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Geometric phase induced by a cyclically evolving squeezed vacuum reservoir (Articolo in rivista)

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Geometric phase induced by a cyclically evolving squeezed vacuum reservoir (Articolo in rivista) (literal)

Anno

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Carollo, A; Palma, GM; Lozinski, A; Santos, MF; Vedral, V (2006)
Geometric phase induced by a cyclically evolving squeezed vacuum reservoir
in Physical review letters (Print)
(literal)

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Univ Cambridge, Ctr Quantum Computac, DAMTP, Cambridge CB3 0WA, England; Innsbruck Univ, Inst Theoret Phys, A-6020 Innsbruck, Austria; Univ Milan, NEST, I-26013 Crema, CR, Italy; Univ Milan, Dipartimento Tecnol Informaz, I-26013 Crema, CR, Italy; Univ Palermo, Dipartimento Sci Fis & Astron, I-90123 Palermo, Italy; Univ Fed Minas Gerais, Belo Horizonte, MG, Brazil; Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England (literal)

Titolo

Geometric phase induced by a cyclically evolving squeezed vacuum reservoir (literal)

Abstract

We propose a new way to generate an observable geometric phase by means of a completely incoherent phenomenon. We show how to imprint a geometric phase to a system by adiabatically manipulating the environment with which it interacts. As a specific scheme, we analyze a multilevel atom interacting with a broadband squeezed vacuum bosonic bath. As the squeezing parameters are smoothly changed in time along a closed loop, the ground state of the system acquires a geometric phase. We also propose a scheme to measure such a geometric phase by means of a suitable polarization detection. (literal)

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