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

M. Zuppardo, J. P. Santos, G. De Chiara, M. Paternostro, F. L. Semiao, G. M. Palma

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)
277 Downloads (Pure)


We describe an apparatus designed to make non-demolition measurements on a Bose-Einstein condensate (BEC) 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 {\it de facto} Hamiltonian diagnosis via a highly controllable quantum probe.
Original languageEnglish
Article number033631
Number of pages9
JournalPhysical Review A (Atomic, Molecular, and Optical Physics)
Issue number3
Publication statusPublished - 26 Mar 2015


  • quant-ph
  • cond-mat.quant-gas


Dive into the research topics of 'Cavity-aided quantum parameter estimation in a bosonic double-well Josephson junction'. Together they form a unique fingerprint.

Cite this