Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Rapid state reduction of quantum systems using feedback control.

Joshua Combes1, Kurt Jacobs

  • 1Centre for Quantum Computer Technology, Centre for Quantum Dynamics, School of Science, Griffith University, Nathan 4111, Australia.

Physical Review Letters
|February 21, 2006
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Phase-Dependent Squeezing in Dual-Comb Interferometry.

Physical review letters·2026
Same author

Noise Constraints on Sensitivity Scaling in Quantum Nonlinear Metrology.

Physical review letters·2025
Same author

Quantum-enhanced multiparameter sensing in a single mode.

Science advances·2025
Same author

Heisenberg-Limited Continuous-Variable Distributed Quantum Metrology with Arbitrary Weights.

Physical review letters·2025
Same author

Squeezed dual-comb spectroscopy.

Science (New York, N.Y.)·2025
Same author

A spin-refrigerated cavity quantum electrodynamic sensor.

Nature communications·2024
Same journal

Erratum: Bacterial Turbulence at Compressible Fluid Interfaces [Phys. Rev. Lett. 136, 138301 (2026)].

Physical review letters·2026
Same journal

Unveiling Light-Quark Yukawa Flavor Structure via Dihadron Fragmentation at Lepton Colliders.

Physical review letters·2026
Same journal

Adaptable Route to Fast Coherent State Transport via Bang-Bang-Bang Protocols.

Physical review letters·2026
Same journal

Topological Transition and Emergence of Elasticity of Dislocation in Skyrmion Lattice: Beyond Kittel's Magnetic-Polar Analogy.

Physical review letters·2026
Same journal

Pound-Drever-Hall Method for Superconducting-Qubit Readout.

Physical review letters·2026
Same journal

Coupling a ^{73}Ge Nuclear Spin to an Electrostatically Defined Quantum Dot in Silicon.

Physical review letters·2026
See all related articles

Hamiltonian feedback control accelerates quantum state purification. This method can at least double the speed of preparing pure quantum states using continuous measurements.

Area of Science:

  • Quantum physics
  • Quantum information science

Background:

  • Quantum systems naturally evolve and interact with their environment.
  • Preparing pure quantum states is crucial for quantum computing and metrology.
  • Continuous measurement is a technique used to infer information about a quantum system.

Purpose of the Study:

  • To investigate the use of Hamiltonian feedback control.
  • To enhance the speed of quantum state purification via continuous measurement.
  • To accelerate the preparation of pure quantum states.

Main Methods:

  • Utilizing Hamiltonian feedback control strategies.
  • Analyzing the dynamics of quantum state reduction under continuous measurement.
  • Developing a feedback algorithm for observables with equispaced eigenvalues.

Related Experiment Videos

Main Results:

  • A feedback algorithm is shown to exist for speeding up state reduction.
  • The proposed method achieves a speed-up factor of at least 2(N + 1)/3.
  • Demonstrated enhancement in the rate of purifying quantum states.

Conclusions:

  • Hamiltonian feedback control offers a viable strategy for faster quantum state preparation.
  • The developed algorithm provides a significant speed-up for specific measurement types.
  • This research contributes to advancing techniques in quantum information processing.