Nonlinear Quantum Light Generation in Collective Spontaneous Emission

Area of Science:

• Quantum optics
• Quantum information science

Background:

• Collective spontaneous emission involves multiple quantum emitters decaying into shared radiation modes, influencing emission rates.
• Quantum correlations between emitters can be lost or preserved during emission into common modes.

Purpose of the Study:

• To investigate the conditions under which quantum correlations are transferred from emitters to emitted light.
• To explore the creation of specific photonic states for quantum computation and error correction using collective emission.

Main Methods:

• Analyzing the multimode nature of collective spontaneous emission.
• Incorporating factors like emitter positions, losses, interactions, and non-Markovian dynamics.
• Studying systems including cavity QED, waveguide QED, and atomic arrays.

Main Results:

• Identified conditions for preserving quantum correlations during collective emission.
• Demonstrated the transfer of quantum correlations to the output light.
• Showcased the generation of tailored photonic states (e.g., Gottesman-Kitaev-Preskill, Schrödinger-cat states).

Conclusions:

• Collective spontaneous emission can be harnessed to generate valuable quantum light states.
• Findings provide pathways for creating multiphoton quantum light for bosonic codes.
• Applications include continuous-variable quantum computation, communication, and sensing.