Coherent feedback control in quantum transport
arXiv:1407.1306 · doi:10.1103/PhysRevB.90.205436
Abstract
We discuss control of the quantum-transport properties of a mesoscopic device by connecting it in a coherent feedback loop with a quantum-mechanical controller. We work in a scattering approach and derive results for the combined scattering matrix of the device-controller system and determine the conditions under which the controller can exert ideal control on the output characteristics. As concrete example we consider the use of feedback to optimise the conductance of a chaotic quantum dot and investigate effects of controller dimension and decoherence. In both respects we find that the performance of the feedback geometry is well in excess of that offered by a simple series configuration.
8 pages; 7 figures
References in corpus (10)
- Coherent quantum LQG control
- Thermodynamics of a physical model implementing a Maxwell demon
- Direct measurement of the coherence length of edge states in the Integer Quantum Hall Regime
- Coherent-feedback quantum control with a dynamic compensator
- Quantum Feedback Networks: Hamiltonian Formulation
- Decoherence and single electron charging in an electronic Mach-Zehnder interferometer
- Stochastic thermodynamics for "Maxwell demon" feedbacks
- Linear Quantum Feedback Networks
- Charge Qubit Purification by an Electronic Feedback Loop
- Reverse quantum state engineering using electronic feedback loops