Work

Cavity-aided quantum parameter estimation in a bosonic double-well Josephson junction

Year: 2015

Type: article

Abstract: We describe an apparatus designed to make nondemolition measurements on a Bose-Einstein condensate trapped in a double-well optical cavity. This apparatus contains, as well as the bosonic gas and the trap, an optical cavity. We show how the interaction between the light and the atoms, under appropriate conditions, can allow for a weakly disturbing yet highly precise measurement of the population imbalance between the two wells and its variance. We show that the setting is well suited for the implementation of quantum-limited estimation strategies for the inference of the key parameters defining the evolution of the atomic system and based on measurements performed on the cavity field. This would enable de facto Hamiltonian diagnosis via a highly controllable quantum probe.

Source: Physical Review A

DOI: 10.1103/physreva.91.033631

Authors: M. Zuppardo, J. P. Santos, G. De Chiara, M. Paternostro, F. L. Semião, G. M. Palma

Institutions: Nanyang Technological University, Queen's University Belfast, Universidade Federal do ABC, University of Palermo

Language: English

Topic: Cold Atom Physics and Bose-Einstein Condensates

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green