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) - Does the system entanglement care about the readout efficiency of
quantum measurement? [49.1574468325115]
We quantify the entanglement for a particle on a 1d quantum random walk under inefficient monitoring.
We find that the system's maximal mean entanglement at the measurement-induced quantum-to-classical crossover is in different ways by the measurement strength and inefficiency.
arXiv Detail & Related papers (2024-02-29T18:10:05Z) - 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.
Preparations of massive systems in quantum states paves the way for the explorations of a low-energy regime in which gravity can be both sourced and probed by quantum systems.
arXiv Detail & Related papers (2023-11-15T18:58:44Z) - Detecting Gravitationally Interacting Dark Matter with Quantum
Interference [51.38773840176434]
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) - A vertical gate-defined double quantum dot in a strained germanium
double quantum well [48.7576911714538]
Gate-defined quantum dots in silicon-germanium heterostructures have become a compelling platform for quantum computation and simulation.
We demonstrate the operation of a gate-defined vertical double quantum dot in a strained germanium double quantum well.
We discuss challenges and opportunities and outline potential applications in quantum computing and quantum simulation.
arXiv Detail & Related papers (2023-05-23T13:42:36Z) - 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) - 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) - Operational Resource Theory of Imaginarity [48.7576911714538]
We show that quantum states are easier to create and manipulate if they only have real elements.
As an application, we show that imaginarity plays a crucial role for state discrimination.
arXiv Detail & Related papers (2020-07-29T14:03:38Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.