Related papers: Gravitational decoherence by the apparatus in the quantum-gravity induced entanglement of masses

Gravitational decoherence by the apparatus in the quantum-gravity induced entanglement of masses

URL: http://arxiv.org/abs/2210.16919v2
Date: Wed, 16 Nov 2022 11:37:50 GMT
Title: Gravitational decoherence by the apparatus in the quantum-gravity induced entanglement of masses
Authors: Fabian Gunnink, Anupam Mazumdar, Martine Schut and Marko Toro\v{s}
Abstract summary: Recently there has been a proposal to test the quantum nature of gravity by creating quantum superpositions of two nearby neutral masses. We will consider two light and two heavy quantum oscillators, forming pairs of probe-detector systems. We conclude by estimating the magnitude of the decoherence in the proposed experiment for testing the quantum nature of gravity.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: One of the outstanding questions in modern physics is how to test whether gravity is classical or quantum in a laboratory. Recently there has been a proposal to test the quantum nature of gravity by creating quantum superpositions of two nearby neutral masses, close enough that the quantum nature of gravity can entangle the two quantum systems, but still sufficiently far away that all other known Standard Model interactions remain negligible. However, the mere process of preparing superposition states of a neutral mass (the light system), requires the vicinity of laboratory apparatus (the heavy system). We will suppose that such a heavy system can be modelled as another quantum system; since gravity is universal, the lighter system can get entangled with the heavier system, providing an inherent source of gravitational decoherence. In this paper, we will consider two light and two heavy quantum oscillators, forming pairs of probe-detector systems, and study under what conditions the entanglement between two light systems evades the decoherence induced by the heavy systems. We conclude by estimating the magnitude of the decoherence in the proposed experiment for testing the quantum nature of gravity.

Related papers

Table-top nanodiamond interferometer enabling quantum gravity tests [34.82692226532414]
We present a feasibility study for a table-top nanodiamond-based interferometer. By relying on quantum superpositions of steady massive objects our interferometer may allow exploiting just small-range electromagnetic fields.
arXiv Detail & Related papers (2024-05-31T17:20:59Z)
Gravity-mediated decoherence [0.0]
Small quantum system within the gravitational field of a massive body will be entangled with the quantum degrees of freedom of the latter. Massive body acts as an environment, and it induces non-unitary dynamics, noise, and decoherence to the quantum system. It is impossible to shield systems on Earth from this gravity-mediated decoherence, which could severely affect all experiments with macroscopic quantum systems.
arXiv Detail & Related papers (2024-02-18T17:44:35Z)
Massive quantum systems as interfaces of quantum mechanics and gravity [0.0]
The traditional view from particle physics is that quantum gravity effects should only become detectable at extremely high energies and small length scales. In recent decades, the size and mass of quantum systems that can be controlled in the laboratory have reached unprecedented scales. This review focuses on proposals where massive quantum systems act as interfaces between quantum mechanics and gravity.
arXiv Detail & Related papers (2023-11-15T18:58:44Z)
Detecting Gravitationally Interacting Dark Matter with Quantum Interference [47.03992469282679]
We show that there is a theoretical possibility to directly detect such particles using highly sensitive gravity-mediated quantum phase shifts. In particular, we consider a protocol utilizing Josephson junctions.
arXiv Detail & Related papers (2023-09-15T08:22:46Z)
Decoherence of a composite particle induced by a weak quantized gravitational field [0.0]
We study the decoherence of a quantum system induced by the quantized gravitational field and by its own quantum nature. Our results may be important in providing a better understanding of many phenomena like the decoherence induced by the gravitational time-dilation.
arXiv Detail & Related papers (2023-08-14T20:49:16Z)
Testing the nonclassicality of gravity with the field of a single delocalized mass [55.2480439325792]
A setup is proposed that is based on a single delocalized mass coupled to a harmonically trapped test mass. We investigate the in-principle feasibility of such an experiment, which turns out to crucially depend on the ability to tame Casimir-Polder forces.
arXiv Detail & Related papers (2023-07-18T15:40:16Z)
Quantum Discord Witness With Uncharacterized Devices [22.915199593638874]
We propose a new approach using uncharacterized measurements to witness quantum discord of an unknown bipartite state within arbitrary dimension system. Our method exhibits high robustness against device imperfections, such as error tolerance, indicating its experimental feasibility.
arXiv Detail & Related papers (2023-03-20T14:51:53Z)
Schr\"odinger cat states of a 16-microgram mechanical oscillator [54.35850218188371]
The superposition principle is one of the most fundamental principles of quantum mechanics. Here we demonstrate the preparation of a mechanical resonator with an effective mass of 16.2 micrograms in Schr"odinger cat states of motion. We show control over the size and phase of the superposition and investigate the decoherence dynamics of these states.
arXiv Detail & Related papers (2022-11-01T13:29:44Z)
Quantum Instability [30.674987397533997]
We show how a time-independent, finite-dimensional quantum system can give rise to a linear instability corresponding to that in the classical system. An unstable quantum system has a richer spectrum and a much longer recurrence time than a stable quantum system.
arXiv Detail & Related papers (2022-08-05T19:53:46Z)
Complementarity-Entanglement Tradeoff in Quantum Gravity [0.0]
Quantization of the gravity remains one of the most important, yet extremely illusive, challenges at the heart of modern physics. Recently, it has been discovered that gravitationally-induced entanglement, tailored in the interferometric frameworks, can be used to witness the quantum nature of the gravity.
arXiv Detail & Related papers (2022-05-04T09:34:10Z)

This list is automatically generated from the titles and abstracts of the papers in this site.