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Distributed g(2) Retrieval with Atomic Clocks: Eliminating Conventional Sync Protocols

Md Mehdi Hassan, Jacob E. Humberd, Mohmad Junaid Ul Haq, Noah A. Crum, George Siopsis, Tian Li

Abstract

We demonstrate a method to measure coincidences between polarization-entangled photons distributed to distant locations, eliminating traditional synchronization by employing a compact, chip-scale atomic clock for precise timing.

Distributed g(2) Retrieval with Atomic Clocks: Eliminating Conventional Sync Protocols

Abstract

We demonstrate a method to measure coincidences between polarization-entangled photons distributed to distant locations, eliminating traditional synchronization by employing a compact, chip-scale atomic clock for precise timing.
Paper Structure (1 section, 2 figures)

This paper contains 1 section, 2 figures.

Table of Contents

  1. Acknowledgments

Figures (2)

  • Figure 1: Experimental setup. (a) Analysis of frequency drift when one atomic clock (right) is digitally tuned and disciplined with respect to the other (left). (b) The main setup, where a polarizing beam splitter (PBS) splits the correlated photons. The heralding photon is detected locally by a single-photon detector (SNSPD 1) connected to a MultiHarp 150 time tagger (MH1), disciplined by atomic clock AC1. The signal photon travels through a 10 km fiber spool before reaching SNSPD 2 and is then time-tagged via MH2, disciplined by AC2.
  • Figure 2: $g^{(2)}$ correlation analysis: (a) Both SNSPDs are connected to a single MultiHarp 150 time-tagger; (b) the SNSPDs are connected to separate, distant MultiHarps, disciplined by a White Rabbit switch; (c) the SNSPDs are connected to separate, distant MultiHarps, each disciplined by Rb oscillators; (d) linear drift statistics of the relative frequency.