Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

The Ninth Marcel Grossmann Meeting

COSMOLOGICAL CONSTANT FROM DECOHERENCE?

Friedemann Queißer, Claus Kiefer, Alexei A. Starobinsky

Published Feb 1, 2012• 16 citations
Publisher
DOI
10.1142/9789814374552_0199

Related papers

DECOHERENCE ON THE ONSET OF INFLATION IN QUANTUM COSMOLOGY

Alexander Yu. Kamenshchik

The Ninth Marcel Grossmann Meeting•Dec 1, 2002•0 citations

Decoherence in quantum cosmology

Claus Kiefer

•Jan 1, 1991•5 citations

SIMULATION OF COSMOLOGICAL HORIZONS BY ULTRACOLD ATOMS IN OPTICAL LATTICES AND MULTI-JOSEPHSON-JUNCTION LOOPS

Yurii V. Dumin

The Ninth Marcel Grossmann Meeting•Feb 1, 2012•0 citations

COPING WITH DECOHERENCE: PARALLELIZING THE QUANTUM FOURIER TRANSFORM

Marius Nagy, Selim G. Akl

Rank-varying computational complexity describes those computations in which the complexity of executing each step is not a constant, but evolves throughout the computation as a function of the order of execution of each step [2]. This paper identifies practical instances of this computational paradigm in the procedures for computing the quantum Fourier transform and its inverse. It is shown herein that under the constraints imposed by quantum decoherence, only a parallel approach can guarantee a reliable solution or, alternatively, improve scalability.

Parallel Processing Letters•Sep 1, 2010•9 citations

Decoherence in Quantum Cosmology

Masa‐aki Sakagami, Takashi Okamura, Hiroto Kubotani

Proceedings of the Seventh Marcel Grossman Meeting on recent developments in theoretical and experimental general relativity, gravitation, and relativistic field theories•Jan 1, 1996•0 citations

DECOHERENCE OF THE TRIANGULAR BOUND POTENTIAL QUANTUM DOT QUBIT

Jia-Kui Sun, Hongjuan Li, Jing‐Lin Xiao

We study the eigenenergies and the eigenfunctions of the ground and the first excited states of an electron, which is strongly coupled to the LO-phonon in a quantum dot with triangular bound potential by using the Pekar variational method. This system may be used as a two-level qubit. Our numerical results indicate that the decoherence rate will decrease with increasing the confinement length of the quantum dot (QD) and decrease with increasing electron-LO-phonon coupling constant. The influences of the polar angle on the decoherence rate are dominant when the coupling constant increases, while the effects of the polar angle on that are strong when the confinement length increases. Meanwhile, the decoherence rate varies periodically with respect to the polar angle.

Modern Physics Letters B•Oct 30, 2009•8 citations
Rank-varying computational complexity describes those computations in which the complexity of executing each step is not a constant, but evolves throughout the computation as a function of the order of execution of each step [2]. This paper identifies practical instances of this computational paradigm in the procedures for computing the quantum Fourier transform and its inverse. It is shown herein that under the constraints imposed by quantum decoherence, only a parallel approach can guarantee a reliable solution or, alternatively, improve scalability.
We study the eigenenergies and the eigenfunctions of the ground and the first excited states of an electron, which is strongly coupled to the LO-phonon in a quantum dot with triangular bound potential by using the Pekar variational method. This system may be used as a two-level qubit. Our numerical results indicate that the decoherence rate will decrease with increasing the confinement length of the quantum dot (QD) and decrease with increasing electron-LO-phonon coupling constant. The influences of the polar angle on the decoherence rate are dominant when the coupling constant increases, while the effects of the polar angle on that are strong when the confinement length increases. Meanwhile, the decoherence rate varies periodically with respect to the polar angle.