Probing Lorentz-invariance-violation-induced nonthermal Unruh effect in quasi-two-dimensional dipolar condensates

Tian, Zehua; Wu, Longhao; Zhang, Liang; Jing, Jiliang; Du, Jiangfeng

doi:10.1103/physrevd.106.l061701

Cited by 9 publications

(3 citation statements)

References 111 publications

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“…As the height field δh is proportional to the time derivative of the velocity potential ϕ of the superfluid (7), we rewrite this PSD as…”

Section: Uniform Circular Motion Responsementioning

confidence: 99%

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Third sound detectors in accelerated motion

Bunney,

Barroso,

Biermann

et al. 2024

New J. Phys.

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An accelerated observer moving through empty space sees particles appearing and disappearing, while an observer with a constant velocity does not register any particles. This phenomenon, generally known as the Unruh effect, relies on an initial vacuum state, thereby unifying the experience of all inertial observers. We propose an experiment to probe this observer-dependent detector response, using a laser beam in circular motion as a local detector of superfluid helium-4 surface modes or third sound waves. To assess experimental feasibility, we develop a theoretical framework to include a non-zero temperature initial state. We find that an acceleration-dependent signal persists, independent of the initial temperature. By introducing a signal-to-noise measure we show that observing this signal is within experimental reach.

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“…As the height field δh is proportional to the time derivative of the velocity potential ϕ of the superfluid (7), we rewrite this PSD as…”

Section: Uniform Circular Motion Responsementioning

confidence: 99%

“…An accelerated particle detector on a circular trajectory can be constructed using a localised laser beam interacting with an ultracold atoms system [5,6] or by the inclusion of an impurity atom [7]. In previous experimental proposals using atomic clouds, the sample temperature could be ignored.…”

Section: Introductionmentioning

confidence: 99%

Third sound detectors in accelerated motion

Bunney,

Barroso,

Biermann

et al. 2024

New J. Phys.

View full text Add to dashboard Cite

show abstract

“…On the experimental side, we have witnessed remarkable advancements, such as gravitational wave detections produced by LIGO and Virgo [1][2][3][4], as well as high-energy particle collisions at the LHC [5][6][7]. On the theoretical side, the study of Lorentz symmetry breaking (LSB) is important for understanding quantum gravity processes in fundamental physics [8][9][10][11][12][13][14]. By investigating the low-energy contributions from Lorentz symmetry breaking, especially its impact on spacetime, and analyzing high-precision experimental data, we can explore the possibility of Lorentz symmetry breaking in spacetimes compared to general relativity (GR).…”

mentioning

confidence: 99%

Zhuzhou Haichuan Industrial Co., Ltd. v. Changsha Cai'e Subbranch of Bank of China Limited, Hunan Deyihong Metal Materials Co., Ltd.

Liu

2022

Library of Selected Cases From the Chinese Court

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The Kalb-Ramond (KR) gravity theory, a modified gravity theory that nonminimally couples a KR field with a nonzero vacuum expectation value for the gravitational field, can spontaneously break the Lorentz symmetry of gravity. In a recent work, Yang et al. [Phys. Rev. D 108, 124004 (2023)] successfully derived Schwarzschild-like black hole solutions both with and without a nonzero cosmological constant within the framework of KR gravity. However, their analysis did not address the more general case of static, neutral, spherically symmetric black holes. In this paper, we fill this gap by resolving the field equations to construct more general static, neutral, spherically symmetric black hole solutions both with and without a nonzero cosmological constant. Our black hole solutions are shown to obey the first law and the Bekenstein-Smarr mass formulas of black hole thermodynamics. Moreover, we demonstrate that our static neutral spherically symmetric AdS black hole does not always satisfy the reverse isoperimetric inequality (RII), as the isoperimetric ratio can be larger or smaller than unity depending on the placement of the solution parameters within the parameter space. This behavior contrasts with the above-mentioned Schwarzschild-like AdS black hole in the KR gravity theory, which always obeys the RII. Significantly, the present more general static, neutral, spherically symmetric AdS black hole is the first example of a static AdS black hole that can violate the RII.

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Does Hawking effect always degrade fidelity of quantum teleportation in Schwarzschild spacetime?

Wu,

Fan,

Wang

et al. 2023

J. High Energ. Phys.

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Previous studies have shown that the Hawking effect always destroys quantum correlations and the fidelity of quantum teleportation in the Schwarzschild black hole. Here, we investigate the fidelity of quantum teleportation of Dirac fields between users in Schwarzschild spacetime. We find that, with the increase of the Hawking temperature, the fidelity of quantum teleportation can monotonically increase, monotonically decrease, or non-monotonically increase, depending on the choice of the initial state, which means that the Hawking effect can create net fidelity of quantum teleportation. This striking result banishes the extended belief that the Hawking effect of the black hole can only destroy the fidelity of quantum teleportation. We also find that quantum steering cannot fully guarantee the fidelity of quantum teleportation in Schwarzschild spacetime. This new unexpected source may provide a new idea for the experimental evidence of the Hawking effect.

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Probing Lorentz-invariance-violation-induced nonthermal Unruh effect in quasi-two-dimensional dipolar condensates

Cited by 9 publications

References 111 publications

Third sound detectors in accelerated motion

Third sound detectors in accelerated motion

Zhuzhou Haichuan Industrial Co., Ltd. v. Changsha Cai'e Subbranch of Bank of China Limited, Hunan Deyihong Metal Materials Co., Ltd.

Does Hawking effect always degrade fidelity of quantum teleportation in Schwarzschild spacetime?

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