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Remote temporal wavepacket narrowing

Karolina Sedziak-Kacprowicz¹, Mikołaj Lasota¹, Piotr Kolenderski²

¹Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100, Toruń, Poland.

Scientific Reports

|March 1, 2019

Summary

We experimentally narrowed the temporal wavepackets of single photons for quantum communication. This technique optimizes photon sources to improve the performance of quantum communication protocols.

Area of Science:

Quantum optics
Quantum communication

Background:

Quantum communication protocols rely on precisely prepared photons.
Wavepacket characteristics significantly impact protocol efficiency.

Purpose of the Study:

To experimentally demonstrate remote temporal wavepacket narrowing of heralded single photons.
To identify optimal photon source characteristics for minimizing wavepacket width.

Main Methods:

Utilizing spontaneous parametric down-conversion to generate heralded single photons.
Employing time-resolved measurements on frequency-entangled heralding photons.
Investigating photon pair source parameters.

Main Results:

Successful experimental demonstration of remote temporal wavepacket narrowing.
Identification of key source parameters influencing wavepacket width.
Quantification of the narrowing effect.

Conclusions:

Remote temporal wavepacket narrowing is achievable and beneficial for quantum communication.
Optimizing photon pair sources can enhance heralded single-photon quality.
This technique offers a pathway to improved quantum communication systems.

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