期刊
PHYSICAL REVIEW LETTERS
卷 102, 期 20, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.200402
关键词
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资金
- University of Karlsruhe
- Swiss National Science Foundation (SNF)
- ETH Zurich
- EC
- CIFAR
- MRI
- MITACS
- NSERC
Quantum state tomography is an important tool in quantum information science for complete characterization of multiqubit states and their correlations. Here we report a method to perform a joint simultaneous readout of two superconducting qubits dispersively coupled to the same mode of a microwave transmission line resonator. The nonlinear dependence of the resonator transmission on the qubit state dependent cavity frequency allows us to extract the full two-qubit correlations without the need for single-shot readout of individual qubits. We employ standard tomographic techniques to reconstruct the density matrix of two-qubit quantum states.
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