Title | Photon Pair Condensation by Engineered Dissipation |
Publication Type | Journal Article |
Year of Publication | 2019 |
Authors | Z-P. Cian, G. Zhu, S-K. Chu, A. Seif, W. DeGottardi, L. Jiang, and M. Hafezi |
Journal | Phys. Rev. Lett. |
Volume | 123 |
Pagination | 063602 |
Date Published | AUG 6 |
Type of Article | Article |
ISSN | 0031-9007 |
Abstract | 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. |
DOI | 10.1103/PhysRevLett.123.063602 |