The decoherence in quantum mechanics is studied.

介绍了量子力学的退相干理论。

The average fidelity can be improved by adjusting phase decoherence and detuning.

平均保真度也可以通过调节相位退相干和失谐得到提高。

In quantum system, noise primary results from decoherence and imperfect quantum gates.

在量子系统中，信道噪声主要源于消相干效应和量子门的不精确性。

The influence on decoherence of the mutual inductance coupling between the circuit components is complicated.

我们发现电路元件之间的互感耦合效应对消相干的影响效果是很复杂的。

On the other hand, quantum decoherence is one of the key obstacles in the applications of quantum information.

另一方面，量子退相干是量子信息领域走向实际应用的重要障碍之一。

In addition to the stability and accuracy of satellite orbital data triggered decoherence is one of the reasons.

另外卫星的轨道数据的稳定性和准确性也是引发退相干的原因之一。

One of the main difficulties of quantum computation is that decoherence destroys the information in a quantum computer memory cell.

量子计算机存储单元的相干脱散，破坏量子态中的信息，是量子计算机难以实现的主要原因之一。

The result shows that:1. Detuning and phase decoherence have influence on maximal entangled fidelity for a arbitrary pure input state.

失谐量和退相干系数对输入态为任意纯态情况下的完全纠缠部分保真度具有一定的影响；

Some fundamental principles, such as the principle of quantum state superposition, quantum entangled state and quantum decoherence etc.

在实现信息处理的过程中，量子态叠加原理、量子纠缠和量子退相干等基本原理和基本概念应当充分考虑。

The two level atom′s decoherence is suppressed when the time evolution properties of an external driving field satisfy certain conditions.

当外加驱动场的演化规律满足一定的条件时，可使两能级原子的消相干被消除。

We have studied the problem of decoherence of two-level atoms which are put in a thermal reservoir through an external controllable driving field.

研究了置于外部环境(热库)中的二能级原子在外加驱动场时原子的消相干问题。

This thesis may give a clear clue of decoherence dynamics under different approximations and how to preserve quantum coherence in the steady state.

本论文对在不同近似下的退相干动力学给出了清晰的图像并对如何保持量子相干性有一定的帮助。

In this paper, we apply unambiguous quantum state filtering to evaluation of the sensing decoherence channel for odd and even coherent probe states.

本文利用确定量子态过滤的方法，评价了奇偶相干态的去相干通道的敏感性。

The results show the thermal radiation and quantum noise can influence the qubits' decoherence when amplitude damping be included in the consideration.

如果仅考虑振幅阻尼，结果表明热辐射与量子噪声对量子位的消相干产生影响。

Traditionally, the quantum decoherence process is mathematically solved by using Markov approximation. That is, the environment has no memory effect on the system.

传统的刻画量子退相干的方法都是采取了马尔科夫近似，即认为环境对系统不存在记忆效应。

We investigate the time evolution of the entanglement in the interacting system of a single two-level atom and a single mode coherence field with phase decoherence.

研究了存在相位退相干时原子与光场相互作用的纠缠演化和保持。

The dynamics of entanglement decoherence for fragile entangled states is discussed by taking into account the ohmic dissipation under the low temperature approximation.

对于脆弱纠缠态分析了它们在低温条件欧姆型耗散下的纠缠消相干演化动力学。

The calculation results show that the simple intensity-dependent damping factor of pure dephasing can well describe the decoherence properties of complex multi-level system.

分析表明，可以用简单的纯失相强度相关衰减因子来等效地分析复杂的多能级跃迁体系的退相干特性。

If we can control freely system decoherence, we can realize quantum communications and quantum computer. So it is a primary signification to whether control decoherence or not.

如果能够控制系统的退相干，我们就可以实现量子通讯和量子计算机，因此是否能够控制退相干具有十分重要的意义。

We study a pair of two-level atoms reducible density rectangular array when atoms by dipole-dipole interaction are put in a thermal reservoir. Decoherence of atoms is analyzed.

两个两能级原子置于外部环境(热库)中，当计及原子偶极间的相互作用时，通过研究两个原子约化密度矩阵，分析原子状态消相干规律。

Decoherence is a universal essential problem in modern quantum information and quantum computation. It is significant and difficult to study this problem in modern physical field.

退相干是现代量子信息与量子计算中普遍存在的本质问题，对于研究它是当今物理界的一个重点和难点。

This paper explains the programme of decoherence. And under the programme of decoherence, it also analyzes the locality in the classical world and causation without determinism in quantum mechanics.

阐释了退相干解释的纲领，并在退相干解释纲领下，分析了经典世界中的定域性和量子力学中的非充分决定论的因果关系。