Snowmass 2021 White Paper: Tabletop experiments for infrared quantum gravity

Carney, Daniel; Chen, Yanbei; Geraci, Andrew; Müller, H. S. P.; Panda, Cristian; Stamp, P. C. E.

doi:10.48550/arxiv.2203.11846

Cited by 4 publications

(4 citation statements)

References 76 publications

(101 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Testing the gravitational law in the quantum era now becomes a blooming field, where many proposals were raised in recently years [62][63][64][65][66][67][68]. These proposals covered many different aspects and the phenomenologies in the quantum/gravity interface, and triggered many discussions and even debates on these phenomenologies [69][70][71][72].…”

Section: Discussion and Summarymentioning

confidence: 99%

Semi-classical gravity phenomenology under the causal-conditional quantum measurement prescription

Liu¹,

Miao²,

Chen³

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

The semi-classical gravity sourced by the quantum expectation value of the matter's energy-momentum tensor will change the evolution of the quantum state of matter. This effect can be described by the Schroedinger-Newton (SN) equation, where the semi-classical gravity contributes a gravitational potential term depending on the matter quantum state. This state-dependent potential introduces the complexity of the quantum state evolution and measurement in SN theory, which is different for different quantum measurement prescriptions. Previous theoretical investigations on the SN-theory phenomenology in the optomechanical experimental platform were carried out under the so-called post/pre-selection prescription. This work will focus on the phenomenology of SN theory under the causal-conditional prescription, which fits the standard intuition on the continuous quantum measurement process. Under the causal-conditional prescription, the quantum state of the test mass mirrors is conditionally and continuously prepared by the projection of the outgoing light field in the optomechanical system. Therefore a gravitational potential depends on the quantum trajectory is created and further affects the system evolution. In this work, we will systematically study various experimentally measurable signatures of SN theory under the causal-conditional prescription in an optomechanical system, for both the self-gravity and the mutual gravity scenarios. Comparisons between the SN phenomenology under three different prescriptions will also be carefully made. Moreover, we find that quantum measurement can induce a classical correlation between two different optical fields via classical gravity, which is difficult to be distinguished from the quantum correlation of light fields mediated by quantum gravity.

show abstract

Section: Discussion and Summarymentioning

confidence: 99%

Semi-classical gravity phenomenology under the causal-conditional quantum measurement prescription

Liu¹,

Miao²,

Chen³

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…In [1] we proposed that quantum geometry, that is, the actual geometry typically imposed on Hilbert spaces by quantum mechanical axioms and not a quantized spacetime geometry, becomes dynamical in quantum gravity in a way that is consistent with the principles of unitarity and causality. This proposal sheds new light on the new field of quantum gravity phenomenology [25], which at present covers everything from searches for spacetime symmetry violation in high energy astrophysics to proposals that employ quantum information techniques and nanomechanical oscillators to show empirically that gravity is quantized [26][27][28][29]. In addition to these experimental searches we have proposed to test this new approach to quantum gravity by utilizing multi-path interference and optical lattice atomic clocks [1].…”

Section: Introduction: What Is Quantum Gravity?mentioning

confidence: 99%

Triple interference, non-linear Talbot effect and gravitization of the quantum

Berglund

Geraci

Hübsch

et al. 2023

Class. Quantum Grav.

View full text Add to dashboard Cite

Recently we have discussed a new approach to the problem of quantum gravity in which the quantum mechanical structures that are traditionally ﬁxed, such as the Fubini-Study metric in the Hilbert space of states, become dynamical and so implement the idea of gravitizing the quantum. In this paper we elaborate on a speciﬁc test of this new approach to quantum gravity using triple interference in a varying gravitational ﬁeld. Our discussion is driven by a profound analogy with recent triple-path interference experiments performed in the context of non-linear optics. We emphasize that the triple interference experiment in a varying gravitational ﬁeld would deeply inﬂuence the present understanding of the kinematics of quantum gravity and quantum gravity phenomenology. We also discuss the non-linear Talbot eﬀect as another striking phenomenological probe of gravitization of the geometry of quantum theory.

show abstract

“…The claim is that the gravitational field should be a quantum mediator if the entanglement can be verified, what caused a controversy among experts in the quantum gravity. [3][4][5][6][7][8][9][10][11] The Bose-Marletto-Vedral (BMV) proposal is based on a previously suggested thought experiment by Richard Feynman, in which he discussed that the explanation of quantum interference between gravitational complex amplitudes must be connected with the quantization of the gravitational field. [12] In BMV proposal, the generation of the entanglement has been explained as being directly related to the complex amplitudes of gravitational interaction.…”

Section: Introductionmentioning

confidence: 99%

Essential Role of Destructive Interference in the Gravitationally Induced Entanglement

Rostom

2022

Fortschritte der Physik

View full text Add to dashboard Cite

The gravitationally induced entanglement is a type of quantum entanglement that can be generated between two mesoscopic particles using their Newtonian gravitational interaction. It has attracted a great deal of attention as a new platform for studying quantum aspects of gravity. The present paper analyzes the gravitationally induced entanglement as a pure interference effect and shows that the entanglement is induced solely by a sign change associated with the destructive quantum interference. It is also shown that when the entanglement is non‐maximal, the preparation for destructive interference for one of the particles can recover a maximum visibility interference pattern for the other particle. Therefore, the non‐maximally entangled state can be extremely effective for experimental testing since it can help in reducing requirements (on masses of the particles and their interaction duration, separation distances and sources) and preserve the information about entanglement at the same time. As a result, the improvement in the signal‐to‐noise ratio is demonstrated and a parameter that determines minimal requirements for experimental testing is defined.

show abstract

Snowmass 2021 White Paper: Tabletop experiments for infrared quantum gravity

Cited by 4 publications

References 76 publications

Semi-classical gravity phenomenology under the causal-conditional quantum measurement prescription

Semi-classical gravity phenomenology under the causal-conditional quantum measurement prescription

Triple interference, non-linear Talbot effect and gravitization of the quantum

Essential Role of Destructive Interference in the Gravitationally Induced Entanglement

Contact Info

Product

Resources

About