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

Chinese Journal of Physics

Decoherence dynamics of a general quadratic state in a thermal environment

Zhi-Long Wan, Hong-Chun Yuan, Xiao-Lei Yin, Chang-Ying Wang, Yixing Wang

Published Aug 29, 2025• 2 citations
Publisher
DOI
10.1016/j.cjph.2025.08.034

Related papers

Rigorous performance bounds for quadratic and nested dynamical decoupling

Yuhou Xia, Götz Silvester Uhrig, Daniel A. Lidar

We present rigorous performance bounds for the quadratic dynamical decoupling pulse sequence which protects a qubit from general decoherence, and for its nested generalization to an arbitrary number of qubits. Our bounds apply under the assumptions of instantaneous pulses and of bounded perturbing environment and qubit-environment Hamiltonians such as those realized by baths of nuclear spins in quantum dots. We prove that if the total sequence time is fixed then the trace-norm distance between the unperturbed and protected system states can be made arbitrarily small by increasing the number of applied pulses.

arXiv:1111.3289•Physical Review A•Dec 29, 2011•11 citations

Dynamics of collective decoherence and thermalization

Marco Merkli, G. P. Berman, Israel Michael Sigal

arXiv:0804.0243•Annals of Physics•Aug 4, 2008•25 citations

DECOHERENCE AS A FUNDAMENTAL PHENOMENON IN QUANTUM DYNAMICS

Michael B. Mensky

WORLD SCIENTIFIC eBooks•Oct 1, 2002•9 citations

Decoherence decay time and thermal distributions for quadratic quantum Lagrangians

Zahra Musavi

Quantum propagator for a general quadratic Lagrangian is obtained using position and momentum operators in Heisenberg picture and properties of propagators. For a quantum system governed by a general quadratic Lagrangian containing external forces, decoherence decay time, thermal distribution functions, and thermal Wigner function are obtained in high temperature and weak coupling regime.

Canadian Journal of Physics•Feb 26, 2018•1 citation

Resonance Dynamics and Decoherence

Marco Merkli

We present a rigorous analysis of the phenomenon of decoherence for general N -level quantum systems coupled a reservoir modelled by a thermal bosonic quantum environment. We present an explicit form of the dominant reduced dynamics of open systems. We give explicit results for a spin 1/2 (qubit), including decoherence and thermalization times. Our approach is based on a dynamical theory of quantum resonances. It yields the exact reduced dynamics of the small system and does not involve master equation or van Hove limit approximations. This approach is suitable for a wide variety of systems which are not explicitly solvable, including systems of interacting spins (registers of interacting qubits), for which the coupling between the system and the environment is fixed but small.

Birkhäuser Basel eBooks•Jan 1, 2009•2 citations

Decoherence due to thermal effects in two quintessential quantum systems

SHMUEL NUSSINOV, Tsitsi G. Madziwa-Nussinov, Zohar Nussinov

arXiv:1407.0362•Quantum Studies Mathematics and Foundations•Jun 10, 2014•5 citations
We present rigorous performance bounds for the quadratic dynamical decoupling pulse sequence which protects a qubit from general decoherence, and for its nested generalization to an arbitrary number of qubits. Our bounds apply under the assumptions of instantaneous pulses and of bounded perturbing environment and qubit-environment Hamiltonians such as those realized by baths of nuclear spins in quantum dots. We prove that if the total sequence time is fixed then the trace-norm distance between the unperturbed and protected system states can be made arbitrarily small by increasing the number of applied pulses.
We present a rigorous analysis of the phenomenon of decoherence for general N -level quantum systems coupled a reservoir modelled by a thermal bosonic quantum environment. We present an explicit form of the dominant reduced dynamics of open systems. We give explicit results for a spin 1/2 (qubit), including decoherence and thermalization times. Our approach is based on a dynamical theory of quantum resonances. It yields the exact reduced dynamics of the small system and does not involve master equation or van Hove limit approximations. This approach is suitable for a wide variety of systems which are not explicitly solvable, including systems of interacting spins (registers of interacting qubits), for which the coupling between the system and the environment is fixed but small.