What does it take to detect entanglement with the human eye?

16.06.2016, 16.30 – 18:00

2016/06/16 16:30-18:00

Speaker: Valentina Caprara Vivoli | Location: Hochschulstraße 10 (S2|02), Piloty Building, Room B002, Darmstadt

Organizer: Giulia Traverso, Oleg Nikiforov


Tremendous progress has been realized in quantum optics for engineering and detecting the quantum properties of light. Today, photon pairs are routinely created in entangled states. Entanglement is revealed using single-photon detectors in which a single photon triggers an avalanche current. The resulting signal is then processed and stored in a computer. I propose an approach to get rid of all the electronic devices between the photons and the experimentalist, i.e., to use the experimentalist’s eye to detect entanglement. I show in particular that the micro-entanglement that is produced by sending a single photon into a beam splitter can be detected with the eye using the magnifying glass of a displacement in phase space. The feasibility study convincingly demonstrates the possibility of realizing the first experiment where entanglement is observed with the eye.

Short Bio

Valentina Caprara Vivoli accomplished her bachelor and master degree in theoretical physics at the University of Palermo. Her master thesis, “Superfluidity and vortices in Bose-Einstein Condensates”, has been performed in collaboration with Professor A. Sanpera at the Autonomous University of Barcelona, Spain. She subsequently moved to Geneva for her PhD in Professor N. Gisin’s group. Here, she focused her attention on how to implement quantum information experiments using quantum optics. In particular, she worked on how to detect entanglement and nonlocality in few photon states. She recently moved to TUDelft for a PostDoc position in quantum information in Professor S. Wehner’s group.