Using coherent feedback loop for high quantum state transfer in optomechanics

Amazioug, M.; Maroufi, B.; Daoud, Mohammed

doi:10.1016/j.physleta.2020.126705

Cited by 14 publications

(3 citation statements)

References 51 publications

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“…is the modified cavity decay rate and ∆ f b = ∆ a + 2γ a τ sin β is the effective detuning with ∆ a = ω a − ω 0 are respectively the effective cavity decay rate and the detuning with Here, the quantities ψ, τ denote the transmission and reflection coefficients respectively and β describes the phase shift generated by the reflectivity of the output field on the mirrors [52]. The operator a in f b describes the effective input noise operator in the presence of coherent feedback and corresponding description is based on input-output theory [53].…”

Section: Modelmentioning

confidence: 99%

Coherent feedback control of quantum correlations in cavity magnomechanical system with magnon squeezing

M.¹,

K.²,

Teklu³

et al. 2023

Preprint

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We address a scheme to enhance the quantum correlations in cavity opto-magnomechanical system by using the coherent feedback loop in the presence of magnon squeezing. The proposed coherent feedback-control allows a significant enhancement of the entanglement of three bipartite subsystems, i.e., photon-phonon, photonmagnon and phonon-magnon. We also study the Einstein-Podolsky-Rosen steering and one-way steering in the presence of thermal effects without imposing additional conditions of asymmetric losses or noises in the subsystems. Furthermore, we investigate the sensitiveness of the scheme to the magnon squeezing, and its performance in non-ideal situations in which losses and noises are taken into account.

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Section: Modelmentioning

confidence: 99%

Coherent feedback control of quantum correlations in cavity magnomechanical system with magnon squeezing

M.¹,

K.²,

Teklu³

et al. 2023

Preprint

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“…To our understanding, measurement feedback control has been studied intensively and well recorded in [5], [202], and [203]. In contrast, coherent feedback control is still a bit new to many researchers in the quantum control community, though it has advantages in many applications [204,1,205,206,207,208,209,210,211,212,213,214,215,25,216,217,218,219,34,9,8,220,221,222,223,224,10,225,50,11,29,30,226,227,228,229,230]. Thus, in this section, we describe briefly linear quantum coherent feedback networks and use a recent experiment as demonstration.…”

Section: Feedback Control Of Quantum Linear Systemsmentioning

confidence: 99%

Linear quantum systems: a tutorial

Zhou¹

2022

Preprint

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The purpose of this tutorial is to give a brief introduction to linear quantum control systems. The mathematical model of linear quantum control systems is presented first, then some fundamental control-theoretic notions such as stability, controllability and observability are given, which are closely related to several important concepts in quantum information science such as decoherence-free subsystems, quantum nondemolition variables, and back-action evasion measurements. After that, quantum Gaussian states are introduced, in particular, an information-theoretic uncertainty relation is presented which often gives a better bound for mixed Gaussian states than the well-known Heisenberg uncertainty relation. The quantum Kalman filter is presented for quantum linear systems, which is the quantum analogy of the Kalman filter for classical (namely, non-quantum-mechanical) linear systems. The quantum Kalman canonical decomposition for quantum linear systems is recorded, and its application is illustrated by means of a recent experiment. As single-and multi-photon states are useful resources in quantum information technology, the response of quantum linear systems to these types of input is presented. Finally, coherent feedback control of quantum linear systems is briefly introduced, and a recent experiment is used to demonstrate the effectiveness of quantum linear systems and networks theory.

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“…The cavity is also driven by an electromagnetic field through an asymmetric beam splitter (BS) with amplitude ψE . We denote the transmission and reflection coefficients by ψ and τ respectively, and the phase shift generated by the reflectivity of the output field on the mirrors by β [44,59]. The photons and magnons of the cavity are coupled by dipole magnetic interaction, and the magnons and phonons are coupled by magnetostrictive interaction.…”

Section: Introductionmentioning

confidence: 99%

Feedback Control of Quantum Correlations in a Cavity Magnomechanical System with Magnon Squeezing

Amazioug,

Singh,

Teklu

et al. 2023

Entropy

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We suggest a method to improve quantum correlations in cavity magnomechanics, through the use of a coherent feedback loop and magnon squeezing. The entanglement of three bipartition subsystems: photon-phonon, photon-magnon, and phonon-magnon, is significantly improved by the coherent feedback-control method that has been proposed. In addition, we investigate Einstein-Podolsky-Rosen steering under thermal effects in each of the subsystems. We also evaluate the scheme’s performance and sensitivity to magnon squeezing. Furthermore, we study the comparison between entanglement and Gaussian quantum discord in both steady and dynamical states.

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Using coherent feedback loop for high quantum state transfer in optomechanics

Cited by 14 publications

References 51 publications

Coherent feedback control of quantum correlations in cavity magnomechanical system with magnon squeezing

Coherent feedback control of quantum correlations in cavity magnomechanical system with magnon squeezing

Linear quantum systems: a tutorial

Feedback Control of Quantum Correlations in a Cavity Magnomechanical System with Magnon Squeezing

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