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Localized single-photon wave functions in free space.

K W Chan1, C K Law, J H Eberly

  • 1Center for Quantum Information and Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA.

Physical Review Letters
|March 23, 2002
PubMed
Summary
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Researchers solved photon localization and single-photon wave functions using entanglement mapping. This method controls photon properties even when the atom is far from the photon.

Area of Science:

  • Quantum optics
  • Atomic physics

Background:

  • Spontaneous emission describes light emission from excited atoms.
  • Photon localization and single-photon wave functions are key quantum phenomena.

Purpose of the Study:

  • To address open problems in photon localization and single-photon wave functions.
  • To develop well-defined wave functions for photons emitted via spontaneous emission.

Main Methods:

  • Utilizing entanglement mapping to control photon properties.
  • Defining wave functions as members of a discrete orthonormal set.

Main Results:

  • Achieved controlled photon localization and defined single-photon wave functions.
  • Demonstrated that entanglement mapping influences localization degree and shape.

Related Experiment Videos

  • Showcased control over photon properties despite atomic remoteness.

    • Conclusions:

    • The study successfully resolved joint open problems in photon localization and wave functions.
    • Entanglement mapping offers a novel method for controlling quantum properties of emitted photons.