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One-step transfer or exchange of arbitrary multipartite quantum states with a single-qubit coupler
Yang, Chui-Ping ; Su, Qi-Ping ; Zheng, Shi-Biao ; Han, Siyuan
Yang, Chui-Ping
Su, Qi-Ping
Zheng, Shi-Biao
Han, Siyuan
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Abstract
The transfer or exchange of multipartite quantum states is critical to the realization of large-scale quantum
information processing and quantum communication. In thiswork,we demonstrate that by using a single quantum
two-level system—a qubit—as a coupler, arbitrary multipartite quantum states (either entangled or separable)
can be transferred or exchanged simultaneously between two sets of qubits. During the entire process, the coupler
remains unexcited minimizing the effect of coupler decoherence on the process. This feature allows one to use
qubits with rapid frequency tunability and a large range of frequency tuning, such as phase qubits, as couplers.
Our findings offer the potential to significantly reduce the resources needed to construct and operate large-scale
quantum information networks consisting of many multiqubit registers, memory cells, and processing units.
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This is the published version. Copyright 2015 Elsevier
Date
2015-08-18
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Elsevier
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Yang, Chui-Ping, Qi-Ping Su, Shi-Biao Zheng, and Siyuan Han. "One-step Transfer or Exchange of Arbitrary Multipartite Quantum States with a Single-qubit Coupler." Phys. Rev. B Physical Review B 92.5 (2015): n. pag. http://dx.doi.org/10.1103/PhysRevB.92.054509