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

Physics Letters A

Electron–longitudinal-acoustic-phonon scattering in double-quantum-dot based quantum gates

Pengpeng Zhao, DWIGHT L. WOOLARD

Published Oct 11, 2007• 3 citations
Publisher
DOI
10.1016/j.physleta.2007.10.013

Related papers

Electron charge decoherence due to electron-phonon coupling in a semiconductor double quantum dot

Vasileios N. Stavrou, Xuedong Hu

Bulletin of the American Physical Society•Mar 23, 2005•0 citations

Charge decoherence in laterally coupled quantum dots due to electron-phonon interactions

Vasileios N. Stavrou, Xuedong Hu

We investigate electron charge decoherence in a laterally coupled single-electron semiconductor double quantum dot through electron-phonon interaction. We analytically and numerically evaluate the relaxation and dephasing rates due to electron coupling to both acoustic and optical phonons, and explore the system parameter space in terms of interdot distance, strength of single-dot confinement, and interdot coupling strength. Our numerical results show that the electron scattering rates are strongly dependent on the strength of the electron confinement and the size of the system. In addition, although the most dominant factor that determines the charge decoherence rate is the energy splitting between the charge qubit states, the details of the double dot configuration are also very important.

arXiv:cond-mat/0503481•Physical Review B•Aug 26, 2005•89 citations

Phonon-Induced Decoherence in Semiconductor Quantum Dots

V. M. Axt, Alexei Vagov, B. Krummheuer +4 more

IMPERIAL COLLEGE PRESS eBooks•Nov 1, 2005•0 citations

Error rate of a charge qubit coupled to an acoustic phonon reservoir

Leonid Evgenevich Fedichkin, Arkady Fedorov

We analyze decoherence of an electron in a double dot due to the interaction with acoustic phonons. For large tunneling rates between the quantum dots, the main contribution to decoherence comes from the phonon emission relaxation processes, while for small tunneling rates, the virtual-phonon, dephasing processes dominate. Our results show that in common semiconductors, such as Si and GaAs, the latter mechanism determines the upper limit for the double-dot charge qubit performance measure.

arXiv:quant-ph/0309024•Physical Review A•Mar 17, 2004•128 citations

Non-Markovian dynamics and phonon decoherence of a double quantum dot charge qubit

Xian-Ting Liang

In this paper we investigate decoherence times of a double quantum dot (DQD) charge qubit due to it coupling with acoustic phonon baths. We individually consider the acoustic piezoelectric as well as deformation coupling phonon baths in the qubit environment. The decoherence times are calculated with two kinds of methods. One of them is based on the qusiadiabatic propagator path integral (QUAPI) and the other is based on Bloch equations, and two kinds of results are compared. It is shown that the theoretical decoherence times of the DQD charge qubit are shorter than the experimental reported results. It implies that the phonon couplings to the qubit play a subordinate role, resulting in the decoherence of the qubit.

arXiv:quant-ph/0506258•Physical Review B•Dec 21, 2005•26 citations

Phonon-Assisted Processes and Spontaneous Emission in Double Quantum Dots

Paweł Karwat, Krzysztof Gawarecki, Katarzyna Roszak +2 more

Lecture notes in nanoscale science and technology•Sep 8, 2013•2 citations
We investigate electron charge decoherence in a laterally coupled single-electron semiconductor double quantum dot through electron-phonon interaction. We analytically and numerically evaluate the relaxation and dephasing rates due to electron coupling to both acoustic and optical phonons, and explore the system parameter space in terms of interdot distance, strength of single-dot confinement, and interdot coupling strength. Our numerical results show that the electron scattering rates are strongly dependent on the strength of the electron confinement and the size of the system. In addition, although the most dominant factor that determines the charge decoherence rate is the energy splitting between the charge qubit states, the details of the double dot configuration are also very important.
In this paper we investigate decoherence times of a double quantum dot (DQD) charge qubit due to it coupling with acoustic phonon baths. We individually consider the acoustic piezoelectric as well as deformation coupling phonon baths in the qubit environment. The decoherence times are calculated with two kinds of methods. One of them is based on the qusiadiabatic propagator path integral (QUAPI) and the other is based on Bloch equations, and two kinds of results are compared. It is shown that the theoretical decoherence times of the DQD charge qubit are shorter than the experimental reported results. It implies that the phonon couplings to the qubit play a subordinate role, resulting in the decoherence of the qubit.