Data di Pubblicazione:
2023
Citazione:
Fundamental limits of pulsed quantum light spectroscopy: Dipole moment estimation / F. Albarelli, E. Bisketzi, A. Khan, A. Datta. - In: PHYSICAL REVIEW A. - ISSN 2469-9926. - 107:6(2023), pp. 1-27. [10.1103/PhysRevA.107.062601]
Abstract:
We study the fundamental limits of the precision of estimating parameters of a quantum matter
system when it is probed by a travelling pulse of quantum light. In particular, we focus on the
estimation of the interaction strength between the pulse and a two-level atom, equivalent to the
estimation of the dipole moment. Our analysis of single-photon pulses highlights the interplay between
the information gained from the absorption of the photon by the atom as measured in absorption
spectroscopy, and the perturbation to the temporal mode of the photon due to spontaneous emission.
Beyond the single-photon regime, we introduce an approximate model to study more general states of
light in the limit of short pulses, where spontaneous emission can be neglected. We also show that for
a vast class of entangled biphoton states, quantum entanglement between the signal mode interacting
with the atom and the idler mode provides no fundamental advantage and the same precision can
be obtained with a separable state. We conclude by studying the estimation of the electric dipole
moment of a sodium atom using quantum light. Our work initiates a quantum information theoretic
methodology for developing the theory and practice of quantum light spectroscopy.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
F. Albarelli, E. Bisketzi, A. Khan, A. Datta
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