Smeared quantum phase transition in the dissipative random quantum Ising model

Details Smeared quantum phase transition in the dissipative random quantum Ising model Smeared quantum phase transition in the dissipative random quantum Ising model

2008-11-23

arxiv.org/abs/0811.3754v2

Physica E 42, 383-387 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, 10 eps figures embedded, final version as published

Scientific paper

We investigate the quantum phase transition in the random transverse-field Ising model under the influence of Ohmic dissipation. To this end, we numerically implement a strong-disorder renormalization-group scheme. We find that Ohmic dissipation destroys the quantum critical point and the associated quantum Griffiths phase by smearing. Our results quantitatively confirm a recent theory [Phys. Rev. Lett. {\bf 100}, 240601 (2008)] of smeared quantum phase transitions.

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