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Multielectron Ground State Electroluminescence.

Mauro Cirio^1,2, Nathan Shammah², Neill Lambert²

¹Graduate School of China Academy of Engineering Physics, Beijing 100193, China.

Physical Review Letters

|May 31, 2019

Summary

This summary is machine-generated.

Ground state electroluminescence in cavity-electron systems is possible even without exciting electrons. This effect, driven by nonequilibrium current, is robust in many-electron systems and observable in diverse physical setups.

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Area of Science:

Quantum optics
Condensed matter physics

Background:

Cavity-electron systems in the ultrastrong coupling regime exhibit virtual photons in their ground state.
Nonequilibrium effects from electric currents can modulate light-matter coupling.

Purpose of the Study:

To investigate ground state electroluminescence in many-electron systems.
To demonstrate the robustness and broad applicability of this phenomenon.

Main Methods:

Theoretical analysis beyond the rotating wave approximation.
Modeling of cavity-electron interactions in the ultrastrong coupling regime.

Main Results:

Ground state electroluminescence can arise in many-electron systems, extending previous single-qubit findings.
Collective enhancement of light-matter coupling ensures robustness in the thermodynamic limit.
The effect is observable in systems like semiconductor heterostructures and Dicke model implementations.

Conclusions:

Ground state electroluminescence is a viable phenomenon in various many-electron quantum systems.
This effect offers a new pathway for generating extracavity photons without direct electron excitation.