Efficient generation of subnatural-linewidth biphotons by controlled quantum interference

Ravikumar Chinnarasu, Chi-Yang Liu, Yi-Feng Ding, Chuan-Yi Lee, Tsung-Hua Hsieh, Ite A. Yu, and Chih-Sung Chuu
Phys. Rev. A 101, 063837 – Published 29 June 2020

Abstract

Biphotons of narrow bandwidth and long temporal length play a crucial role in long-distance quantum communication (LDQC) and linear optical quantum computing (LOQC). However, generation of these photons usually requires atomic ensembles with high optical depth or spontaneous parametric down-conversion with sophisticated optical cavity. By manipulating the two-component biphoton wave function generated from a low-optical-depth (low-OD) atomic ensemble, we demonstrate biphotons with subnatural linewidth in the sub-MHz regime. The potential to shape and manipulate the quantum wave packets of these temporally long photons is also demonstrated and discussed. Our work has potential applications in realizing quantum repeaters and large cluster states for LDQC and LOQC, respectively. The possibility to generate and manipulate subnatural-linewidth biphotons with low OD also opens up the opportunity to miniaturize the biphoton source for implementing quantum technologies on chip-scale quantum devices.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 10 June 2019
  • Accepted 3 June 2020

DOI:https://doi.org/10.1103/PhysRevA.101.063837

©2020 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Ravikumar Chinnarasu*, Chi-Yang Liu, Yi-Feng Ding, Chuan-Yi Lee, Tsung-Hua Hsieh, Ite A. Yu, and Chih-Sung Chuu

  • Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan and Center for Quantum Technology, Hsinchu 30013, Taiwan

  • *ravi@phys.nthu.edu.tw
  • cschuu@phys.nthu.edu.tw

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 101, Iss. 6 — June 2020

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review A

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×