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Symmetry-breaking transition in a two-level system coupled to an Ohmic bath: A squeezed-state approach

Dutta, Biswadeb and Jayannavar, AM (1994) Symmetry-breaking transition in a two-level system coupled to an Ohmic bath: A squeezed-state approach. In: Physical Review B: Condensed Matter, 49 (5). pp. 3604-3607.

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Official URL: http://prb.aps.org/abstract/PRB/v49/i5/p3604_1

Abstract

Displaced squeezed states are proposed as variational ground states for phonons (Bose fields) coupled to two-level systems (spin systems). We have investigated the zero-temperature phase diagram for the localization-delocalization transition of a tunneling particle interacting with an Ohmic heat bath. Our results are compared with known existing approximate treatments. A modified phase diagram using the displaced squeezed state is presented.

Item Type: Editorials/Short Communications
Additional Information: Copyright of this article belongs to The american physical society.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 13 Apr 2011 06:51
Last Modified: 13 Apr 2011 06:51
URI: http://eprints.iisc.ernet.in/id/eprint/36848

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