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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

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Two-Level Quantum Systems in Two-Dimensional Materials for Single Photon Emission.

Sunny Gupta¹, Ji-Hui Yang¹, Boris I Yakobson¹

¹Department of Materials Science and Nanoengineering, Department of Chemistry, and the Smalley Institute , Rice University , Houston , Texas 77005 , United States.

|December 12, 2018

Summary

This summary is machine-generated.

Researchers propose a new strategy for creating ideal single photon emission (SPE) sources using two-dimensional materials. This advance is crucial for developing quantum computing technologies.

Keywords:

Photonic qubits ab initio boron nitride color centers diamane paramagnetic defects transition metal dichalcogenides

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Area of Science:

Quantum physics
Materials science
Solid-state physics

Background:

Single photon emission (SPE) is vital for quantum technologies and typically relies on point defects in solid-state materials.
Two-dimensional materials offer unique properties like surface openness, optical transparency, and quantum confinement beneficial for SPE.

Purpose of the Study:

To propose a strategy for designing ideal single photon emitters in two-dimensional materials.
To identify defect complexes that meet the stringent requirements for efficient and controllable SPE.

Main Methods:

Utilizing first-principles calculations to investigate defect properties.
Employing point-group symmetry analysis to guide defect design.
Assessing thermodynamic stability and experimental feasibility.

Main Results:

A strategy for designing paramagnetic defect complexes with reduced symmetry was proposed.
These defects exhibit electronic states isolated from the host, belong to a majority spin eigenstate, and are excitable by polarized light.
The Re_MoV_S defect in MoS₂ is identified as a practical candidate for SPE.

Conclusions:

Novel two-dimensional materials provide an advantageous platform for realizing efficient single photon emitters.
Designed paramagnetic defect complexes can fulfill the requirements for ideal SPE, essential for quantum computing.
The proposed strategy and identified Re_MoV_S defect offer a promising pathway for experimental SPE sources.