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BIBTEX RIS

Nonadiabatic Coherent Evolution of Two-Level Systems under Spontaneous Decay

2009; American Physical Society; Volume: 102; Issue: 7 Linguagem: Inglês

10.1103/physrevlett.102.073008

ISSN

1092-0145

Autores

F. O. Prado, Eduardo I. Duzzioni, M. H. Y. Moussa, N. G. de Almeida, Celso J. Villas-Bôas,

Tópico(s)

Spectroscopy and Quantum Chemical Studies

Resumo

In this Letter we extend current perspectives in engineering reservoirs by producing a time-dependent master equation leading to a nonstationary superposition equilibrium state that can be nonadiabatically controlled by the system-reservoir parameters. Working with an ion trapped inside a nonideal cavity, we first engineer effective interactions, which allow us to achieve two classes of decoherence-free evolution of superpositions of the ground and excited ionic levels: those with a time-dependent azimuthal or polar angle. As an application, we generalize the purpose of an earlier study [Phys. Rev. Lett. 96, 150403 (2006)10.1103/PhysRevLett.96.150403], showing how to observe the geometric phases acquired by the protected nonstationary states even under nonadiabatic evolution.

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