VANDERBRUGGEN, T.; KOHLHAAS, R.; BERTOLDI, A.; CANTIN, E.; LANDRAGIN, A.; BOUYER, P.

doi:10.1103/PhysRevA.89.063619

Metadatos

Mostrar el registro completo del ítem

Licencia de uso del documento

VANDERBRUGGEN, T.
Institut de Ciencies Fotoniques [Castelldefels] [ICFO]

KOHLHAAS, R.
Laboratoire Charles Fabry / Optique atomique

BERTOLDI, A.
Laboratoire Photonique, Numérique et Nanosciences [LP2N]

Idioma

Article de revue

Este ítem está publicado en

Physical Review A : Atomic, molecular, and optical physics [1990-2015]. 2014-06, vol. 89, n° 6, p. 063619

American Physical Society

Resumen en inglés

We consider the decoherence of a pseudo-spin ensemble under collective random rotations, and study, both theoretically and experimentally, how a nondestructive measurement combined with real-time feedback correction can protect the state against such a decoherence process. We theoretically characterize the feedback efficiency with different parameters --- coherence, entropy, fidelity --- and show that a maximum efficiency is reached in the weak measurement regime, when the projection of the state induced by the measurement is negligible. This article presents in detail the experimental results published in [Phys. Rev. Lett. \textbf{110}, 210503 (2013)], where the feedback scheme stabilizes coherent spin states of trapped ultra-cold atoms, and nondestructively probed with a dispersive optical detection. In addition, we study the influence of several parameters, such as atom number and rotation angle, on the performance of the method. We analyze the various decoherence sources limiting the feedback efficiency and propose how to mitigate their effect. The results demonstrate the potential of the method for the real-time coherent control of atom interferometers.< Leer menos

Metadatos

Compartir este ítem

Licencia de uso del documento

Feedback control of coherent spin states using weak nondestructive measurements

Idioma

Este ítem está publicado en

Resumen en inglés

URI

DOI

Orígen

Centros de investigación