Distribution and Evolution of Quantum Coherence for Open Multi‐Qubit Systems in Non‐Inertial Frames

Zeng, Hao‐Sheng; Cao, Hui-Min

doi:10.1002/andp.202000606

Cited by 8 publications

(6 citation statements)

References 70 publications

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“…The effect of relativistic motion on quantum coherence has been studied in the following works [62][63][64][65]. In Ref.…”

Section: Introductionmentioning

confidence: 99%

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Accessible and inaccessible quantum coherence in relativistic quantum systems

Harikrishnan,

Jambulingam,

Rohde

et al. 2021

Preprint

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The quantum coherence of a multipartite system is investigated when some of the parties are moving with constant acceleration. Due to relativistic motion the quantum coherence is divided into two parts as accessible and inaccessible coherence. First we investigate tripartite systems, considering both GHZ and W-states. We find that the quantum coherence of these states does not vanish in the limit of infinite acceleration, rather asymptoting to a non-zero value. These results hold for both single-and two-qubit relativistic motion. In the GHZ and W states the coherence is distributed as correlations between the qubits and is known as global coherence. But quantum coherence can also exist due to the superposition within a qubit, the local coherence. To study the properties of local coherence we investigate separable state. The GHZ state, W-state and separable states contain only one type of coherence. Next we consider the W W and star states in which both local and global coherences coexist. We find that under relativistic motion both local and global coherence show similar qualitative behaviour. Finally we derive analytic expressions for the quantum coherence of N -partite GHZ and W states where n < N qubits are subject to relativistic motion. We find that the quantum coherence of a multipartite GHZ state falls exponentially with the number of accelerated qubits, whereas for multipartite W-states the quantum coherence decreases only polynomially. We conclude that W-states are more robust to Unruh decoherence and discuss some potential applications in satellite-based quantum communication and black hole physics.

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“…The effect of relativistic motion on quantum coherence has been studied in the following works [62][63][64][65]. In Ref.…”

Section: Introductionmentioning

confidence: 99%

“…Both these works consider a massless scalar field. The relativistic coherence of a system of Dirac fields was considered in [65]. In our work we consider the modes of a massless scalar field and measure the coherence between different modes as well as the coherence within a mode.…”

Section: Introductionmentioning

confidence: 99%

Accessible and inaccessible quantum coherence in relativistic quantum systems

Harikrishnan,

Jambulingam,

Rohde

et al. 2021

Preprint

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“…Cavity optomechanics has focused a lot of interest on the investigation of coherent coupling between optical and mechanical modes via the radiation pressure of photons trapped inside an optical cavity [1][2][3]. Additionally, in the contemporary era of quantum technology, such cavities have achieved significant advancements, including ultrahigh-precision measurement [4,5], gravitational wave detection [6], quantum information processing [7], quantum teleportation [8,9], nonclassical photon statistics [10][11][12], higher-order sideband generation [13][14][15], optomagnonic frequency combs [16], quantum entanglement [17][18][19], macroscopic quantum coherence [20][21][22], ground state cooling of mechanical oscillator [23,24], and optomechanically induced transparency (OMIT) [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

A rotational-cavity optomechanical system with two revolving cavity mirrors: optical response and fast-slow light mechanism

Sohail¹,

Arif²,

Akhtar³

et al. 2023

Preprint

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We investigate the optical behavior of a single Laguerre-Gaussian cavity optomechanical system consisting of two mechanically rotating mirrors. We explore the effects of various physical parameters on the double optomechanically induced transparency (OMIT) of the system and provide a detailed explanation of the underlying physical mechanism. We show that the momentum is not the cause of the current double-OMIT phenomena; rather, it results from the orbital angular momentum between the optical field and the rotating mirrors. Additionally, the double-OMIT is simply produced using a single Laguerre-Gaussian cavity optomechanical system rather than by integrating many subsystems or adding the atomic medium as in earlier studies. We also investigate the impact of fast and slow light in this system. Finally, we show that the switching between ultrafast and ultraslow light can be realized by adjusting the angular momentum, which is a new source of regulating fast-slow light.

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“…On the other hand, realistic quantum systems inevitably interact with their environments, which also degrade quantum coherence and entanglement of the systems. Recently, influences of different noisy environments on quantum coherence and entanglement for W state in noninertial frames have been investigated intensively [18][19][20][21]. In reference [18], the authors investigated the tripartite entanglement of W and GHZ states under amplitude-damping and depolarizing noisy channels in noninertial frames via π-tangle and negativity.…”

Section: Introductionmentioning

confidence: 99%

“…In reference [18], the authors investigated the tripartite entanglement of W and GHZ states under amplitude-damping and depolarizing noisy channels in noninertial frames via π-tangle and negativity. Zeng and Cao [19] studied evolution and distribution of quantum coherence for multipartite W and GHZ states of Dirac fields under amplitude-damping, phase damping and depolarizing channels in the noninertial frames. Wu et al [20] investigated the quantum coherence for N-partite W and GHZ states under the local amplitude-damping environment when N − 1 observers are accelerated.…”

Section: Introductionmentioning

confidence: 99%

Influences of noisy channels on quantum coherence and entanglement of W state in noninertial frame

Kim¹,

Pak²,

Kye³

et al. 2023

Phys. Scr.

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Via using -norm of quantum coherence and -tangle, we investigate influences of amplitude-damping and depolarizing channels on quantum coherence and entanglement for W state of Dirac fields when two observers are in accelerating motion. We find that quantum entanglement vanishes for all values of acceleration if at least one qubit is under noisy channels. But quantum coherence does not vanish even at infinite acceleration if only one subsystem is under noisy channels. We also find that, unlike the depolarizing environment, the amplitude-damping environment can destroy symmetric properties of quantum entanglement with respect to two accelerated observers. These results will further enrich our understanding on the relation between quantum coherence and entanglement.

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Distribution and Evolution of Quantum Coherence for Open Multi‐Qubit Systems in Non‐Inertial Frames

Cited by 8 publications

References 70 publications

Accessible and inaccessible quantum coherence in relativistic quantum systems

Accessible and inaccessible quantum coherence in relativistic quantum systems

A rotational-cavity optomechanical system with two revolving cavity mirrors: optical response and fast-slow light mechanism

Influences of noisy channels on quantum coherence and entanglement of W state in noninertial frame

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