Nonadiabatic geometric phase induced by a counterpart of the Stark shift
Abstract
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.
- Publication:
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EPL (Europhysics Letters)
- Pub Date:
- October 2005
- DOI:
- 10.1209/epl/i2005-10209-9
- arXiv:
- arXiv:quant-ph/0407093
- Bibcode:
- 2005EL.....72...21D
- Keywords:
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- Quantum Physics
- E-Print:
- Europhysics Letters 72, 21 (2005)