Entanglement, Dephasing, and Phase Recovery via Cross-Correlation Measurements of Electrons
arXiv:cond-mat/0607346 · doi:10.1103/PhysRevLett.98.036803
Abstract
Determination of the path taken by a quantum particle leads to a suppression of interference and to a classical behavior. We employ here a quantum 'which path' detector to perform accurate path determination in a two-path-electron-interferometer; leading to full suppression of the interference. Following the dephasing process we recover the interference by measuring the cross-correlation between the interferometer and detector currents. Under our measurement conditions every interfering electron is dephased by approximately a single electron in the detector - leading to mutual entanglement of approximately single pairs of electrons.
13 Pages, 5 Figures
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