Corpus ID: 237941031

Comparison of quantum state protection against decoherence via weak measurement, a survey

  title={Comparison of quantum state protection against decoherence via weak measurement, a survey},
  author={Sajede Harraz and Shuang Cong and Juan J. Nieto},
One of the crucial tasks in quantum systems is to reduce the effects of decoherence due to the unavoidable interactions between a system and its environment. Many protection schemes have been proposed recently, among them the weak measurement quantum measurement reversal (WMQMR), weak measurementbased quantum feedback control (QFBC) and quantum feed-forward control (QFFC) are reviewed in this paper. By considering weak measurement, the aim is to find a balance between information gain and… Expand

Figures from this paper


Quantum Noise Protection via Weak Measurement for Quantum Mixed States
Due to the interaction with the environment, a quantum state is often affected by the different types of noises which becomes to one of the biggest problems for practical quantum computation. WeExpand
Quantum State Preparation and Protection by Measurement-Based Feedback Control Against Decoherence
We consider an open quantum system subjected to a noise channel under measurement-based feedback control and two prototypical classes of decoherence channels are considered: phase damping andExpand
Influence of monitoring efficiency on states protection using partial measurement and quantum reversal
In a recent protocol, partial measurement and quantum reversal are combined to suppress amplitude-damping decoherence. In the protocol, quantum states are monitored and then collapsed ones discardedExpand
Reexamination of the feedback control on quantum states via weak measurements
Although information gain and disturbance in quantum systems are always antagonistic in quantum theory, a recently proposed optimal feedback control system [A. M. Branczyk, P. E. M. F. Mendonca, A.Expand
Feed-forward control for quantum state protection against decoherence
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 toExpand
Protecting entanglement from decoherence via weak quantum measurement
Decoherence, often caused by unavoidable coupling with the environment, leads to degradation of quantum coherence. For a multipartite quantum system, decoherence leads to degradation of entanglementExpand
Quantum state and entanglement protection in finite temperature environment by quantum feed-forward control
We propose a quantum feed-forward control and its reversal to protect the quantum state and entanglement in a finite temperature environment. By performing weak measurement and unitary operationsExpand
Experimental feedback control of quantum systems using weak measurements.
This work experimentally explores the use of weak measurements in feedback control and finds that, despite the intrinsic difficultly of implementing them, weak measurements allow us to control the qubit better in practice than is even theoretically possible without them. Expand
State protection by quantum control before and after noise processes
We discuss the possibility of protecting the state of a quantum system that goes through noise by measurements and operations before and after the noise process. We extend our previous result onExpand
Enhance quantum teleportation under correlated amplitude damping decoherence by weak measurement and quantum measurement reversal
The results extend the ability of weak measurement as a technique in various quantum information processes which are affected by correlated noise by showing that the correlated effects enable to improve the fidelity with the given decoherence parameter. Expand