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 atomic and molecular physics

The elimination of the quantum bit's decoherence in a thermal reservoir

Tang Zhi-xiang, Deng-Yu Zhang

Published Jan 1, 2004• 0 citations
OpenAlex

Abstract

Using a two-level atom as a quantum bit, We have studied the decoherent properties of the single quantum bit model in a thermal reservoir and the intensity dependent coupling Jaynes-Cummings model by calculating the non-oposite angle elements of the reduced density matrix of the intraction system,respectively. We also work out the restriction equation that must be satisfied by the external controllable driving field when the decoherence is to be eliminated.

Related papers

Elimination of the two-level atom's decoherence of two-photon Jaynes-Cummings mode with Stark shift

Deng-Yu Zhang

The decoherence characteristics of two-level atoms, which are put in a thermal reservoir and under the degenerate two-photon Jeynes-Cummings model including Stark shift, are studied by calculating the reduced density matrix elements of the interaction system. The restriction equation that must be satisfied by the external controllable driving field when the decoherence is to be eliminated is also derived.

Chinese Journal of Quantum Electronics•Jan 1, 2004•0 citations

Two-level atom's decoherence vanishing from sight through three-photon processes in high-intensity cavity

Xie Li-Jun

The problem of the decoherence of two-level atom being put in a thermal reservoir through an external controllable driving field is studied in high -intensity cavity.The non-opposite angle element of two-level atom's reducible density rectangular array is obtained in three photon processes.We discuss the properties of an external driving field when atom's decoherence vanish from sight.

Jiguang zazhi•Jan 1, 2007•0 citations

Decoherence Properties of a Two-level Atom Interacting with aThermal Radiation Field without Rotating Wave Approximation

Deng-Yu Zhang

The interaction of a two-level atom with a thermal radiation field for single-photon processes and two-photon processes without rotating wave approximation is analysed. The atom's reduced density matrix is calculated when the quantum theory in small system coupled to thermal reservoir is used. The decoherence properties of atom is analyzed.[WT5HZ]

Acta Sinica Quantum Optica•Jan 1, 2001•0 citations

Decoherence of Two-level Atoms in Thermal Radiation Field

Deng-Yu Zhang

The two-level atom is regarded as quantum-bit.We study quantum-bit reducible density rectangular array when the quantum-bit are put in a thermal reservoir.The time evolution properties of non-opposite angle element of rectangular array are obtained and decoherence of quantum-bit is analyzed.The results show the thermal radiation and quantum noise can influence the qubits' decoherence when amplitude damping be included in the consideration.

Journal of Optoelectronics·laser•Jan 1, 2001•0 citations

Decoherence Properties of a Two-level Atom in Degenerate Two-photon Processes with a Kerr-like Medium

Zhang Deng

The two level atom is put in a thermal radiation field with a Kerr like medium.The time evolution properties of non opposite angle element of two level atoms reducible density rectangular array is discussed.Decoherence properties of two level atoms quantum bit is studied in degenerate two photon processes when the two level atom interacts with the external environment (Kerr like medium and thermal reservoir).

Journal of Optoelectronics·laser•Jan 1, 2002•0 citations

Maintenance of Coherence and Polarization Evolution in a Supersymmetric Multiphoton Model

Jian Qi Shen, Zhi Chao Ruan

The elimination of decoherence of two-state quantum systems interacting with a thermal reservoir through an external controllable driving field is discussed in the present paper. The restriction equation with which the external controllable driving field should agree will be derived. Based on this, we obtain the time-development equation of the off-diagonal elements of density operator in the supersymmetric multiphoton two-state quantum systems, which is helpful for studying the polarization evolution in this two-state quantum model.

arXiv:quant-ph/0401009•Jan 3, 2004•0 citations
Using a two-level atom as a quantum bit, We have studied the decoherent properties of the single quantum bit model in a thermal reservoir and the intensity dependent coupling Jaynes-Cummings model by calculating the non-oposite angle elements of the reduced density matrix of the intraction system,respectively. We also work out the restriction equation that must be satisfied by the external controllable driving field when the decoherence is to be eliminated.
The elimination of decoherence of two-state quantum systems interacting with a thermal reservoir through an external controllable driving field is discussed in the present paper. The restriction equation with which the external controllable driving field should agree will be derived. Based on this, we obtain the time-development equation of the off-diagonal elements of density operator in the supersymmetric multiphoton two-state quantum systems, which is helpful for studying the polarization evolution in this two-state quantum model.