High-speed tomography of time-bin-entangled photons using a single-measurement setting

S. X. Wang; C. Chan; P. Moraw; D. R. Reilly; J. B. Altepeter; Gregory Scott Kanter

doi:10.1103/PhysRevA.86.042122

High-speed tomography of time-bin-entangled photons using a single-measurement setting

S. X. Wang^*, C. Chan, P. Moraw, D. R. Reilly, J. B. Altepeter, Gregory Scott Kanter

^*Corresponding author for this work

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

We generate time-bin entangled photons and measure the resulting quantum state with a tomography system that uses asymmetric interferometers having 3×3 output couplers. This configuration allows for measurements to be made simultaneously in all bases that are required for tomographic reconstruction. By eliminating the burden of tuning interferometer phases and by measuring all the spatial and temporal modes, substantial improvements in measurement speed are observed. Raw fidelities of 84% with respect to an ideal entangled state are measured in about 2 s using a 12-MHz entangled state generator, with corresponding accidental count subtracted fidelities exceeding 90%.

Original language	English (US)
Article number	042122
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	86
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevA.86.042122
State	Published - Oct 25 2012

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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AU - Altepeter, J. B.

AU - Kanter, Gregory Scott

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