Feed-forward control for quantum state protection against decoherence
arXiv:1402.4921 · doi:10.1103/PhysRevA.89.032303
Abstract
We propose a novel scheme of feed-forward control and its reversal for protecting quantum state against decoherence. Before the noise channel our pre-weak measurement and feed-forward are just to change the protected state into the state almost immune to the noise channel, and after the channel our reversed operations and post-weak measurements are just to restore the protected state. Unlike most previous state protection schemes, ours only concerns the noise channel and does not care about the protected state. We show that our scheme can effectively protect unknown states, nonorthogonal states and entangled states against amplitude damping noise. Our scheme has dramatic merits of protecting quantum states against heavy amplitude damping noise, and can perfectly protect some specific nonorthogonal states in an almost deterministic way, which might be found some applications in current quantum communication technology. And it is most important that our scheme is experimentally available with current technology.
References in corpus (25)
- Good Quantum Error-Correcting Codes Exist
- Decoherence Free Subspaces for Quantum Computation
- Dynamical Decoupling of Open Quantum Systems
- Experimental Realization of Teleporting an Unknown Pure Quantum State via Dual Classical and Einstein-Podolski-Rosen Channels
- Dynamical suppression of decoherence in two-state quantum systems
- Noiseless Quantum Codes
- Experimental long-lived entanglement of two macroscopic objects
- Quantum Computers and Dissipation
- Experimental Demonstration of Blind Quantum Computing
- Correlations and Counting Statistics of an Atom Laser
- Symmetrizing Evolutions
- Adaptive homodyne measurement of optical phase
- Decoherence suppression by uncollapsing
- Experimental feedback control of quantum systems using weak measurements
- Stabilising entanglement by quantum jump-based feedback
- Controlling entanglement by direct quantum feedback
- Bayesian feedback versus Markovian feedback in a two-level atom
- Capture and release of a conditional state of a cavity QED system by quantum feedback
- Quantum Cryptography
- Quantum Control of a Single Qubit
- Improving the fidelity of teleportation through noisy channels using weak measurement
- Markovian feedback to control continuous variable entanglement
- A sequence of unsharp measurements enabling a real time visualization of a quantum oscillation
- Measurement-based direct quantum feedback control in an open quantum system
- Extended Techniques for Feedback Control of A Single Qubit
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- Discriminating two nonorthogonal states against a noise channel by feed-forward control
- Protected State Transfer via an Approximate Quantum Adder
- Protecting an unknown qubit state by weak measurement
- On the role of the measurement apparatus in quantum measurements
- Realizing the Petz Recovery Map on an NMR Quantum Processor