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How Single-Photon Switching Is Quenched with Multiple Λ-Level Atoms.

Alexander N Poddubny¹, Serge Rosenblum², Barak Dayan^3,4

¹Department of Physics of Complex Systems, <a href="https://ror.org/0316ej306">Weizmann Institute of Science</a>, Rehovot 7610001, Israel.

Physical Review Letters

|September 27, 2024

Summary

This summary is machine-generated.

Single-photon switching in ensembles of quantum emitters with a Λ-level scheme is theoretically analyzed. The study reveals that switching efficiency diminishes with more emitters due to the quantum Zeno effect.

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Area of Science:

Quantum optics
Atomic physics
Nonlinear optics

Background:

Single-photon nonlinearity is crucial for quantum technologies.
Deterministic quantum operations require complex emitter structures.
Understanding emitter ensembles is key for scalable quantum systems.

Purpose of the Study:

To theoretically investigate single-photon switching in ensembles of emitters with a Λ-level scheme.
To analyze the impact of emitter number on switching efficiency.
To identify the underlying mechanism responsible for the observed behavior.

Main Methods:

Theoretical modeling of quantum emitters with a Λ-level scheme.
Analysis of single-photon interaction dynamics within an ensemble.
Investigation of the quantum Zeno effect's role in photon-controlled dynamics.

Main Results:

Single-photon switching efficiency in Λ-level emitter ensembles decreases with an increasing number of emitters.
The switching efficiency vanishes as the ensemble size grows.
The quantum Zeno effect is identified as the mechanism limiting switching efficiency.

Conclusions:

Deterministic single-photon switching in ensembles is challenging with Λ-level schemes.
The quantum Zeno effect hinders efficient photon-controlled dynamics in these systems.
Further research is needed for scalable deterministic quantum operations.