Abstract
This thesis devolops a general formalism for continuous feedback control in quantum systems. The main result is a quantum Fokker-Planck master equation describing the joint dynamics of a quantum system and a detector with finite bandwidth. For a fast detector, this equation can be reduced to a Markovian master equation for the system dynamics. In particular, the formalism is amenable to analytical treatments of feedback protocols that depend nonlinearly on the measured signal. Previously, only numerical methods were available for this. We apply the formalism on two toy models to highlight its usefuleness. We find that the formalism provides insight into the connection between thermodynamics and information theory.
| Original language | English |
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| Qualification | Licentiate |
| Supervisors/Advisors |
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| Award date | 2022 Oct 21 |
| Place of Publication | Lund |
| Publisher | |
| ISBN (Print) | 978-91-8039-372-0 |
| ISBN (electronic) | 978-91-8039-371-3 |
| Publication status | Published - 2022 Aug 29 |
Subject classification (UKÄ)
- Other Physics Topics
- Control Engineering
Free keywords
- Quantum measurements
- Quantum control
- Stochastic thermodynamics
- Information thermodynamics
- Full counting statistics
- Open quantum systems