We analyze the phase diagram of a quantum particle confined to a finite chain and subjected to a dissipative environment described by an ohmic spectral function. Analytical and numerical techniques are employed to explore both the perturbative and nonperturbative regimes of the model. For small dissipation of the coupling to the environment leads to a narrowing of the density distribution and to a displacement toward 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.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - Aug 28 2008|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics