely such multitasking capabilities. This article reviews some of the driving theoretical ideas and first experimental realizations of hybrid quantum systems and the opportunities and challenges they present and offers a glance at the near- and long-term perspectives of this fascinating and rapidly expanding field.

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