检索结果-南通市图书馆

Quantum state swap for two trapped Rydberg atoms

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2012年第4期21卷 82-87页

作者：吴怀志杨贞标郑仕标 Laboratory of Quantum Optics Department of PhysicsFuzhou UniversityFuzhou 350002China Key Laboratory of Quantum Information University of Science and Technology of ChinaChinese Academy of SciencesHefei 230026China

The quantum swap gate is one of the most useful gates for quantum computation. Two-qubit entanglement and a controlled-NOT quantum gate in a neutral Rydberg atom system have been achieved in recent experiments. It is therefore very interesting to propose a scheme here for swapping a quantum state between two trapped neutral atoms via the Rydberg blockade mechanism. The atoms interact with a sequence of laser pulses without individual addressing. The errors of the swap gate due to imprecision of pulse length, finite Rydberg interaction, and atomic spontaneous emission are discussed.

关键词： neutral atom swap gate Rydberg blockade

Distributed Qutrit-Qutrit Entanglement through Laser-Driven Resonant Interaction

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2014年第2期31卷 62-65页

作者：吴怀志杨贞标 Lab of Quantum Optics Department of Physics Fuzhou University Fuzhou 350002

We propose to deterministically realize the qutrit-qutrit maximal entanglement for two atoms held in separate cavities coupled by an optical resonator. We study such a system in the resonant regime and show that the l... 详细信息

关键词： QUANTUM CAVITY INEQUALITIES GENERATION ATOMS STATE

Scheme for direct measurement of Wigner function in two-mode cavity QED driven by classical fields

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2010年第12期19卷 255-262页

作者：吴怀志杨贞标郑仕标 Department of Physics and State Key Laboratory Breeding Base of Photocatalysis Fuzhou University

We propose a scheme for the direct measurement of Wigner function in two-mode cavity QED. The atoms are sent to resonantly interact with two orthogonally polarized cavity modes in the presence of strong classical field. The probability of measuring the atom in the ground state directly gives the useful information of the cavity field. This method can be used for quantum non-demolition measurement of the photon number.

关键词： two-mode cavity Wigner function quantum non-demolition measurement

Effective Scheme for Generating Cluster States in Cavity QED

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2007年第11期24卷 3055-3058页

作者：吴怀志杨贞标郑仕标 Department of Electronic Science and Applied Physics Fuzhou University Fuzhou 350002

We propose a scheme to prepare many two-mode cavities into one-dimensional cluster states in the context of cavity QED. The left-circularly polarized state and right-circularly polarized state of the cavity are encoded as the logic zero and one of the qubits. In the scheme, the atomic spontaneous emission is suppressed, and the fidelity is unaffected by the cavity decay on the assumption that the detection efficiencies of all the photondetectors are 1.

关键词： coated conductor buffer layer self-epitaxy CeO2

Robust Generation of Four-Mode Entangled States through Adiabatic Passages

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2007年第7期24卷 1795-1798页

作者：吴怀志杨贞标郑仕标 Department of Electronic Science and Applied Physics Fuzhou University ~hzhou 350002

We propose a robust scheme to generate four-mode entangled states by using the method of adiabatic passage. Our scheme is more insensitive to certain practical sources of noise, such as randomness in the atom＇s position, atomic spontaneous emission. In addition, the Rabi frequencies of the classical field and interaction time need not to be accurately adjusted as long as the adiabatic condition is ful6lled. The 6delity for the prepared state is higher than 0.97 under current experimental parameters.

关键词： SINGLE-ATOM CAVITY

光纤耦合的腔量子电动力学系统中的分布式量子信息（英文）

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

安徽大学学报（自然科学版） 2014年第1期38卷 1-11页

作者：尹璋琦杨贞标清华大学交叉信息研究院量子信息中心北京100084 福州大学物理系福建福州350002

光纤耦合的腔量子电动力学系统是一个完美的理论模型,可以实现决定性的量子信息过程.该文综述了最近在光纤耦合的腔量子电动力学系统中实现分布式量子信息处理的工作.讨论了如何在该系统中实现量子态传输、纠缠分配和量子逻辑门,并概述... 详细信息

光纤耦合的腔量子电动力学系统是一个完美的理论模型,可以实现决定性的量子信息过程.该文综述了最近在光纤耦合的腔量子电动力学系统中实现分布式量子信息处理的工作.讨论了如何在该系统中实现量子态传输、纠缠分配和量子逻辑门,并概述了多种不同的方案,如共振耦合、绝热操控、虚激发过程.最后,讨论了这个方向上的实验进展.

关键词：量子计算腔量子电动力学纠缠分配态传输

Robust generation of qutrit entanglement via adiabatic passage of dark states

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2010年第9期19卷 392-398页

作者：杨贞标吴怀志郑仕标 Department of Physics and State Key Laboratory Breeding Base of Photocatalysis Fuzhou University

We propose a scheme for the deterministic generation of qutrit entanglement for two atoms trapped in an optical cavity. Taking advantage of the adiabatic passage, the operation is immune to atomic spontaneous emission as the atomic excited states are never populated; under certain conditions, the probability that the cavity is excited is negligible. We also study the influences of the dissipation due to the atomic spontaneous emission and cavity decay.

关键词： qutrit entanglement adiabatic passage dark states cavity quantum electrodynamics

Generation of cluster states for cavity fields

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2008年第11期17卷 4207-4210页

作者：贾连军杨贞标吴怀志郑仕标 Department of Physics Lanzhou University Department of Electronic Science and Applied Physics Fuzhou University

This paper proposes an alternative scheme for generating cluster-type of entangled coherent states. This scheme is based on resonant interaction of a two-mode cavity with a two-level atom driven by strong classical fi... 详细信息

关键词： cluster state coherent state bimodal cavity

Photon bunching and anti-bunching with two dipole-coupled atoms in an optical cavity

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2016年第10期25卷 149-156页

作者：郑雅梅胡长生杨贞标吴怀志 Department of Physics Fuzhou University

We investigate the effect of the dipole–dipole interaction(DDI) on the photon statistics with two atoms trapped in an optical cavity driven by a laser field and subjected to cooperative emission. By means of the quantum trajectory analysis and the second-order correlation functions, we show that the photon statistics of the cavity transmission can be flexibly modulated by the DDI while the incoming coherent laser selectively excites the atom–cavity system’s nonlinear Jaynes–Cummings ladder of excited states. Finally, we find that the effect of the cooperatively atomic emission can also be revealed by the numerical simulations and can be explained with a simplified picture. The DDI induced nonlinearity gives rise to highly nonclassical photon emission from the cavity that is significant for quantum information processing and quantum communication.

关键词： photon bunching and anti-bunching dipole–dipole interaction cooperative emission cavity QED