Unraveling coherent quantum feedback for Pyragas control
| Autor: | Florian Katsch, Andreas Knorr, Julia Kabuss, Alexander Carmele |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Physics
Quantum optics Quantum Physics Photon Differential equation FOS: Physical sciences Statistical and Nonlinear Physics Observable Quantum entanglement 01 natural sciences Atomic and Molecular Physics and Optics 010305 fluids & plasmas Open quantum system Classical mechanics 0103 physical sciences Quantum information Quantum Physics (quant-ph) 010306 general physics Quantum |
| Popis: | We present a Heisenberg operator based formulation of coherent quantum feedback and Pyragas control. This model is easy to implement and allows for an efficient and fast calculation of the dynamics of feedback-driven observables as the number of contributing correlations grows in systems with a fixed number of excitations only linearly in time. Furthermore, our model unravels the quantum kinetics of entanglement growth in the system by explicitly calculating non-Markovian multi-time correlations, e.g., how the emission of a photon is correlated with an absorption process in the past. Therefore, the time-delayed differential equations are expressed in terms of insightful physical quantities. Another considerate advantage of this method is its compatibility to typical approximation schemes, such as factorization techniques and the semi-classical treatment of coherent fields. This allows the application on a variety of setups, ranging from closed quantum systems in the few excitation regimes to open systems and Pyragas control in general. 4 Figures |
| Databáze: | OpenAIRE |
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