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arXiv · 0711.1325

Phase diagram of the dissipative quantum particle in a box

J. Sabio·L. Borda·F. Guinea·F. Sols
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Abstract

We analyze the phase diagram of a quantum particle confined to a finite chain, subject to a dissipative environment described by an Ohmic spectral function. Analytical and numerical techniques are employed to explore both the perturbative and non-perturbative regime of the model. For small dissipation the coupling to the environment leads to a narrowing of the density distribution, and to a displacement towards the center of the array of accessible sites. For large values of the dissipation, we find a phase transition to a doubly degenerate phase which reflects the formation of an inhomogeneous effective potential within the array.

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J. Sabio, L. Borda, F. Guinea, F. Sols. 2009-01-16. Phase diagram of the dissipative quantum particle in a box. https://doi.org/10.1103/physrevb.78.085439

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