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Proceedings Paper

Quantum state engineering and state tomography using photon-number-resolving measurements (Conference Presentation)
Author(s): Rajveer Nehra; Aye Win; Miller Eaton; Reihaneh Shahrokhshahi; Niranjan Sridhar; Thomas Gerrits; Adriana Lita; Sae Woo Nam; Olivier Pfister

Paper Abstract

Quantum state engineering and state characterization is a key task in quantum information processing in both discrete and continuous variable systems in the optical domain. In particular, quantum states with non-Gaussian (i.e., non-positive) Wigner quasiprobability distribution functions are crucial to universal, fault-tolerant quantum computing with continuous variables. In this talk, we present our recent results on single-photon Fock state tomography using Photon-Number-Resolving (PNR) measurements. We generated a highly pure narrow-band single-photon Fock state by heralding cavity-enhanced spontaneous-parametric-downconversion from a PPKTP optical parametric oscillator. The Wigner function was reconstructed with photon statistics obtained using superconducting transition-edge sensors with an overall system efficiency of 58(2)%. We then discuss quantum state engineering for pure displaced single-photon Fock states, optical cat states, and approximate GKP states using coherent states and single-photon states along with linear optics and PNR measurements. We report our experimental progress for the same.

Paper Details

Date Published: 10 September 2019
Proc. SPIE 11134, Quantum Communications and Quantum Imaging XVII, 111340G (10 September 2019);
Show Author Affiliations
Rajveer Nehra, Univ. of Virginia (United States)
Aye Win, The Univ. of Oklahoma (United States)
Miller Eaton, Univ. of Virginia (United States)
Reihaneh Shahrokhshahi, Xanadu (Canada)
Niranjan Sridhar, Univ. of Virginia (United States)
Thomas Gerrits, National Institute of Standards and Technology (United States)
Adriana Lita, National Institute of Standards and Technology (United States)
Sae Woo Nam, National Institute of Standards and Technology (United States)
Olivier Pfister, Univ. of Virginia (United States)

Published in SPIE Proceedings Vol. 11134:
Quantum Communications and Quantum Imaging XVII
Keith S. Deacon, Editor(s)

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