Maximizing entanglement in bosonic Josephson junctions using shortcuts to adiabaticity and optimal control. (21st May 2018)

• Record Type: Journal Article
• Authors: Stefanatos, Dionisis; Paspalakis, Emmanuel
• Is Part Of: New journal of physics. Volume 20:Number 5(2018:May)
• Publication Date: 2018-05-21
• Subjects: quantum control -- entanglement -- bosonic Josephson junction -- shortcuts to adiabaticity; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/aac122
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: In this article we consider a bosonic Josephson junction, a model system composed by two coupled nonlinear quantum oscillators which can be implemented in various physical contexts, initially prepared in a product of weakly populated coherent states. We quantify the maximum achievable entanglement between the modes of the junction and then use shortcuts to adiabaticity, a method developed to speed up adiabatic quantum dynamics, as well as numerical optimization, to find time-dependent controls (the nonlinearity and the coupling of the junction) which bring the system to a maximally entangled state.