Berlin 2018 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 1: Quantum Technologies (joint session HL/TT/TUT)

HL 1.4: Tutorium

Sonntag, 11. März 2018, 17:50–18:25, H 0105

Manipulation of quantum bits based on defect centres in diamond — •Oliver Benson — Institut für Physik der Humboldt-Universität zu Berlin, Newtonstrasse 15, 12489 Berlin

Quantum information processing relies on initialisation, manipulation, read-out and transmission of individual quantum bits. Defect centres in diamond are an example of stable, optically addressable single quantum systems in a solid-state matrix [1-4]. Their electronic states couple efficiently to light, and their energy level structure allows for long spin coherence time in the ground state. Moreover, coupling to nuclear spins in the diamond host provides storage of quantum bits for seconds. With this all ingredients for a full quantum information processing (QIP) architecture are present in one material platform. In this presentation, we introduce the fundamental concepts of QIP in diamond. We then describe recent breakthroughs, such as stationary to flying quantum bit conversion and entanglement of distant quantum bits [5]. Other applications of defect centres in diamond for quantum sensing [6] will be discussed as well.

[1] F. Jelezko and J. Wrachtrup, Phys. Status Solidi A, 203, 3207 (2006). [2] V. Acosta, P. Hemmer, MRS Bull. 38, 127 (2013). [3] J. R. Weber, et al., PNAS 107, 8513 (2010). [4] I. Aharonovich, et al., Rep. Prog. Phys. 74, 076501 (2011). [5] H. Bernien, et al., Nature 497, 86 (2013) [6] S. Hong, et al., MRS Bull. 38, 155 (2013).