Quantum logical gates with four-level superconducting quantum interference devices coupled to a superconducting resonator

Journal Article · Sun Aug 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.024301· OSTI ID:21448591

Xiaoling, He; Junyan, Luo ^[1]; Chuiping, Yang ^[2]; Sheng, Li ^[3]; Siyuan, Han ^[4]

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1. School of Science, Zhejiang University of Science and Technology, Hangzhou, Zhejiang 310023 (China)
2. Department of Physics, Hangzhou Normal University, Hangzhou, Zhejiang 310036 (China)
3. Department of Physics, Zhejiang Normal University, Jinhua, Zhejiang 321004 (China)
4. Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045 (United States)

We propose a way for realizing a two-qubit controlled phase gate with superconducting quantum interference devices (SQUIDs) coupled to a superconducting resonator. In this proposal, the two lowest levels of each SQUID serve as the logical states and two intermediate levels of each SQUID are used for the gate realization. We show that neither adjustment of SQUID level spacings during the gate operation nor uniformity in SQUID parameters is required by this proposal. In addition, this proposal does not require the adiabatic passage or a second-order detuning and thus the gate is much faster.

• OSTI ID: 21448591
• Journal Information: Physical Review. A, Vol. 82, Issue 2; Other Information: DOI: 10.1103/PhysRevA.82.024301; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
74 ATOMIC AND MOLECULAR PHYSICS
ENERGY LEVELS
OPERATION
QUANTUM STATES
QUBITS
SQUID DEVICES
SUPERCONDUCTING CAVITY RESONATORS
CAVITY RESONATORS
ELECTRONIC EQUIPMENT
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FLUXMETERS
INFORMATION
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
QUANTUM INFORMATION
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