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

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Photon-Mediated Localization in Two-Level Qubit Arrays.

Janet Zhong¹, Nikita A Olekhno², Yongguan Ke^1,3

¹Nonlinear Physics Centre, Research School of Physics, Australian National University, Canberra ACT 2601, Australia.

Physical Review Letters

|March 24, 2020

Summary

This summary is machine-generated.

We predict a new quantum phenomenon where qubits create a self-trapping effect, similar to an optical lattice for photons. This interaction-induced spatial localization arises from photon blockade and waveguide coupling.

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Area of Science:

Quantum optics
Condensed matter physics
Quantum information science

Background:

Waveguide-Qubit interactions are crucial for quantum technologies.
Photon blockade is a key nonlinear optical effect.
Spatial localization phenomena are fundamental in wave physics.

Purpose of the Study:

To predict a novel interaction-induced spatial localization in a periodic array of qubits coupled to a waveguide.
To describe this phenomenon as a quantum analogue of a self-induced optical lattice.

Main Methods:

Theoretical prediction of a novel quantum phenomenon.
Analysis of qubit-waveguide interactions.
Investigating the role of photon blockade and long-range coupling.

Main Results:

Predicted existence of interaction-induced spatial localization in a qubit-waveguide system.
Demonstrated analogy to self-induced optical lattices formed by photons.
Identified interplay between on-site repulsion (photon blockade) and waveguide-mediated coupling as the cause.

Conclusions:

The study predicts a new quantum localization mechanism in qubit arrays.
This phenomenon offers potential for novel quantum optical and information processing applications.
Understanding these interactions is key for advancing quantum device design.