Fidelity optimization for holonomic quantum gates in dissipative environments

Journal Article · Mon May 15 00:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.73.0· OSTI ID:20787221

Parodi, Daniele; Solinas, Paolo; Zanghi, Nino ^[1]; Sassetti, Maura ^[1]; Zanardi, Paolo ^[2]

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1. Dipartimento di Fisica, Universita di Genova, Via Dodecaneso 33, 16146 Genova (Italy)
2. Institute for Scientific Interchange, Viale Settimio Severo 65, 10133 Turin (Italy)

We analyze the performance of holonomic quantum gates in semiconductor quantum dots, driven by ultrafast lasers, under the effect of a dissipative environment. The environment is modeled as a thermal bath of oscillators linearly coupled with the electron states of the quantum dot. Standard techniques make the problem amenable to a numerical treatment and allow one to determine the fidelity as a function of all the relevant physical parameters. As a consequence of our analysis, we show that the disturbance of the environment can be (approximately) suppressed and the performance of the gate optimized--provided that the thermal bath is purely super-Ohmic. We conclude by showing that such an optimization is impossible for Ohmic environments.

• OSTI ID: 20787221
• Journal Information: Physical Review. A, Vol. 73, Issue 5; Other Information: DOI: 10.1103/PhysRevA.73.052304; (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
DISTURBANCES
ELECTRONS
ENERGY LEVELS
GATING CIRCUITS
INFORMATION THEORY
LASER RADIATION
OPTIMIZATION
OSCILLATORS
PERFORMANCE
QUANTUM DOTS
QUANTUM MECHANICS
SEMICONDUCTOR MATERIALS