Àngel Tarramera Gisbert, UMIL

Collective atomic recoil laser in 3D ultra-cold atomic clouds
Layman’s title: Collective light emission: Organizing ultra-cold atoms in 3D patterns

My activity in brief
In this theoretical project, I will study the atom organization emerging from 3D cold
atomic clouds when they are illuminated using a laser beam. Beside this selforganization,
these clouds start emitting radiation in a backwards direction. This
effect is called Collective Atom Recoil Laser (CARL). The description of the atoms
organization might be apply in a near future to how self-organized patterns are
generated and evolve. For instance, animal or plant cells arrangements, star
systems, reaction of neuronal responses to self generated impulses, etc. It may also
contribute to develop quantum computers and a range of different hypersensitive
sensors, like gravimeters.
The focus of the research
The project aims to formulate the basic model for an N cold atoms light-emitting
cloud. It will also consider the recoil that experience each atom of the cloud and
how this modify the collective laser effect. It will try to describe how the initial
emission in all direction of the cloud becomes a cooperative one (CARL). Since this
will become a very complex atomic system, it will be implemented into numerical
codes. This research will investigate both classical and quantum regimes.
Networking opportunities
I will have the opportunity to be in contact with several groups of the ColOpt
network. This exchange with industry partners, experimental academics groups (E)
and theoretical departments (T) will help to maximize the amount of useful results
for the scientific community. The groups that will directly contribute to develop the
results of this research project will be:
1. Institut Non Linéaire de Nice (INLN), France. Experimental Techniques (T+E).
2. Instituto de Física de São Carlos (IFSC), Brazil. Dynamics in lattices (T+E).
3. Universität Innsbruck (UINN), Austria. One dimension CARL (T).
4. National Physical Laboratory (NPL), UK. Coherent control and scattering (E).
5. Universität des Saarlandes (USAAR). Ultra-large nonlinearities (T).
Outcomes and impact
This study will provide a description of the creation of the collective light emission,
helping to understand the transition from uncoordinated regime to a cooperative
regime. It will also allow us to observe the spontaneous formation of periodic 3D
structures in atomic clouds. Finally, it will lead to experimental implementations with
ultra-cold atomic clouds.

Biography:  Àngel

I obtained a degree in Physics from Universitat de Barcelona and attained an
Erasmus Mundus MAster on Photonic NETworks Engineering (MAPNET) from
Scuola Superiore Sant’Anna and Osaka University. I completed the master thesis at
Technische Universität Berlin in “Nonlinear Effects in Graphene-integrated Silicon
Waveguides”. Between the degree and the master studies I work in the private
sector in a certification company, APPLUS, as a DAQ technician. Before enrolling in
the ColOpt network I spend a few months in the Universitat Politècnica de València
in the Photonics research Labs (ITEAM), investigating the application of novel pace-
Division Multiplexing technologies to Microwave Photonics.