Stabilizing spin coherence through environmental entanglement in strongly dissipative quantum systems
Soumya Bera, Serge Florens, Harold U. Baranger, Nicolas Roch, Ahsan Nazir, Alex W. Chin · Physical Review B · 2014
The authors propose an entangled variational coherent-state expansion for the ground state of the Ohmic spin-boson model, and observe a surprisingly dramatic influence of environmental entanglement on qubit coherence.