Fast quantum phase gate in a small-detuning circuit QED model

Journal Article · Thu Jul 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.014303· OSTI ID:21443040

Chunwang, Wu; Yang, Han; Hongyi, Li; Zhijiao, Deng; Pingxing, Chen; Chengzu, Li ^[1]

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1. College of Science, National University of Defense Technology, Changsha 410073 (China)

We propose a theoretical protocol for a quantum phase gate between two transmon qubits capacitively coupled to a superconducting transmission line resonator driven by a strong microwave field. Compared with previous protocols involving a dispersive regime, our protocol works at a small detuning, {Delta}{approx}g, and the nontrivial two-qubit gates can be realized in a short time, {approx}1/g, where g is the qubit-resonator coupling strength. Our analysis shows that the protocol is robust against the main decoherence sources and unavoidable parameter variations. Moreover, our protocol can be implemented using the current experimental design of circuit QED.

• OSTI ID: 21443040
• Journal Information: Physical Review. A, Vol. 82, Issue 1; Other Information: DOI: 10.1103/PhysRevA.82.014303; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

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QUANTUM STATES
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ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
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