Volume 77, Number 2, January 2007
|Number of page(s)||5|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||17 January 2007|
Demonstration of controllable temporal distinguishability in a three-photon state
Key Laboratory of Quantum Information, University of Science and Technology of China, CAS - Hefei 230026, PRC
2 Department of Physics, Indiana University-Purdue University Indianapolis - 402 N. Blackford Street, Indianapolis, IN 46202, USA
Corresponding author: firstname.lastname@example.org
Accepted: 23 November 2006
By using two processes of parametric down-conversion, we are able to generate three photons with controllable degree of temporal distinguishability. This is confirmed by the visibility in a three-photon interference experiment, which can be generalized to provide a practical technique for characterizing the temporal distinguishability of a multi-photon state. This method of quantitative description of multi-photon indistinguishability will have practical implications in the implementation of quantum information protocols.
PACS: 42.50.Dv – Nonclassical states of the electromagnetic field, including entangled photon states; quantum state engineering and measurements / 03.67.Mn – Entanglement production, characterization, and manipulation / 42.50.St – Nonclassical interferometry, subwavelength lithography
© Europhysics Letters Association, 2007
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