May 2nd, 2018 ANA ASENJO Theoretical Quantum-Nano Photonics

ICFO strongly supports actions that encourage and empower women in science and in keeping with this goal, offers the “Women in Science” series. These events aim to increase the visibility of female researchers at the institute, create a discussion forum on specific topics of interest, and create an informal space for networking.

The events are held on a monthly basis and target all women researchers at ICFO, as well as allies.

The scientific seminar will be followed by a topical discussion on career progression for women in science with a light lunch in situ.


ANA ASENJO: ‘Quantum optics in ordered atomic arrays

Dissipation is a pervasive problem in many areas of physics. In quantum optics, losses curb our ability to realize controlled and efficient interactions between photons and atoms, which are essential for many technologies ranging from quantum information processing to metrology. Spontaneous emission - in which photons are first absorbed by atoms and then re-scattered into undesired channels - imposes a fundamental limit in the fidelities of many quantum applications, such as quantum memories and gates. Typically, it is assumed that this process occurs at a rate given by a single isolated atom. However, this assumption can be substantially violated: interference in photon emission and absorption generates correlations and entanglement among atoms, thus making dissipation a collective phenomenon. In this talk, I will discuss the physics of subradiance, a form of collective dissipation in which interference is destructive and atomic decay is inhibited. Exploiting subradiant states of ordered atomic arrays allows for the realization of a quantum memory with a photon retrieval fidelity that performs dramatically better with number of atoms than previously known bounds. This single example illustrates how ordered arrays transcend the "standard model" of disordered atomic ensembles, and suggests that we should re-examine well-known concepts in quantum optics in a new light.

** Please register in order to stay for the lunch and networking.

Women in Science Lunch, May 2, 2018, 12:30-14:30. Blue Lecture Room