Quantum to classical transition induced by gravitational time dilation

Sokolov, Boris; Vilja, Iiro; Maniscalco, Sabrina

doi:10.1103/physreva.96.012126

Cited by 8 publications

(6 citation statements)

References 28 publications

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“…We focus on dephasing, or pure decoherence, which is an ubiquitous mechanism leading to a loss of quantum properties and degrading the performance of quantum computers [15]. Indeed, dephasing appears naturally in multiple physical systems and processes including qubit coupled to harmonic oscillators in thermal equilibrium [1], central spin coupled to Ising chain in transverse field [16], excitons in quantum dots [17,18], superconducting qubits influenced by fluctuating magnetic dipoles [19], and particles in a spatial superposition in gravitational field [20,21] -to name few examples.…”

Section: Introductionmentioning

confidence: 99%

Experimental implementation of fully controlled dephasing dynamics and synthetic spectral densities

et al. 2018

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Engineering, controlling, and simulating quantum dynamics is a strenuous task. However, these techniques are crucial to develop quantum technologies, preserve quantum properties, and engineer decoherence. Earlier results have demonstrated reservoir engineering, construction of a quantum simulator for Markovian open systems, and controlled transition from Markovian to non-Markovian regime. Dephasing is an ubiquitous mechanism to degrade the performance of quantum computers. However, all-purpose quantum simulator for generic dephasing is still missing. Here, we demonstrate full experimental control of dephasing allowing us to implement arbitrary decoherence dynamics of a qubit. As examples, we use a photon to simulate the dynamics of a qubit coupled to an Ising chain in a transverse field and also demonstrate a simulation of nonpositive dynamical map. Our platform opens the possibility to simulate dephasing of any physical system and study fundamental questions on open quantum systems.

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Section: Introductionmentioning

confidence: 99%

Experimental implementation of fully controlled dephasing dynamics and synthetic spectral densities

et al. 2018

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“…Within our weak gravitation approximation, the electromagnetic wave (14), (19) will not lose transversality: (21) as expected for the approximation of geometrical optics.…”

Section: B the Perturbed Maxwell Equationsmentioning

confidence: 67%

“…To describe the spontaneous emission process, let us quantize the field in a standard way: by replacing complex modal amplitudes in Eqs. (14) and (19) by bosonic creation and annihilation operators. Then, following Ref.…”

Section: The Field Hamiltonianmentioning

confidence: 99%

Gravitational dephasing in spontaneous emission of atomic ensembles in timed Dicke states

Stefanov¹,

Siutsou²,

Mogilevtsev³

2020

Phys. Rev. D

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Here we discuss an effect of gravitational decoherence due to time dilation on the collective radiation dynamics of atomic system in timed single-photon Dicke states. We show that a photon absorbed by the stationary system of randomly placed stationary atoms is no more spontaneously emitted in the direction of the impinging photon. Time-dilation effect leads to broadening of the angular distribution of the emitted photon. Even for the spherically symmetric gravitational field, the broadening has specific non-symmetrical character.

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“…Decoherence is a ubiquitous phenomenon in quantum systems and it has been understood to play a fundamental role (a) E-mail: irismarpaz@ufpi.edu.br (corresponding author) in conceptual foundations of quantum-to-classical transitions as first studied by Zeh [3] 50 years ago. Building upon the ideas put forth by Zeh, the concept was subsequently expanded and implemented by Zurek [4][5][6][7][8][9][10], with applications extended to various systems [11,12]. In the double-slit experiment, if the environment interacts with the particle in a way that causes decoherence, the interference pattern disappears and the particle behaves classically [13].…”

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confidence: 99%

Open quantum behaviour manifested in the double-slit experiment

Marinho,

de Sá Neto,

Sampaio

et al. 2023

EPL

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In certain analyses of quantum systems, it is common to disregard the dissipation eﬀect and focus solely on decoherence. This is because decoherence typically occurs on a much shorter timescale compared to dissipation. However, in order to gain insight into the role of dissipation, we examine the interference pattern in a double-slit experiment while considering both eﬀects. To do so, we establish time scales for decoherence and dissipation and acknowledge the possibility of these eﬀects occurring in close proximity. By comparing the relative intensity and fringe visibility between a purely decoherent model and a model that incorporates both decoherence and dissipation, we make an observation. When the time scales of decoherence and dissipation are similar, there exists a time interval during propagation where dissipation contributes to the faster degradation of quantum features compared to the sole inﬂuence of decoherence. Hence, it is crucial to consider both decoherence and dissipation eﬀects, especially when their time scales are closely aligned, to gain a comprehensive understanding of quantum behavior.

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Quantum to classical transition induced by gravitational time dilation

Cited by 8 publications

References 28 publications

Experimental implementation of fully controlled dephasing dynamics and synthetic spectral densities

Experimental implementation of fully controlled dephasing dynamics and synthetic spectral densities

Gravitational dephasing in spontaneous emission of atomic ensembles in timed Dicke states

Open quantum behaviour manifested in the double-slit experiment

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