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Related Experiment Video

Updated: Jun 22, 2026

Gradient Echo Quantum Memory in Warm Atomic Vapor
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Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

Mesoscopic Rydberg gate based on electromagnetically induced transparency.

M Müller1, I Lesanovsky, H Weimer

  • 1Institute for Theoretical Physics, University of Innsbruck, A-6020 Innsbruck, Austria.

Physical Review Letters
|June 13, 2009
PubMed
Summary
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We theoretically demonstrate a parallelized C-NOT gate using Rydberg atoms and electromagnetically induced transparency. This enables high-fidelity entanglement of atom ensembles with a single control atom on a microsecond timescale.

Area of Science:

  • Quantum Information Science
  • Atomic Physics
  • Quantum Computing

Background:

  • Entangling multiple atoms with a single control atom is crucial for quantum computing.
  • Rydberg atom interactions and electromagnetically induced transparency (EIT) offer promising pathways for quantum control.

Purpose of the Study:

  • To theoretically demonstrate a parallelized C-NOT gate for entangling mesoscopic atomic ensembles.
  • To achieve high-fidelity, fast quantum state transfer and comparison using Rydberg atom interactions.

Main Methods:

  • Utilizing strong, long-range interactions between Rydberg atoms.
  • Employing electromagnetically induced transparency (EIT) to control atomic state transitions.
  • Developing a theoretical model for a parallelized C-NOT gate and a many-body interferometer.

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Last Updated: Jun 22, 2026

Gradient Echo Quantum Memory in Warm Atomic Vapor
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Published on: November 11, 2013

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Main Results:

  • Demonstration of a parallelized C-NOT gate with high fidelity on a microsecond timescale.
  • Robust conditional transfer of ensemble atoms between logical states based on a control atom's state.
  • Proposal for a many-body interferometer to compare quantum states via control atom measurement.

Conclusions:

  • The proposed scheme offers an efficient method for multi-atom entanglement and quantum state comparison.
  • This theoretical framework advances the development of scalable quantum information processing with neutral atoms.