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Photon Pair Condensation by Engineered Dissipation
Ze-Pei Cian1,2, Guanyu Zhu2, Su-Kuan Chu1,2,3
1Department of Physics, University of Maryland, College Park, Maryland 20742, USA.
Physical Review Letters
|September 7, 2019
Summary
Engineered dissipation stabilizes exotic quantum states. Researchers used photon pair operators to create a dark state, a photon pair condensate with unique phase-nematic order, observed via photon pair correlations.
Area of Science:
- Quantum optics
- Condensed matter physics
- Quantum information science
Background:
- Dissipation typically causes decoherence in quantum systems.
- Engineered dissipation offers a route to prepare and stabilize coherent quantum many-body states.
Purpose of the Study:
- To demonstrate the stabilization of an exotic dark state using engineered dissipation.
- To achieve a photon pair condensate with phase-nematic order.
Main Methods:
- Utilizing dissipators with photon pair operators.
- Engineering additional dissipators for parity sector selection via diffusive annihilation.
- Proposing implementation in circuit-Quantum Electrodynamics (circuit-QED) architecture.
Main Results:
- Stabilization of a dark state, a condensate of photon pairs.
- Observation of phase-nematic order in the dark state.
- Absence of single-photon superfluid order, replaced by long-range photon pair correlation.
- Successful stabilization in a specific parity sector.
Conclusions:
- Engineered dissipation can create novel quantum states beyond conventional orders.
- Photon pair condensates with phase-nematic order are achievable.
- Circuit-QED provides a viable platform for realizing these engineered quantum states.
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