A bootstrap method using density-matrix positivity and steady-state conditions produces bounds on steady-state expectation values, the critical coupling, and the Liouvillian gap for the quantum contact process.
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Variational perturbation theory extends the radius of convergence for steady-state calculations in open quantum systems and replaces pseudo-inverse computations with LU decomposition or Krylov recycling.
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Bootstrapping Open Quantum Many-body Systems with Absorbing Phase Transitions
A bootstrap method using density-matrix positivity and steady-state conditions produces bounds on steady-state expectation values, the critical coupling, and the Liouvillian gap for the quantum contact process.
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Variational Perturbation Theory in Open Quantum Systems for Efficient Steady State Computation
Variational perturbation theory extends the radius of convergence for steady-state calculations in open quantum systems and replaces pseudo-inverse computations with LU decomposition or Krylov recycling.