Tomographic reconstruction of time-bin-entangled qudits

Samantha J. Nowierski, Neal N. Oza, Prem Kumar, and Gregory S. Kanter
Phys. Rev. A 94, 042328 – Published 19 October 2016

Abstract

We describe an experimental implementation to generate and measure high-dimensional time-bin-entangled qudits. Two-photon time-bin entanglement is generated via spontaneous four-wave mixing in single-mode fiber. Unbalanced Mach-Zehnder interferometers transform selected time bins to polarization entanglement, allowing standard polarization-projective measurements to be used for complete quantum state tomographic reconstruction. Here we generate maximally entangled qubits (d=2), qutrits (d=3), and ququarts (d=4), as well as other phase-modulated nonmaximally entangled qubits and qutrits. We reconstruct and verify all generated states using maximum-likelihood estimation tomography.

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  • Received 12 August 2016

DOI:https://doi.org/10.1103/PhysRevA.94.042328

©2016 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & Technology

Authors & Affiliations

Samantha J. Nowierski1,2, Neal N. Oza1, Prem Kumar1,3, and Gregory S. Kanter1

  • 1Center for Photonic Communication and Computing, EECS Department, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3118, USA
  • 2Graduate Program in Applied Physics, Northwestern University, Evanston, Illinois 60208, USA
  • 3Department of Physics and Astronomy, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3112, USA

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Issue

Vol. 94, Iss. 4 — October 2016

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