Controllable coupling of superconducting transmission-line resonators
Yong Hu, Yun-Feng Xiao, Zheng-Wei Zhou, Guang-Can Guo
DOI 10.1103/PhysRevA.75.012314 · Physical Review A
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Abstract
Realization of controllable interaction between subsystems is one of the major problems in solid-state quantum computing. We study a current-biased Josephson junction (CBJJ) as a tunable coupler for superconducting transmission-line resonators (TLR). By modulating the bias current, the junction can be tuned in and out of resonance with the TLRs connected to it. Various inter-TLR quantum operations can be reliably implemented by controlling the mediating CBJJ. The main decoherence sources are analyzed in detail. This work may offer improvement to scalable quantum computing in coupled TLR-cavity array system.
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