Photon Pair Condensation by Engineered Dissipation

Dissipation can usually induce detrimental decoherence in a quantum system. However, engineered dissipation can be used to prepare and stabilize coherent quantum many-body states. Here, we show that, by engineering dissipators containing photon pair operators, one can stabilize an exotic dark state,...

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Bibliographic Details
Published in:Physical review letters 2019-08, Vol.123 (6), p.063602-063602, Article 063602
Main Authors: Cian, Ze-Pei, Zhu, Guanyu, Chu, Su-Kuan, Seif, Alireza, DeGottardi, Wade, Jiang, Liang, Hafezi, Mohammad
Format: Article
Language:English
Subjects:
Circuits
Fluids
Ising model
Long range order
Order parameters
Parity
Photons
Quantum electrodynamics
Quantum theory
Superfluidity
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Summary:Dissipation can usually induce detrimental decoherence in a quantum system. However, engineered dissipation can be used to prepare and stabilize coherent quantum many-body states. Here, we show that, by engineering dissipators containing photon pair operators, one can stabilize an exotic dark state, which is a condensate of photon pairs with a phase-nematic order. In this system, the usual superfluid order parameter, i.e., single-photon correlation, is absent, while the photon pair correlation exhibits long-range order. Although the dark state is not unique due to multiple parity sectors, we devise an additional type of dissipators to stabilize the dark state in a particular parity sector via a diffusive annihilation process which obeys Glauber dynamics in an Ising model. Furthermore, we propose an implementation of these photon pair dissipators in circuit-QED architecture.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.123.063602