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Generation and Coherent Control of Pulsed Quantum Frequency Combs

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Phase-Controlled Tunable Unconventional Photon Blockade in a Single-Atom-Cavity System.

Hong Li^1,2, Ming Liu², Feng Yang²

¹State Key Laboratory on Integrated Optoelectronics and College of Electronic Science and Engineering, Jilin University, Changchun 130012, China.

|November 25, 2023

Summary

We demonstrate tunable unconventional photon blockade in a single-atom-cavity system using squeezed light and phase control. Quantum interference enables photon blockade, crucial for developing advanced quantum information technologies.

Keywords:

phase photon blockade second-order correlation function single-atom-cavity system

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Area of Science:

Quantum optics
Cavity optomechanics
Quantum information science

Background:

Cavity optomechanical systems are vital for quantum information processing, high-precision measurement, and ultrasensitive sensors.
Photon blockade is essential for creating single-photon sources, a key component in quantum technologies.
Nonlinear coupling in optical systems leads to the photon blockade effect.

Purpose of the Study:

To investigate phase-controlled tunable unconventional photon blockade in a single-atom-cavity system.
To explore the influence of squeezed light and tunable phase on photon blockade.
To analyze the role of second-order nonlinear crystals in the cavity.

Main Methods:

Utilizing a single-atom-cavity system interacting with squeezed light.
Employing a complex pulsed laser with phase-controlled coherent driving.
Analyzing the photon blockade effect using the second-order correlation function.
Comparing numerical and analytical results for validation.

Main Results:

Quantum interference between three transition pathways induces photon blockade.
Photon blockade persists even without squeezed light, with two interference pathways.
Tunable phase and second-order nonlinear strength significantly influence the photon blockade effect.
Good agreement between numerical and analytical results was observed.

Conclusions:

The study successfully demonstrates tunable unconventional photon blockade in a sophisticated quantum system.
Quantum interference is identified as the primary mechanism behind the observed photon blockade.
The findings offer a pathway for developing controllable single-photon sources for quantum applications.