soleil

Soutenance de thèse/ Séminaires/ HDR


Soutenance de HDR

Pas de soutenance a annoncer actuellement.

Séminaire

Ivan Deutsch, de l’université d’Albuquerque (New Mexico, USA)  donnera un séminaire le 06 juillet  juin 2018 à 11:00 heure à l’IOGS dans l’auditorium.

Le titre du séminaire:  » Quantum Control with Rydberg-Dressed Atoms »

Abstract:  The strong dipole-dipole interactions arising when atoms are excited to high-lying Rydberg states is a powerful method for designing entangling interactions in neutral atoms.  I will explore how adiabatic dressing of ground-state atoms with Rydberg states provides an avenue for further manipulation of nonclassical states based on the techniques of optimal control.  By mapping a symmetrically-coupled Rydberg ensemble to the Jaynes-Cummings model, I will show how we can obtain arbitrary control of superpositions of collective Dicke states.  Moreover, adiabatic dressing and quantum control can allow us to create high-fidelity entangling two-qubit gates, robust to random atomic motion at finite temperature, and other imperfections.

 

**********************************************************************************

Jean-Philippe MacLean, de l’Institute for Quantum Computing (IQC) donnera un séminaire le 20 juillet 2018 à 15:00 heure à ParisTech, 46 rue Barrault à Paris dans la salle B316.

Le titre du séminaire:  » Direct characterization of ultrafast energy-time entangled photon pairs »

Abstract:

In the famous example suggested by Einstein, Podolsky and Rosen (EPR), two particles can be highly correlated in position and momentum. For photons, strong EPR-like correlations can also occur in the energy-time degree of freedom, that is, between the frequency and the time of arrival of the photons. This type of entanglement enables fundamentally quantum effects such as dispersion cancellation and clock synchronization.  However, detection of this entanglement and observation of these effects can require ultrafast time resolution beyond the capabilities of current photon detectors. Thus, for operations on ultrafast timescales, more powerful and complex methods are required.