Quantum parameter estimation - from fundamentals to applications
DIPC Seminars
- Speaker
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Manuel Gessner, Ecole Normale Superieure, Paris, France
- When
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2021/02/12
13:00 - Place
- Online seminar, Donostia International Physics Center
- Add to calendar
-
iCal
The experimental advances of the last decades have made quantum correlated
states of light and matter available in today's laboratories, but the
efficient characterization of their multipartite entanglement still poses a
great challenge for theory and experiment. Mastering this challenge is a
necessary step towards the large-scale implementation of ideas from quantum
information theory with potential applications in the development of quantum
technologies. Quantum parameter estimation theory, for instance, identifies
strategies to overcome classical precision limits of measurements by
identifying highly sensitive quantum states and measurement observables. This
talk will provide an overview of our recent progress in this field,
highlighting in particular the close connection between metrological
sensitivity and multipartite entanglement. We will see how suitable
observables that capture delicate features of complex quantum states can be
identified under experimental constraints, how entanglement can be detected
with tools from metrology, and how collective quantum enhancements can be
achieved in the simultaneous estimation of multiple parameters. As
applications we will show how this theory can improve the precision of atomic
clocks and the optical resolution of imaging systems.
Host: Geza Giedke
ZOOM: