| Issue |
Europhys. Lett.
Volume 72, Number 1, October 2005
|
|
|---|---|---|
| Page(s) | 21 - 27 | |
| Section | General | |
| DOI | https://doi.org/10.1209/epl/i2005-10209-9 | |
| Published online | 31 August 2005 | |
Nonadiabatic geometric phase induced by a counterpart of the Stark shift
1
Departamento de Física, Universidade Federal de São Carlos P.O. Box 676, São Carlos, 13565-905, São Paulo, Brazil
2
Optics Section, The Blackett Laboratory, Imperial College - London SW7 2BZ, UK
Corresponding authors: duzzioni@df.ufscar.br serra@df.ufscar.br
Received:
20
January
2005
Accepted:
4
August
2005
We analyse the geometric phase due to the Stark shift in a system composed of a bosonic field, driven by time-dependent linear amplification, interacting dispersively with a two-level (fermionic) system. We show that a geometric phase factor in the joint state of the system, which depends on the fermionic state (resulting form the Stark shift), is introduced by the amplification process. A clear geometrical interpretation of this phenomenon is provided. We also show how to measure this effect in an interferometric experiment and to generate geometric “Schrödinger cat”-like states. Finally, considering the currently available technology, we discuss a feasible scheme to control and measure such geometric phases in the context of cavity quantum electrodynamics.
PACS: 03.65.Vf – Phases: geometric; dynamic or topological / 42.50.Ct – Quantum description of interaction of light and matter; related experiments / 42.50.Pq – Cavity quantum electrodynamics; micromasers
© EDP Sciences, 2005
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