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Related Experiment Video

Updated: Jul 8, 2026

Implementation of a Reference Interferometer for Nanodetection

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Memory-Assisted Nonlocal Interferometer toward Long-Baseline Telescopes.

Bin Wang^1,2,3, Xi-Yu Luo^1,2,3, Bo-Feng Gao⁴

¹University of Science and Technology of China, Hefei National Research Center for Physical Sciences at the Microscale and School of Physical Sciences, Hefei 230026, China.

Physical Review Letters

|July 7, 2026

Summary

Researchers demonstrated a nonlocal interferometer using quantum entanglement and memory, extending its fiber-link baseline to 20 km. This advance enhances angular resolution for quantum imaging and has potential applications in astronomy.

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Area of Science:

Quantum communication
Quantum optics
Interferometry

Background:

Quantum networks and remote quantum entanglement are crucial for future quantum communication.
Extending optical interferometer baselines is key to improving angular resolution in interferometric imaging.

Purpose of the Study:

To demonstrate a memory-assisted nonlocal interferometer.
To achieve a long fiber-link baseline for enhanced interferometric imaging.

Main Methods:

Utilized a simulated thermal light field for measurement.
Employed a memory-assisted nonlocal interferometer setup.
Achieved a 20 km fiber-link baseline.

Main Results:

Demonstrated a 20 km fiber-link baseline for the nonlocal interferometer.
Showcased compensation for a geometric delay of 1.5 km.
Successfully measured a simulated thermal light field.

Conclusions:

The study shows potential for enhancing angular resolution in optical interferometric imaging using delocalized single-photon entanglement.
This work paves the way for using quantum memories in astronomical observations.