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基于双电子自旋与纳米机械谐振子强耦合的纠缠态制备 被引量:1
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作者 芦瑞琪 任韧 +2 位作者 胡晓蕊 郭亚茹 薛丹丹 《光学学报》 EI CAS CSCD 北大核心 2018年第10期341-347,共7页
以金刚石氮空位(NV)色心为基础,提出了一种双电子自旋与量子化的纳米机械谐振子间的强耦合方案,利用谐振子的耗散过程制备了两比特二维纠缠稳态。数值模拟结果表明,具有不同初态的系统均可演化得到高保真、高纠缠的目标态。该方案减小... 以金刚石氮空位(NV)色心为基础,提出了一种双电子自旋与量子化的纳米机械谐振子间的强耦合方案,利用谐振子的耗散过程制备了两比特二维纠缠稳态。数值模拟结果表明,具有不同初态的系统均可演化得到高保真、高纠缠的目标态。该方案减小了耗散对系统演化的破坏,对品质因子无要求,降低了实验的操作难度,具有很高的可靠性和可行性。 展开更多
关键词 量子光学 量子通信 耗散过程 高保真 纳米机械谐振子 纠缠态
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瓦里安300XP离子注入机改造及功能开发 被引量:1
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作者 张明亮 韩国威 +3 位作者 刘庆 李艳 杨富华 王晓东 《分析测试技术与仪器》 CAS 2020年第3期151-159,共9页
在完全掌握瓦里安300XP离子注入机各部件的工作原理后,将原离子源供电系统中500 W电流源和450 W起弧电源升级为1500 W电流源和1500 W起弧电源,并集成到当前系统中.将现有不稳定的气体流量、离子源电源、分析器、源磁场和吸极高压塑料光... 在完全掌握瓦里安300XP离子注入机各部件的工作原理后,将原离子源供电系统中500 W电流源和450 W起弧电源升级为1500 W电流源和1500 W起弧电源,并集成到当前系统中.将现有不稳定的气体流量、离子源电源、分析器、源磁场和吸极高压塑料光纤隔离控制线路,升级成多通道光纤通讯光端机隔离控制系统.将一个10 cm进样终端改造成15 cm的样品卡盘,并开发了一套独立控制剂量监测系统.改造后,硼最大束流超过150μA,且可调节.15 cm圆片的片内及片间电阻不均匀性小于3.5%.利用大束流硼离子注入制备浓硼掺杂单晶硅结构层,应用到微电子机械系统压力传感器、热电器件以及纳米谐振子器件中. 展开更多
关键词 离子注入 浓硼掺杂 自停止腐蚀 微电子机械系统压力传感器 热电器件 纳米谐振子
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Quantum Entanglement Creating and Evolving in Two Charge Qubits Coupling to a Nanomechanical Resonator System 被引量:1
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作者 张风阳 石瑛 +1 位作者 李崇 宋鹤山 《Communications in Theoretical Physics》 SCIE CAS CSCD 2011年第8期385-388,共4页
We investigate the coupling of two superconducting quantum interference devices (SQUIDs) via a metallicnanomechanical resonator (NAMR),and bring out the effective interaction between the two SQUIDs.By constructingthe ... We investigate the coupling of two superconducting quantum interference devices (SQUIDs) via a metallicnanomechanical resonator (NAMR),and bring out the effective interaction between the two SQUIDs.By constructingthe evolution operator,we also study the evolvement of entanglement in this composed system. 展开更多
关键词 Josephson junction quantum information
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All-optical scheme for detecting the possible Majorana signature based on QD and nanomechanical resonator systems 被引量:4
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作者 CHEN HuaJun ZHU KaDi 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2015年第5期2-15,共14页
Majorana fermions(MFs) are exotic particles that are their own anti-particles. Currently, the search for MFs occurring as quasiparticle excitations in condensed matter systems has attracted widespread interest, becaus... Majorana fermions(MFs) are exotic particles that are their own anti-particles. Currently, the search for MFs occurring as quasiparticle excitations in condensed matter systems has attracted widespread interest, because of their importance in fundamental physics and potential applications in topological quantum computation based on solid-state devices. Motivated by recent experimental progress towards the detection and manipulation of MFs in hybrid semiconductor/superconductor heterostructures, in this review, we present a novel proposal to probe MFs in all-optical domain. We introduce a single quantum dot(QD), a hybrid quantum dot-nanomechanical resonators(QD-NR) system, and a carbon nanotube(CNT) resonator implanted in a single electron spin system with optical pump-probe technology to detect MFs, respectively. With this scheme, a possible Majorana signature is investigated via the probe absorption spectrum and nonlinear optical Kerr effect, and the coupling strength between MFs and the QD or the single electron spin is also determined. In the hybrid QD-NR system, vibration of the NR will enhance the nonlinear optical effect, which makes the MFs more sensitive for detection. In the CNT resonator with a single electron, the single electron spin can be considered as a sensitive probe, and the CNT resonator behaved as a phonon cavity is robust for detecting of MFs. This optical scheme will provide another method for the detection MFs and will open the door for new applications ranging from robust manipulation of MFs to quantum information processing based on MFs. 展开更多
关键词 Majorana fermions QD nanomechanical resonator carbon nanotube resonator optical pump-probe technology
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Hybrid opto-mechanical systems with nitrogen-vacancy centers 被引量:4
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作者 YIN ZhangQi ZHAO Nan LI TongCang 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2015年第5期29-40,共12页
In this review, we briefly review recent works on hybrid (nano) and diamond nitrogen-vacancy (NV) centers. We also review opto-mechanical systems that contain both mechanical oscillators two different types of mec... In this review, we briefly review recent works on hybrid (nano) and diamond nitrogen-vacancy (NV) centers. We also review opto-mechanical systems that contain both mechanical oscillators two different types of mechanical oscillators. The first one is a clamped mechanical oscillator, such as a cantilever, with a fixed frequency. The second one is an optically trapped nano-diamond with a built-in nitrogen-vacancy center. By coupling mechanical resonators with electron spins, we can use the spins to control the motion of mechanical oscillators. For the first setup, we discuss two different coupling mechanisms, which are magnetic coupling and strain induced coupling. We summarize their applications such as cooling the mechanical oscillator, generating entanglements between NV centers, squeezing spin ensembles etc. For the second setup, we discuss how to generate quantum superposition states with magnetic coupling, and realize matter wave interferometer. We will also review its applications as ultra-sensitive mass spectrometer. Finally, we discuss new coupling mechanisms and applications of the field. 展开更多
关键词 opto-mechanics nitrogen-vacancy center hybrid system
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Quantum Decoherence of Charge Qubit Coupled to Nonlinear Nanomechanical Resonator
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作者 陈诚 高一波 《Communications in Theoretical Physics》 SCIE CAS CSCD 2013年第11期531-534,共4页
When the nonlinearity of nanomechanical resonator is not negligible, the quantum decoherenee of charge qubit is studied analytically. Using nonlinear Jaynes-Cummings model, one explores the possibility of being quantu... When the nonlinearity of nanomechanical resonator is not negligible, the quantum decoherenee of charge qubit is studied analytically. Using nonlinear Jaynes-Cummings model, one explores the possibility of being quantum data bus for nonlinear nanomechanical resonator, the nonlinearity destroys the dynamical quantum information-storage and maintains the revival of quantum coherence of charge qubit. With the calculation of decoherence factor, we demon- strate the influence of the nonlinearity of nanomechanical resonator on engineered decoherence of charge qubit. 展开更多
关键词 quantum decoherence charge qubit nonlinear nanomechanical resonator cavity QED
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