Freiburg 2024 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 47: Open Quantum Systems

Q 47.1: Talk

Thursday, March 14, 2024, 11:00–11:15, HS 3219

Optimal Cooling in Markovian Quantum Systems — •Emanuel Malvetti — School of Natural Sciences, Technische Universität München, 85737 Garching, Germany — Munich Center for Quantum Science and Technology & Munich Quantum Valley, 80799 München, Germany

We address the task of cooling a Markovian quantum system to a pure state. Here the system drift takes the form of a Lindblad master equation and we assume fast control over the unitary group. This setting allows for a natural reduction of the control system to the eigenvalues of the state density matrix. We give a simple necessary and sufficient characterization of systems which are (asymptotically) coolable, and present explicit time-optimal cooling protocols for chosen low-dimensional systems. As an outlook we connect the task of cooling subsystems to embedding non-Markovian dynamics using a Markovian shell.

Keywords: Cooling; Markovianity; Lindblad Equation; Optimal Control