A large variational calculation places the dissipation-driven localization transition of two qubits in a common Ohmic bath at alpha_c = 0.316(8), and predicts a first-order transition for strong antiferromagnetic coupling.
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Variational study of two-impurity spin-boson model with a common Ohmic bath: Ground-state phase transitions
A large variational calculation places the dissipation-driven localization transition of two qubits in a common Ohmic bath at alpha_c = 0.316(8), and predicts a first-order transition for strong antiferromagnetic coupling.