共查询到19条相似文献,搜索用时 218 毫秒
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基于两原子同时和腔场共振作用制备两原子纠缠态的腔QED方案(英文) 总被引:1,自引:1,他引:0
我们提出了一个将两个远离的原子制备成纠缠态的腔QED方案,该方案基于两个原子同时和一个腔场发生共振作用.在这个方案里,我们利用一个事先制备好的纠缠态将另外两个分离的原子制备成纠缠态.该方案仅包含两个原子和腔场的共振相互作用,不需要用腔场存储量子信息,并且原子和腔场作用时间极短.因此,我们的方案基于目前的腔QED技术是可以实现的. 相似文献
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本文提出了一个基于SQUIDs和腔场的大失谐相互作用传送量子信息的方案,此方案可以直接地、百分之百地实现量子信息的传送.该方案中腔场和SQUIDs系统之间没有量子信息的传递,腔场只是虚激发,这样对腔的品质因子的要求大大的降低了.同时也可以在SQUIDs之间建立传送量子信息的量子网络. 相似文献
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我们提出了一个制备多腔场薛定谔猫态的新方案.在这个方案里,我们需要一个两能级原子和几个铜的单模腔.其中,原子跃迁频率与各腔场频率是大失谐的.将原子同时注入几个腔中,原子与各腔同时发生相互作用.系统按大失谐情况下J-C模型演化.着重讨论了三腔场薛定谔猫态的制备,我们的方案可以很容易被推广到多腔场薛定谔猫态的制备. 相似文献
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提出了基于腔QED的一种实验上可行的方案去实现最优普适1→2实数态量子克隆机制.在这个的方案中,三个原子中的两个同时与腔场发生作用,并且它们受经典场的作用.基于当前的腔QED技术,此方案是可以实现的. 相似文献
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利用耦合多原子同时与单模腔场的非共振相互作用,提出了一个1→2的通用量子克隆机方案.该方案装置简单,仅需三个单模腔场和一个经典场,且在制备过程中腔场可始终处于真空态.也分析了该方案在实验上的可行性. 相似文献
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腔QED制备三原子W态的一般方案 总被引:5,自引:5,他引:0
本文提出了一个基于腔QED技术的制备三原子最大W态的一般方案.通过讨论表明三个原子不论是被同时注入腔中还是在不同的时刻被注入腔中我们都能得到三原子最大W态.该方案可以在当前的技术范围内实现并且可以推广到制备n个原子的W态. 相似文献
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本文提出一个基于原子和腔场共振相互作用传送未知原子直积态的腔QED方案,原子和腔场通过J-C哈密顿量发生共振相互作用.在这个方案里,我们只需要用两个原子接受被传送的原子态以及两个单模腔作为量子通道.该方案既不需要贝尔态测量,也不需要任何操作重构纠缠初态,并且传送成功的概率为100%.这个方案也可以推广到传送n个原子的直积态. 相似文献
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CAO Shu-Ai FANG Mao-Fa ZHENG Xiao-Juan WANG Xin-Wen LI Ze-Hua 《理论物理通讯》2008,49(1):100-102
We propose an experimentally feasible scheme to implement two-player quantum game in cavity quantum electrodynamics (QED). During the process, the cavity is only virtually excited, thus our scheme is insensitive to the cavity field states and cavity decay. The scheme can be realized in the range of current cavity QED techniques. 相似文献
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ZHAN Zhi-Ming 《理论物理通讯》2009,51(1):135-138
In this paper, a theoretical scheme is proposed to implement the Deutsch-Jozsa algorithm with SQUIDs (superconducting quantum-interference devices) in cavity via Raman transition. The scheme only requires a quantized cavity field and classical microwave pulses. In this scheme, no transfer of quantum information between the SQUIDs and the cavity is required, the cavity field is only virtually excited and thus the cavity decay is suppressed. 相似文献
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N. Zhang 《International Journal of Theoretical Physics》2013,52(8):2833-2837
We investigate quantum dense coding based on entangled Bell states in cavity QED. We implement a experimentally feasible new scheme in cavity QED with atomic qubits where the atoms interact with a highly detuned cavity mode with the assistance of a classical field. The scheme is insensitive to the cavity decay and the thermal field. Based on cavity QED techniques, the scheme can be realizable. 相似文献
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Scheme to implement optimal asymmetric economical 1→3 phase-covariant telecloning via cavity QED
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<正>We propose an experimentally feasible scheme to implement the optimal asymmetric economical 1→3 phase-covariant telecloning protocol,which works without ancilla,based on cavity quantum electrodynamics(QED).The scheme is insensitive to the cavity field states and the cavity decay.In the telecloning process,the cavity is only virtually excited,it greatly prolongs the efficient decoherent time.Therefore,the scheme may be experimentally realized in the field of current cavity QED techniques. 相似文献
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A scheme is proposed for the teleportation of an unknown atomic state. The scheme is based on the resonant interaction of atoms with a coherent cavity field. The mean photon-number of the cavity field is much smaller than one and thus the cavity decay can be effectively suppressed. Another advantage of the scheme is that only one cavity is required. 相似文献
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DONG Ping SONG Wei CAO Zhuo-Liang 《理论物理通讯》2006,46(2):241-243
We propose a simple scheme for implementing Deutsch-Jozsa algorithm in cavity QED. Our scheme is insensitive to both the cavity decay and thermal field because we use the large-detuned interaction. The scheme would be important to constructing practical computer in cavity QED system. 相似文献
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An efficient scheme is proposed for the generation of atomic Schrodinger cat states in an optical cavity. Inthe scheme N three-level atoms are loaded in the optical cavity. Raman coupling of two ground states is achieved via alaser field and the cavity mode. The cavity mode is always in the vacuum state and the atoms have no probability ofbeing populated in the excited state. Thus, the scheme is insensitive to both the cavity decay and spontaneous emission. 相似文献
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In this paper, we propose a physical scheme to realize quantum SWAP gate by using a large-detuned single-mode cavity field and two identical Rydberg atoms. It is shown that the scheme can also be used to create multi-atom cluster state. During the interaction between atom and cavity, the cavity is only virtually excited and thus the scheme is insensitive to the cavity field states and cavity decay. With the help of our scheme it is very simple to prepare the N-atom cluster state with perfect fidelity and probability. The practical feasibility of this method is also discussed. 相似文献
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In this paper, we propose a physical scheme to realize quantum SWAP
gate by using a large-detuned single-mode cavity field and two
identical Rydberg atoms. It is shown that the scheme can also be used
to create multi-atom cluster state. During the interaction between
atom and cavity, the cavity is only virtually excited and thus the
scheme is insensitive to the cavity field states and cavity decay.
With the help of our scheme it is very simple to prepare the $N$-atom
cluster state with perfect fidelity and probability. The practical
feasibility of this method is also discussed. 相似文献