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Article
Astronomy & Astrophysics
Qasem Exirifard et al.
Summary: This paper examines relativistic quantum field theory in the presence of an external electric potential in a general curved spacetime geometry, calculating the leading correction due to spacetime curvature to the Schrodinger equation. The nonvanishing probability of excitation for a hydrogen atom in or scattered by a general Schwarzschild black hole is then computed, with the emitted photon from the excited state extracting energy from the black hole, increasing its decay rate, and contributing to the information paradox.
INTERNATIONAL JOURNAL OF MODERN PHYSICS D
(2022)
Article
Astronomy & Astrophysics
Arjun Berera et al.
Summary: This article examines the possibility of achieving quantum communication using photons across interstellar distances. Various factors that could induce decoherence of photons are considered, and the X-ray region is identified as the prime candidate for establishing a quantum communication channel.
Article
Astronomy & Astrophysics
Fabio Di Pumpo et al.
Summary: Dark matter or violations of the Einstein equivalence principle affect the signal of atomic detectors and the propagation of light in atom interferometers. The effects of light propagation and dilaton on different atom-interferometric setups, including gradiometers, equivalence principle tests, and dark matter detection, are discussed.
Article
Astronomy & Astrophysics
Qasem Exirifard et al.
Summary: This study investigates the interaction between the photon wave function and the Riemann tensor along a null geodesic, using Fermi coordinates. The results show that a photon traveling along a null geodesic gains an additional phase related to the Riemann tensor.
Article
Astronomy & Astrophysics
Roy Barzel et al.
Summary: We study the influence of the relativistic redshift on Hong-Ou-Mandel (HOM) interference and present a genuine quantum test of general relativity. We use Glauber's theory of quantum coherence to predict the coincidence probability of realistic broadband photons in HOM experiments and extend the quantum field theoretical framework to describe the deformation of the spectral profile of multiple photons. The results show that the mutual redshift between sender and receiver can switch the coincidence statistics from photon bunching to photon antibunching and vice versa.
Article
Physics, Particles & Fields
Viacheslav A. Emelyanov
Summary: We propose an approach to incorporate gravity into quantum particle physics. By utilizing quantum field theory and the general principle of relativity, we develop a model for quantum particles in curved spacetime. Through this model, we find that free fall is dependent on the properties of quantum matter, and the universality of free fall and wave-packet spreading are mutually exclusive phenomena. Furthermore, we estimate the Eotvos parameter for a pair of atoms freely falling near the Earth's surface, assuming that wave-packet spreading is more fundamental than the weak equivalence principle.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Quantum Science & Technology
Daniele Dequal et al.
Summary: Establishing secure communication links at a global scale using quantum information science is challenging but achievable, as shown by recent landmark experiments. Continuous-variable encoding in a satellite-to-ground downlink configuration can lead to positive secret key rates, especially in low-Earth-orbit scenarios, with limitations potentially arising in higher orbits due to finite-size effects. Our analysis helps determine parameters for successful secret key exchange and can guide further experimental efforts in this direction.
NPJ QUANTUM INFORMATION
(2021)
Article
Physics, Multidisciplinary
Qasem Exirifard et al.
Summary: This study explores how the curvature of spacetime geometry affects the propagation of information carriers and emphasizes the significance of gravitational distortion on Earth-to-satellite communication. It highlights the need to pre- or post-correct this distortion at the sender or receiver to retrieve the information.
COMMUNICATIONS PHYSICS
(2021)
Article
Astronomy & Astrophysics
David Edward Bruschi et al.
Summary: The study explores the interplay between gravity and quantum coherence in light pulses propagating in curved spacetime, showing that quantum coherence can enhance deformation induced by propagation. It further supports the idea that quantum features, such as coherence, can be used to probe gravitational properties of physical systems. The research focuses on Earth-to-satellite communication setups where the effects of gravity, although weak, can be tested with current satellite technologies.
Article
Astronomy & Astrophysics
Arjun Berera et al.
Summary: From a cosmological perspective, we have identified potential sources of decoherence for U(1) gauge bosons, including interactions with different species in the cosmological medium and effects due to the expansion of the Universe. Our analysis focuses on the case of axionlike particles and their predicted decay channels, ultimately showing that these interactions have a negligible effect on decoherence. This suggests that quantum teleportation experiments with photon energies in the 1-10 keV range could be feasible at cosmological distances up to the galaxy formation epoch or beyond.
Article
Quantum Science & Technology
Soeren Wengerowsky et al.
NPJ QUANTUM INFORMATION
(2020)
Article
Multidisciplinary Sciences
Juan Yin et al.
Article
Physics, Multidisciplinary
Felix Hufnagel et al.
NEW JOURNAL OF PHYSICS
(2020)
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Astronomy & Astrophysics
Robert H. Jonsson et al.
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Optics
Hugo Larocque et al.
Article
Astronomy & Astrophysics
Shijing Cheng et al.
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Physics, Multidisciplinary
Hugo Larocque et al.
CONTEMPORARY PHYSICS
(2018)
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Physics, Multidisciplinary
Juan Yin et al.
PHYSICAL REVIEW LETTERS
(2017)
Review
Physics, Multidisciplinary
K. Y. Bliokh et al.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2017)
Article
Physics, Multidisciplinary
S. M. Lloyd et al.
REVIEWS OF MODERN PHYSICS
(2017)
Article
Multidisciplinary Sciences
Juan Yin et al.
Article
Astronomy & Astrophysics
David Edward Bruschi et al.
Article
Astronomy & Astrophysics
David Edward Bruschi et al.
Article
Astronomy & Astrophysics
Wenting Zhou et al.
CLASSICAL AND QUANTUM GRAVITY
(2012)
Article
Optics
M. Merano et al.
Article
Physics, Particles & Fields
Zhiying Zhu et al.
JOURNAL OF HIGH ENERGY PHYSICS
(2008)
Article
Astronomy & Astrophysics
Hongwei Yu et al.
Article
Physics, Multidisciplinary
R. Ursin et al.
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Astronomy & Astrophysics
Matthias Blau et al.
CLASSICAL AND QUANTUM GRAVITY
(2006)
