High-Dimensional Frequency-Encoded Quantum Information Processing with Passive Photonics and Time-Resolving Detection

Chaohan Cui, Kaushik P. Seshadreesan, Saikat Guha, Linran Fan

Research output: Contribution to journalArticle

Abstract

In this Letter, we propose a new approach to process high-dimensional quantum information encoded in a photon frequency domain. In contrast to previous approaches based on nonlinear optical processes, no active control of photon energy is required. Arbitrary unitary transformation and projection measurement can be realized with passive photonic circuits and time-resolving detection. A systematic circuit design for a quantum frequency comb with arbitrary size has been given. The criteria to verify quantum frequency correlation has been derived. By considering the practical condition of the detector's finite response time, we show that high-fidelity operation can be readily realized with current device performance. This work will pave the way towards scalable and high-fidelity quantum information processing based on high-dimensional frequency encoding.

Original languageEnglish (US)
Article number190502
JournalPhysical review letters
Volume124
Issue number19
DOIs
StatePublished - May 15 2020

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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