Zeno and anti-Zeno effects in spin-bath models

Journal Article · Sun Jul 15 00:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.76.012109· OSTI ID:21011156

Segal, Dvira; Reichman, David R ^[1]

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1. Department of Chemistry, Columbia University, 3000 Broadway, New York, New York 10027 (United States)

We investigate the quantum Zeno and anti-Zeno effects in spin bath models: the spin-boson model and a spin-fermion model. We show that the Zeno-anti-Zeno transition is critically controlled by the system-bath coupling parameter, the same parameter that determines spin decoherence rate. We also discuss the crossover in a biased system, at high temperatures, and for a nonequilibrium spin-fermion system, manifesting the counteracting roles of electrical bias, temperature, and magnetic field on the spin decoherence rate.

• OSTI ID: 21011156
• Journal Information: Physical Review. A, Vol. 76, Issue 1; Other Information: DOI: 10.1103/PhysRevA.76.012109; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSONS
COUPLING
ELECTRIC FIELDS
FERMIONS
MAGNETIC FIELDS
QUANTUM DECOHERENCE
QUANTUM MECHANICS
SIMULATION
SPIN
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0400-1000 K