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|Author(s):||Sacha Kocsis; Boris Braverman; Sylvain Ravets; Martin J. Stevens; Richard P. Mirin; L. Krister Shalm; Aephraim M. Steinberg;|
|Title:||Observing the average trajectories of single photons in a two-slit interferometer|
|Published:||June 03, 2011|
|Abstract:||A consequence of the quantum mechanical uncertainty principle is that one may not discuss the path or "trajectory" that a quantum particle takes, because any measurement of position irrevocably disturbs the momentum, and vice versa. Using weak measurements, however, it is possible to operationally define a set of trajectories for an ensemble of quantum particles. We sent single photons emitted by a quantum dot through a double-slit interferometer and reconstructed these trajectories by performing a weak measurement of the photon momentum, postselected according to the result of a strong measurement of photon position in a series of planes. The results provide an observationally grounded description of the propagation of subensembles of quantum particles in a two-slit interferometer.|
|Pages:||pp. 1170 - 1173|
|Keywords:||Quantum Optics, Single-Photon Sources, Weak Measurements|
|Research Areas:||Quantum Optics|
|DOI:||http://dx.doi.org/10.1126/science.1202218 (Note: May link to a non-U.S. Government webpage)|
|PDF version:||Click here to retrieve PDF version of paper (777KB)|