H2020

Talk by Antoine Browaeys: “Experimental many-body physics using arrays of individual Rydberg atoms”

Gordon Conference in Atomic Physics, Salve Regina University, Newport RI (USA), june 11-16, 2017

Talk by Antoine Browaeys: “Experimental many-body physics using arrays of individual Rydberg atoms”

Workshop “Quantum light-matter interactions in low dimensions”, ICFO, Castelldefels (Spain), May 4-7, 2017

Talk by Antoine Browaey: “Experimental many-body physics using arrays of individual Rydberg atoms”

Workshop “From few to many: exploring quantum systems one atom at a time”, Obergurgl (Austria), April 10-13, 2017

Optical Control of the Resonant Dipole-Dipole Interaction between Rydberg Atoms

Date: 
2017-08-02
Author(s): 

Sylvain de Léséleuc, Daniel Barredo, Vincent Lienhard, Antoine Browaeys, & Thierry Lahaye

Reference: 

Phys. Rev. Lett. 119, 053202 (2017)

We report on the local control of the transition frequency of a spin 1/

Quantum Spin Lenses in Atomic Arrays

Date: 
2017-09-20
Author(s): 

A. Glätzle, K. Ender, D. S. Wild, S. Choi, H. Pichler, M. Lukin, P. Zoller

Reference: 

Phys. Rev. X 7, 31049 (2017)

We propose and discuss quantum spin lenses, where quantum states of delocalized spin excitations in an atomic medium are focused in space in a coherent quantum process down to (essentially) single atoms. These can be employed to create controlled interactions in a quantum light-matter interface, where photonic qubits stored in an atomic ensemble are mapped to a quantum register represented by single atoms. We propose Hamiltonians for quantum spin lenses as inhomogeneous spin models on lattices, which can be realized with Rydberg atoms in 1D, 2D, and 3D, and with strings of trapped ions.

Anisotropic polarizability of erbium atoms

Date: 
2018-01-19
Author(s): 

J. H. Becher, S. Baier, K. Aikawa, M. Lepers, J.-F. Wyart, O. Dulieu, and F. Ferlaino

Reference: 

10.1103/PhysRevA.97.012509

We report on the determination of the dynamical polarizability of ultracold erbium atoms in the ground and in one excited state at three different wavelengths, which are particularly relevant for optical trapping. Our study combines experimental measurements of the light shift and theoretical calculations. In particular, our experimental approach allows us to isolate the different contributions to the polarizability, namely, the isotropic scalar and anisotropic tensor part.

Observation of the Roton Mode in a Dipolar Quantum Gas

Date: 
2017-05-19
Author(s): 

Lauriane Chomaz, Rick M. W. van Bijnen, Daniel Petter, Giulia Faraoni, Simon Baier, Jan Hendrik Becher, Manfred J. Mark, Falk Waechtler, Luis Santos, Francesca Ferlaino

Reference: 

arXiv:1705.06914

The concept of a roton, a special kind of elementary excitation, forming a minimum of energy at finite momentum, has been essential to understand the properties of superfluid

Outreach event: Celebrate Science fair at Durham University (24th - 26th October 2017)

The Durham Atomic and Molecular Physics group run an interactive activity focussing on optical communications and fibres aimed at primary school children which was part of Durham University's annual "Celebrate Science" fair.

Outreach activity: Saturday Morning Physics "The Mystery and Mastery of Photons" (talk by Charles Adams and interactive experiments at Durham University, 18th November 2017)

The event was part of the "Saturday morning Physics"-series hosted by the Durham Physics department and featured a talk by Prof. Charles Adams aimed at the general public followed by a series of hands-on demonstrations and labtours.

A high repetition rate experimental setup for quantum non-linear optics with cold Rydberg atoms

Date: 
2016-12-19
Author(s): 

Hannes Busche, Simon W. Ball, Paul Huillery

Reference: 

Eur. Phys. J. Special Topics 225, 2839-2861 (2016)

sing electromagnetically induced transparency and photon storage, the strong dipolar interactions between Rydberg atoms and the resulting dipole blockade can be mapped onto light fields to realise optical non-linearities and interactions at the single photon level. We report on the realisation of an experimental apparatus designed to study interactions between single photons stored as Rydberg excitations in optically trapped microscopic ensembles of ultracold 87Rb atoms.

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