Quantum fluctuations and stability of vortex lattices in a nonresonantly pumped exciton–polariton condensate. (6th January 2017)

• Record Type: Journal Article
• Authors: Chen, Ting-Wei; Jheng, Shih-Da; Jiang, T F; Cheng, Szu-Cheng
• Is Part Of: Journal of physics. Volume 29:Number 8(2017)
• Publication Date: 2017-01-06
• Subjects: vortex lattice -- condensate -- exciton–polariton; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aa51b4
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: The dynamics of an exciton–polariton condensate (EPC) subject to harmonic confinement can cause spontaneously formed vortices to arrange into a triangular vortex lattice. The stability of such a spontaneously formed vortex lattice is still unknown. We investigate the quantum fluctuations of vortex lattices in a rapidly rotating EPC with a rotation frequency close to the harmonic trap. In such a large condensate, we find that a vortex lattice with a triangular structure is stable, whereas one with a square structure becomes unstable. This result indicates that a driven-dissipative vortex array with strong quantum fluctuations can occur in an EPC.