6533b85dfe1ef96bd12be005
RESEARCH PRODUCT
Cavity-aided quantum parameter estimation in a bosonic double-well Josephson junction
G. M. PalmaG. De ChiaraJ. P. SantosJ. P. SantosMargherita ZuppardoFernando L. SemiãoMauro Paternostrosubject
Josephson effectDe factoAtomic systemPopulationFOS: Physical sciences-01 natural sciencesSettore FIS/03 - Fisica Della Materia010305 fluids & plasmaslaw.inventionsymbols.namesakequant-phlawQuantum mechanics0103 physical sciences:Science::Physics::Atomic physics::Quantum theory [DRNTU]010306 general physicseducationQuantumCondensed Matter::Quantum GasesPhysicsQuantum Physicseducation.field_of_studyCondensed Matter::OtherEstimation theoryAtomic and Molecular Physics and OpticsQuantum Gases (cond-mat.quant-gas)Optical cavitysymbolsCondensed Matter - Quantum GasesQuantum Physics (quant-ph)Hamiltonian (quantum mechanics)cond-mat.quant-gasdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-07-30 | Physical Review A |