Journal of Optoelectronics·laser

Decoherence Properties of Quantum Memory Cell in Squeezed Vaccum Reservoir

Zhang Deng

Published Jan 1, 2002• 0 citations

Abstract

The two level atom is regarded as quantum memory cell when the quantum memory cell is put in a squeezed vaccum reservoir.Using the time evolution properties of non opposite angle element of quantum memory cells reducible density rectangular array,decoherence properties of quantum memory cell is studied.Quantum memory cells decoherence can be eliminated in a squeezed vaccum reservoir.

Related papers

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·laserJan 1, 20010 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·laserJan 1, 20020 citations

The Two-level Atom's Dynamics in Degenerate Multi-photon Processes

Zhang Deng

We study multi photon interaction of two level atom with thermal radiation field when the two level atom is put in a thermal reservoir.The atomic dynamics are analyzed.The non opposite angle elements of atoms reducible density rectangular array are gived.The time evolution properites of non opposite angle element of atoms reducible density rectangular array can reflect quantum bits decoherence when the two level atom is regarded as quantum bit in quantum computation.

Journal of Optoelectronics·laserJan 1, 20010 citations

Decoherence properties of a two-level atom in the processes with disintegeraton and transition

Deng-Yu Zhang

The two-level atom is regarded as a quantum-bit in quantum information. On the basis of reducible density rectangular array theory, quantum pure state and mixed states analysis methods are used. The two-level atoms decoherence properties are studied in the processes with disintegration and transition.

Chinese journal of atomic and molecular physicsJan 1, 20050 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 zazhiJan 1, 20070 citations

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

Tang Zhi-xiang, Deng-Yu Zhang

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.

Chinese journal of atomic and molecular physicsJan 1, 20040 citations