Superconducting qubit as a quantum transformer routing entanglement between a microscopic quantum memory and a macroscopic resonator
Superconducting qubit as a quantum transformer routing entanglement between a microscopic quantum memory and a macroscopic resonator
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DOI：
10.1103/physrevb.84.104505
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发表时间：
2010-08
影响因子：
3.7
通讯作者：
A. Kemp;S. Saito;W. Munro;K. Nemoto;K. Semba
中科院分区：
文献类型：
--
作者：
A. Kemp;S. Saito;W. Munro;K. Nemoto;K. Semba
We demonstrate experimentally the creation and measurement of an entangled state between a microscopic two-level system (TLS), formed by a defect in an oxide layer, and a macroscopic superconducting resonator, where their indirect interaction is mediated by an artificial atom, a superconducting persistent current qubit (PCQB). Under appropriate conditions, we found the coherence time of the TLS, the resonator, and the entangled state of these two are significantly longer than the Ramsey dephasing time of PCQB itself. This demonstrates that a PCQB can be used as a quantum transformer to address high coherence microscopic quantum memories by connecting them to macroscopic quantum buses.
