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

An all-optical quantum gate in a semiconductor quantum dot.

Xiaoqin Li1, Yanwen Wu, Duncan Steel

  • 1Frontiers in Optical Coherent and Ultrafast Science (FOCUS), Harrison M. Randall Laboratory of Physics, The University of Michigan, Ann Arbor, Michigan 48109-1120, USA.

Science (New York, N.Y.)
|August 9, 2003
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

An updated multigene phylogeny of <i>Leotiomycetes</i>.

Persoonia·2026
Same author

Global diversity analysis of plant-associated <i>Pseudopithomyces</i> fungi reveals a new species producing the toxin associated with facial eczema in livestock: <i>Pseudopithomyces toxicarius sp. nov</i>.

Studies in mycology·2026
Same author

Historical cultures provide insights into the taxonomy of <i>Stictis sensu lato</i>.

Fungal systematics and evolution·2025
Same author

Magnetic Susceptibility of Andreev Bound States in Superfluid ^{3}He-B.

Physical review letters·2023
Same author

Publisher Correction: Phonon renormalization in reconstructed MoS<sub>2</sub> moiré superlattices.

Nature materials·2021
Same author

Gain-of-function variants in SYK cause immune dysregulation and systemic inflammation in humans and mice.

Nature genetics·2021
Same journal

Erratum for the Research Article "Detecting supramolecular organic nanoparticles during heat wave".

Science (New York, N.Y.)·2026
Same journal

Local signals, systemic decline.

Science (New York, N.Y.)·2026
Same journal

The mechanics of liver regeneration.

Science (New York, N.Y.)·2026
Same journal

Computing in a memory with physics.

Science (New York, N.Y.)·2026
Same journal

Retraction.

Science (New York, N.Y.)·2026
Same journal

Making time.

Science (New York, N.Y.)·2026
See all related articles

Scientists achieved coherent optical control of a biexciton (two electron-hole pairs) in a quantum dot, enabling a two-bit quantum logic gate. This breakthrough is crucial for scalable quantum computation using optical control of spin qubits.

Area of Science:

  • Quantum Information Science
  • Solid-State Physics
  • Optics

Background:

  • Quantum dots confine excitons, acting as potential qubits.
  • Coherent control of single excitons (Rabi rotation) has been demonstrated.
  • Biexcitons, pairs of excitons, offer possibilities for multi-qubit operations.

Purpose of the Study:

  • To demonstrate coherent optical control of biexcitons in a single quantum dot.
  • To establish the foundation for a two-bit conditional quantum logic gate.
  • To evaluate the fidelity of the proposed quantum gate operation.

Main Methods:

  • Utilizing pulsed laser excitation for coherent optical control.
  • Observing Rabi flopping dynamics in the biexciton system.
  • Implementing and analyzing a two-bit conditional quantum logic gate based on exciton interactions.

Related Experiment Videos

Main Results:

  • Achieved coherent oscillations of biexcitons, analogous to atomic Rabi flopping.
  • Demonstrated a two-bit all-optical quantum logic gate using interacting excitons as qubits.
  • Attained a gate fidelity of 0.7 for the implemented quantum logic operation.

Conclusions:

  • Coherent control of biexcitons is experimentally feasible.
  • This control forms the basis for all-optical quantum gates.
  • The demonstrated capability is essential for scalable quantum computation via optical control of spin qubits in quantum dots.