Quantum simulation of dark energy candidates

Hartley, Daniel; Käding, Christian; Howl, Richard; Fuentes, Ivette

doi:10.1103/physrevd.99.105002

Cited by 10 publications

(6 citation statements)

References 78 publications

(107 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Any topological defect passing through atomic clocks within the network would lead to a desynchronisation of the clocks with respect to a reference clock on the ground [468]. BECs can also be used to search for ultralight dark‐matter particles [469], constraining dark energy models [470], and testing physical regimes where quantum mechanics and GR may interact.…”

Section: Fundamental Physics Experimentsmentioning

confidence: 99%

Advances in space quantum communications

Sidhu

Joshi

Gündoğan

et al. 2021

IET Quantum Communication

Self Cite

153

View full text Add to dashboard Cite

Concerted efforts are underway to establish an infrastructure for a global quantum Internet to realise a spectrum of quantum technologies. This will enable more precise sensors, secure communications, and faster data processing. Quantum communications are a front-runner with quantum networks already implemented in several metropolitan areas. A number of recent proposals have modelled the use of space segments to overcome range limitations of purely terrestrial networks. Rapid progress in the design of quantum devices have enabled their deployment in space for in-orbit demonstrations. We review developments in this emerging area of space-based quantum technologies and provide a roadmap of key milestones towards a complete, global quantum networked landscape. Small satellites hold increasing promise to provide a cost effective coverage required to realise the quantum Internet. The state of art in small satellite missions is reviewed and the most current in-field demonstrations of quantum cryptography are collated. The important challenges in space quantum technologies that must be overcome and recent efforts to mitigate their effects are summarised. A perspective on future developments that would improve the performance of space quantum communications is included. The authors conclude with a discussion on fundamental physics experiments that could take advantage of a global, space-based quantum network.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

show abstract

Section: Fundamental Physics Experimentsmentioning

confidence: 99%

Advances in space quantum communications

Sidhu

Joshi

Gündoğan

et al. 2021

IET Quantum Communication

Self Cite

153

View full text Add to dashboard Cite

show abstract

“…Ref. [1]) At low values of the density ρ, the potential allows for spontaneous breaking of the Z 2 symmetry and therefore gives a nonvanishing vacuum expectation value to the symmetron (blue line). However, for ρ µ 2 M 2 , the symmetron can only have a vanishing vacuum expectation value and is therefore screened (orange line).…”

Section: Symmetronsmentioning

confidence: 99%

“…as points with an infinitely high mass density. Certainly, such an infinity can only be of a mathematical nature and must hint at a limitation of the theory 1 . Removing this limitation could be achieved by a UV-completion of GR, which is commonly assumed to be quantum gravity -a theory that reconciles quantum physics with GR.…”

Section: Introductionmentioning

confidence: 99%

Astro- and Quantum Physical Tests of Screened Scalar Fields

Käding

2019

Preprint

Self Cite

View full text Add to dashboard Cite

In general, modified gravity theories are modifications or extensions of Einstein's general relativity. Some of them give rise to additional scalar degrees of freedom in Nature. If these scalar fields exist and are light enough, they should cause a gravity-like fifth force that could, in principle, exceed gravity in its strength. However, there are tight constraints on fifth forces from Solar System-based tests. Screening mechanisms are popular means for avoiding these constraints by suppressing a fifth force in regions of high environmental mass density but allowing for phenomenologically interesting effects in environments of lower densities. In this thesis, scalar field models with screening mechanisms will be discussed and some astro-and quantum physical tests for their existence presented. At first, the impact of disformally coupled symmetrons on gravitational lensing by galaxies will be evaluated. Secondly, it will be shown how fluctuations of a chameleon scalar field induce the open dynamics of a quantum test particle. For this, tools from non-equilibrium quantum field theory will be introduced, developed and applied, and a quantum master equation derived. ZusammenfassungIn der Regel sind modifizierte Gravitationstheorien Modifikationen oder Erweiterungen von Einsteins allgemeiner Relativitätstheorie. Einige davon bedingen zusätzliche skalare Freiheitsgrade in der Natur. Falls solche Skalarfelder existieren und sie leicht genug sind, sollten sie eine gravitationsähnliche fünfte Kraft verursachen, welche sogar stärker als die Schwerkraft sein könnte. Jedoch schränken im Sonnensystem gemachte Beobachtungen die Existenz einer solchen Kraft stark ein. Abschirmmechanismen sind beliebte Methoden, um solche Einschränkungen zu umgehen, indem sie eine fünfte Kraft in Regionen hoher Massendichte unterdrücken, aber in Umgebungen niedrigerer Dichte phänomenologisch interessante Effekte zulassen. In dieser Arbeit werden Skalarfeldmodelle mit Abschirmmechanismen diskutiert und ein paar astro-und quantenphysikalische Tests ihrer Existenz präsentiert. Zunächst wird der Einfluss von disform gekoppelten Symmetronen auf den Gravitationslinseneffekt von Galaxien untersucht. Anschließend wird gezeigt, wie Fluktuationen eines Chamäleonskalarfeldes die offene Dynamik eines Quantentestteilchens induzieren. Dafür werden Werkzeuge aus der Nichtgleichgewichtsquantenfeldtheorie eingeführt, entwickelt und angewandt, sowie damit eine Quantenmastergleichung hergeleitet.

show abstract

“…Many scalar-tensor theories assume a conformal coupling between the metric tensor and the scalar field, and cold atom systems have been found to be well suited to studying these particular models in experiments (e.g. in atom interferometers [17,18]) and analogue gravity simulations [19]. Atom interferometry experiments currently provide the tightest constraints on some of these models [12,20].…”

mentioning

confidence: 99%

“…We begin by modelling our BEC as an interacting massive scalar Bose field Φ (x, t) in a covariant formalism to introduce the background metric in a natural way, following the approach of [19,57,58]. Note that we do not assume that the BEC has "relativistic" properties such as large excitation energies (i.e.…”

mentioning

confidence: 99%

Quantum-enhanced screened dark energy detection

Hartley,

Käding,

Howl

et al. 2019

Preprint

Self Cite

View full text Add to dashboard Cite

We propose an experiment based on a Bose-Einstein condensate interferometer for strongly constraining fifth-force models. Additional scalar fields from modified gravity or higher dimensional theories may account for dark energy and the accelerating expansion of the Universe. These theories have led to proposed screening mechanisms to fit within the tight experimental bounds on fifth-force searches. We show that our proposed experiment would greatly improve the existing constraints on these screening models by many orders of magnitude, entirely eliminating the remaining parameter space of the simplest of these models.

show abstract

Quantum simulation of dark energy candidates

Cited by 10 publications

References 78 publications

Advances in space quantum communications

Advances in space quantum communications

Astro- and Quantum Physical Tests of Screened Scalar Fields

Quantum-enhanced screened dark energy detection

Contact Info

Product

Resources

About