Optimizing for an arbitrary perfect entangler. II. Application

Goerz, Michael H.; Gualdi, Giulia; Reich, Daniel M.; Koch, Christiane P.; Motzoi, Felix; Whaley, K. Birgitta; Vala, Jiří; Müller, Matthias M.; Montangero, Simone; Calarco, Tommaso

doi:10.1103/physreva.91.062307

Optimizing for an arbitrary perfect entangler. II. Application

Journal Article · Mon Jun 08 00:00:00 EDT 2015 · Physical Review A - Atomic, Molecular, and Optical Physics

DOI:https://doi.org/10.1103/physreva.91.062307· OSTI ID:1642662

Goerz, Michael H. ^[1]; Gualdi, Giulia ^[1]; Reich, Daniel M. ^[1]; Koch, Christiane P. ^[1]; Motzoi, Felix ^[2]; Whaley, K. Birgitta ^[2]; Vala, Jiří ^[3]; Müller, Matthias M. ^[4]; Montangero, Simone ^[4]; Calarco, Tommaso ^[4]

Univ. Kassel (Germany). Theoretische Physik
Univ. of California, Berkeley, CA (United States). Dept. of Chemistry
National Univ. of Ireland, Maynooth (Ireland). Dept. of Mathematical Physics; Dublin Inst. for Advanced Studies (Ireland). School of Theoretical Physics
Univ. Ulm (Germany). Inst. for Complex Quantum Systems

The difficulty of an optimization task in quantum information science depends on the proper mathematical expression of the physical target. In this paper we demonstrate the power of optimization functionals targeting an arbitrary perfect two-qubit entangler, which allow generation of a maximally entangled state from some initial product state. We show for two quantum information platforms of current interest, i.e., nitrogen vacancy centers in diamond and superconducting Josephson junctions, that an arbitrary perfect entangler can be reached faster and with higher fidelity than both specific two-qubit gates and local equivalence classes of two-qubit gates. Our results are obtained using two independent optimization approaches, underscoring the critical role of the optimization target.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: European Comission (EC); German Academic Exchange Service (DAAD); National Science Foundation (NSF); Science Foundation Ireland; USDOE Office of Science (SC)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1642662

Journal Information:: Physical Review A - Atomic, Molecular, and Optical Physics, Journal Name: Physical Review A - Atomic, Molecular, and Optical Physics Journal Issue: 6 Vol. 91; ISSN 1050-2947

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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