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Dipole blockade and quantum information processing in mesoscopic atomic ensembles.

M D Lukin1, M Fleischhauer, R Cote

  • 1ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA.

Physical Review Letters
|July 20, 2001
PubMed
Summary
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We developed a quantum information manipulation technique using optical excitation and dipole blockade in mesoscopic ensembles. This method enables controlled generation of atomic spin and photonic states for scalable quantum logic gates.

Area of Science:

  • Quantum information science
  • Atomic physics
  • Optics

Background:

  • Collective states in mesoscopic ensembles are crucial for quantum information processing.
  • Optical excitation is a common method for manipulating quantum states.

Purpose of the Study:

  • To present a novel technique for manipulating quantum information in collective states.
  • To utilize optical excitation and dipole blockade for controlled quantum operations.

Main Methods:

  • Employing optical excitation to access collective states with strong dipole-dipole interactions.
  • Leveraging the "dipole blockade" phenomenon to inhibit transitions into multiply excited states.
  • Analyzing a cold Rydberg gas system as a practical example.

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Main Results:

  • Demonstrated controlled generation of collective atomic spin states.
  • Showcased the creation of nonclassical photonic states.
  • Established a pathway for scalable quantum logic gates.

Conclusions:

  • The described technique offers a robust method for quantum information manipulation.
  • Dipole blockade in mesoscopic ensembles is a powerful tool for quantum computation.
  • This approach facilitates the development of scalable quantum technologies.