Feedback Control Using Only Quantum Back-Action
arXiv:0904.3745 · doi:10.1088/1367-2630/12/4/043005
Abstract
The traditional approach to feedback control is to apply forces to a system by modifying the Hamiltonian. Here we show that quantum systems can be controlled without any Hamiltonian feedback, purely by exploiting the random quantum back-action of a continuous weak measurement. We demonstrate that, quite remarkably, the quantum back-action of such an adaptive measurement is just as effective at controlling quantum systems as traditional feedback.
4 pages, revtex4, 3 eps figures
References in corpus (14)
- Strong dispersive coupling of a high finesse cavity to a micromechanical membrane
- Entanglement-free Heisenberg-limited phase estimation
- A Straightforward Introduction to Continuous Quantum Measurement
- Generating Single Microwave Photons in a Circuit
- Feedback control of quantum state reduction
- Coherent quantum LQG control
- Back-action evasion and squeezing of a mechanical resonator using a cavity detector
- Quantum control by von Neumann measurements
- Reconsidering Rapid Qubit Purification by Feedback
- Engineering Superposition States and Tailored Probes for Nano-resonators Via Open-Loop Control
- Control of quantum dynamics by optimized measurements
- Locally Optimal Control of Quantum Systems with Strong Feedback
- Quantum Feedback Control: How to use Verification Theorems and Viscosity Solutions to Find Optimal Protocols
- Guidance and Control in a Josephson Charge Qubit
Cited by in corpus (22)
- Control of quantum phenomena: Past, present, and future
- Quantum feedback: theory, experiments, and applications
- Control-free control: manipulating a quantum system using only a limited set of measurements
- Incoherent qubit control using the quantum Zeno effect
- Preparation of three-dimensional entanglement for distant atoms in coupled cavities via atomic spontaneous emission and cavity decay
- Structure identification and state initialization of spin networks with limited access
- Many-body state engineering using measurements and fixed unitary dynamics
- Measurement-driven navigation in many-body Hilbert space: Active-decision steering
- Optimized Steering: Quantum State Engineering and Exceptional Points
- Deterministic creation and stabilization of entanglement in circuit QED by homodyne-mediated feedback control
- Enhancement of quantum synchronization via continuous measurement and feedback control
- Quantum Control with Measurements and Quantum Zeno Dynamics
- Spontaneous symmetry breaking induced by quantum monitoring
- Engineering two-qubit mixed states with weak measurements
- Coherent vs. measurement-based feedback for controlling a single qubit
- Robust Adaptive measurement for qubit state preparation
- Limits of optimal control yields achievable with quantum controllers
- Coupling rotational and translational motion via a continuous measurement in an optomechanical sphere
- Feedback Policies for Measurement-based Quantum State Manipulation
- Controlling quantum flux through measurement: an idealised example
- Conditional control of quantum beats in a cavity QED system
- Optimal measurement-based feedback control for a single qubit: a candidate protocol