Gershoni, David

Date: Monday, January 11, 2016
Time: 14:00
Place: ETH Zurich, Hönggerberg, HPF G 6
Host: Atac Imamoglu

Deterministic Generation of a Cluster State of Polarization-Entangled Single Photons

David Gershoni
Technion Israel Institute of Technology, Haifa, Israel

I will report on deterministic generation of a highly entangled, one dimensional state of many photons. The quantum state generated, called a “cluster state,” is an important resource for quantum information processing [1]. Our demonstration follows the proposal of Lindner and Rudolph [2], which suggested repeated optical excitations of an electronic spin confined in a single semiconductor quantum dot. We use a dark exciton [3-4], instead of the electron, and demonstrate a practical realization of the proposal. Our demonstration therefore presents a possible breakthrough in quantum technology: we realize a deterministic source of many entangled photons, greatly reducing the resources needed for quantum information processing.

References

[1] R. Raussendorf and H. J. Briegel, Phys. Rev. Lett. 86, 5188 (2001)
[2] N. H. Lindner and T. Rudolph, Phys. Rev. Lett. 103, 113602 (2009)
[3] E. Poem et al., Nature Physics 6, 993-997, (2010)
[4] I. Schwartz et al., Phys. Rev. X. 5, 011009, (2015)