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Updated: Sep 19, 2025
07:56
A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
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Deterministic Generation of Photonic Entangled States Using Decoherence-Free Subspaces
Oriol Rubies-Bigorda1,2, Stuart J Masson3, Susanne F Yelin2
1Massachusetts Institute of Technology, Physics Department, Cambridge, Massachusetts 02139, USA.
Physical Review Letters
|June 18, 2025
Summary
Collective states of matter enable deterministic generation of quantum light states using a minimal three-emitter model. This approach facilitates quantum information technologies by creating entangled photonic states through controlled light-matter interactions.
Area of Science:
- Quantum optics
- Quantum information science
- Condensed matter physics
Background:
- Quantum states of light are crucial for quantum information technologies.
- Deterministic generation of these states is a significant challenge.
- Collective phenomena in matter offer potential resources for quantum control.
Purpose of the Study:
- To propose and model a system for the deterministic generation of quantum states of light.
- To utilize collective states of matter as a resource for quantum information processing.
- To demonstrate the generation of specific entangled photonic states.
Main Methods:
- A minimal model of three emitters coupled to a terminated one-dimensional waveguide (half-waveguide).
- Exploiting photon-mediated interactions to create bright and dark states.
- Utilizing local driving and frequency control for quantum gates within a decoherence-free subspace.
- Coupling emitters to bright states for photon emission and light-matter gates.
Main Results:
- Emergence of bright and dark states from emitter interactions.
- Dark states form a decoherence-free subspace, preventing dissipation.
- Arbitrary quantum gates are achievable within the decoherence-free subspace.
- Demonstration of generating entangled photonic states (GHZ, cluster states) via sequential gates.
Conclusions:
- Collective states of matter provide a robust platform for deterministic quantum light generation.
- The proposed system enables high-fidelity quantum gates and the creation of complex entangled states.
- This work advances the development of quantum information technologies through novel light-matter interfaces.
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