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pro vyhledávání: '"Großardt, André"'
The prediction of non-local phenomena is a key attribute of quantum mechanics that distinguishes it from classical theories. It was recently suggested that state swapping is one such effect that a fundamentally classical gravitational field cannot gi
Externí odkaz:
http://arxiv.org/abs/2410.21009
Autor:
Großardt, André
We present an algorithm that uses a single ancilla qubit that can evolve nonlinearly, and show how to use it to efficiently solve generic nonlinear Schr\"odinger equations, including nonlocal Hartree equations and the Navier-Stokes equation for an ir
Externí odkaz:
http://arxiv.org/abs/2403.10102
Publikováno v:
in: C. Pfeifer, C. L\"ammerzahl (eds.), Modified and Quantum Gravity, Lecture Notes in Physics 1017 (Springer, Cham, 2023)
In this contribution we deal with several issues one encounters when trying to couple quantum matter to classical gravitational fields. We start with a general background discussion and then move on to two more technical sections. In the first techni
Externí odkaz:
http://arxiv.org/abs/2207.05029
Autor:
Döner, M. Kemal, Großardt, André
Publikováno v:
Found. Phys. 52 (2022) 101
Experiments witnessing the entanglement between two particles interacting only via the gravitational field have been proposed as a test whether gravity must be quantized. In the language of quantum information, a non-quantum gravitational force would
Externí odkaz:
http://arxiv.org/abs/2205.00939
Autor:
Großardt, André
Publikováno v:
Int. J, Mod. Phys. D 31, 2242017 (2022)
Recently, interest has increased in the entanglement of remote quantum particles through the Newtonian gravitational interaction, both from a fundamental perspective and as a test case for the quantization of gravity. Likewise, post-Newtonian gravita
Externí odkaz:
http://arxiv.org/abs/2204.03322
Autor:
Großardt, André
Publikováno v:
AVS Quantum Sci. 4 (2022) 010502
I review the arguments most often raised against a fundamental coupling of classical spacetime to quantum matter. I show that an experiment by Page and Geilker does not exclude such a semiclassical theory but mandates an inclusion of an objective mec
Externí odkaz:
http://arxiv.org/abs/2201.10452
Autor:
Großardt, André
There is no conclusive theoretical argument that would require the quantization of the gravitational field. A paradox presented by Mari et al. [Sci. Rep. 6, 22777 (2016)] and its resolution by Belenchia et al. [Phys. Rev. D 98, 126009 (2018)] did not
Externí odkaz:
http://arxiv.org/abs/2107.14666
Autor:
Großardt, André
Publikováno v:
Class. Quantum Grav. 38 (2021) 245009
We present a detailed derivation of a model to study effects of self-gravitation from semi-classical gravity, described by the Schr\"odinger-Newton equation, employing spin superposition states in inhomogeneous magnetic fields, as proposed recently f
Externí odkaz:
http://arxiv.org/abs/2107.05985
Autor:
Großardt, André
Publikováno v:
Phys. Rev. A 102, 040202 (2020)
It has been proposed that quantum features of the gravitational field can be exposed experimentally by employing gravity as a mediator of entanglement. We show that in order to witness this type of entanglement experimentally, strong limits on accele
Externí odkaz:
http://arxiv.org/abs/2007.05762
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