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Related Concept Videos

The Quantum-Mechanical Model of an Atom02:45

The Quantum-Mechanical Model of an Atom

Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra. Schrödinger...
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Related Experiment Video

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Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

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Published on: June 8, 2018

Mapping multiple photonic qubits into and out of one solid-state atomic ensemble.

Imam Usmani1, Mikael Afzelius, Hugues de Riedmatten

  • 1Group of Applied Physics, University of Geneva, CH-1211 Geneva 4, Switzerland.

Nature Communications
|October 27, 2010
PubMed
Summary
This summary is machine-generated.

Researchers demonstrate storing 64 photonic qubits in a single quantum memory using rare-earth ions. This breakthrough advances scalable quantum networks and quantum communication by enabling efficient multi-qubit storage.

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Area of Science:

  • Quantum Communication
  • Quantum Information Science
  • Solid-State Physics

Background:

  • Scalable quantum networks are essential for the future of quantum communication.
  • Efficient storage of multiple qubits in a single quantum memory is a key requirement for realistic quantum networks.
  • Coherent and reversible mapping of photonic qubits onto atomic systems (quantum memories) is crucial for this.

Purpose of the Study:

  • To demonstrate a method for storing multiple photonic qubits in a single solid-state quantum memory.
  • To achieve coherent and reversible mapping of optical modes onto an atomic system.
  • To advance the development of scalable quantum networks.

Main Methods:

  • Utilized a high-bandwidth (100 MHz) atomic frequency comb in a solid-state ensemble of rare-earth ions.
  • Employed time-domain multiplexing to map 64 optical modes at the single-photon level onto the quantum memory.
  • Encoded multiple qubits in short temporal modes (time-bin qubits) with a storage time of over 1 μs.

Main Results:

  • Successfully demonstrated coherent and reversible mapping of 64 optical modes at the single-photon level.
  • Achieved efficient storage of multiple time-bin qubits within a single quantum memory.
  • Verified the good coherence of the mapping process through simultaneous storage and analysis of multiple qubits.

Conclusions:

  • This work presents a significant step towards scalable quantum networks by enabling efficient multi-qubit storage in a single quantum memory.
  • The developed light-matter interface based on rare-earth ions offers a promising platform for future quantum communication technologies.
  • The ability to store multiple qubits enhances the feasibility of complex quantum information processing and networking.