Study of Decoherence of Elementary Gates Implemented in a Chain of Few Nuclear Spins Quantum Computer Model

• 作者: G. V. López P. López
• 来源期刊: 现代物理(英文)
• 学科: 医学
• 关键词: DECOHERENCE Not GATE Controlled-Not GATES Controlled-Controlled-Not GATE Nuclear Spin CHAIN QUANTUM Computer
• 年，卷（期）: 2012,（1）
• 页码范围: 85-101
• 页数: 17页
• 分类号: R73

摘要

We study the phenomenon of decoherence during the operation of one qubit transformation, controlled-not (CNOT) and controlled-controlled-not (C2NOT) quantum gates in a quantum computer model formed by a linear chain of three nuclear spins system. We make this study with different type of environments, and we determine the associated decoherence time as a function of the dissipative parameter. We found that the dissipation parameter to get a well defined quantum gates (without significant decoherence) must be within the range of . We also study the behavior of the purity parameter for these gates and different environments and found linear or quadratic decays of this parameter depending on the type of environments.