Rotation gate for a three-level superconducting quantum interference device qubit with resonant interaction

Journal Article · Sun Oct 15 00:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.74.044302· OSTI ID:20863990

Yang, C -P; Siyuan, Han ^[1]

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1. Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045 (United States)

We show a way to realize an arbitrary rotation gate in a three-level superconducting quantum interference device (SQUID) qubit using resonant interaction. In this approach, the two logical states of the qubit are represented by the two lowest levels of the SQUID and a higher-energy intermediate level is utilized for the gate manipulation. By considering spontaneous decay from the intermediate level during the gate operation, we present a formula for calculating average fidelity over all possible initial states. Finally, based on realistic system parameters, we show that an arbitrary rotation gate can be achieved with a high fidelity in a SQUID.

• OSTI ID: 20863990
• Journal Information: Physical Review. A, Vol. 74, Issue 4; Other Information: DOI: 10.1103/PhysRevA.74.044302; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DECAY
ENERGY LEVELS
OPERATION
QUANTUM COMPUTERS
QUBITS
ROTATION
SQUID DEVICES