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DC transport in a dissipative superconducting quantum point contact
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We study the current-voltage characteristics of a superconducting junction with particle losses at the contacts. We adopt the Keldysh formalism to compute the steady-state current for varying transmission of the contact. In the low transmission regime, the dissipation leads to an enhancement of the current at low bias, a nonmonotonic dependence of current on dissipation, and the emergence of new structures in the current-voltage curves. The effect of dissipation by particle loss is found to be qualitatively different from that of a finite temperature and a finite inelastic scattering rate in the reservoirs.
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Dissipative Kondo physics in the Anderson Impurity Model with two-body losses
Two-body losses in an Anderson impurity preserve Kondo correlations at weak and strong dissipation while destroying them at intermediate rates.
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