Creation of entangled atomic states by an analogue of the Dynamical Casimir effect. (12th October 2018)

• Record Type: Journal Article
• Authors: Lange, K; Peise, J; Lücke, B; Gruber, T; Sala, A; Polls, A; Ertmer, W; Juliá-Díaz, B; Santos, L; Klempt, C
• Is Part Of: New journal of physics. Volume 20:Number 10(2018:Oct.)
• Publication Date: 2018-10-12
• Subjects: entanglement -- Dynamical Casimir effect -- spin dynamics -- Bose–Einstein condensate; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/aae116
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: If the boundary conditions of the quantum vacuum are changed in time, quantum field theory predicts that real, observable particles can be created in the initially empty modes. Here, we realize this effect by changing the boundary conditions of a spinor Bose–Einstein condensate, which yields a population of initially unoccupied spatial and spin excitations. We prove that the excitations are created as entangled pairs by certifying continuous-variable entanglement within the many-particle output state.