Seeing a single photon without destroying it
Article Abstract:
A single-photon-quantum non-demolition (QND) measurement was achieved, satisfying the criteria of non-demolition and repeatability. An analysis of the interferometer imperfections was applied to the detection of an unknown field having no more than one photon. It is inferred that following a single meter reading, the corresponding photon number probability rises to 0.84. The single-photon QND (SP-QND) method amounts to the operation of a quantum gate where the photon and the atom have roles of control and target qubits.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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Origin of quantum-mechanical complementarity probed by a 'which-way' experiment in an atom interferometer
Article Abstract:
The complementarity principle relates to ability of quantum-mechanical bodies to behaves as particles or waves in different experimental conditions. The use of a 'which-way detector to determine the path of a particle, destroys the interference pattern. A which-way experiment in an atom interferometer is reported, whereby the back action of path detection is too small to explain interference pattern disappearance. Correlations are made between the which-way detector and atomic motion.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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A complementary experiment with an interferometer at the quantum - classical boundary
Article Abstract:
Research illustrating the principle of complementarity in quantum mechanics is presented. The use of an interferometer with the capability of tuning from macroscopic to microscopic element beam-splitting is emphasized. An illustration of the quantum to the classical boundary is examined.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2001
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