ELFT HÍRADÓ

[tcsaba <tcsaba AT eik.bme.hu>]

                   M E G H Í V Ó - I N V I T A T I O N

    Seminar Series of the Department of Theoretical Physics at the
           Budapest University of Technology and Economics


                             Viktor Ivády
                (Linköping University, Sweden, and
            Wigner Research Centre for Physics, Budapest)

        Optical dynamic nuclear spin polarization through
                solid-state quantum bit processing


Advances in solid-state quantum information processing turned to have a 
large impact on other fields of physics, thanks to the numerous 
entanglement based processes and protocols that were worked out in 
recent years. In this seminar, we consider such a process, the optical 
dynamic nuclear spin polarization (ODNP) process, which may become an 
important part of future quantum information processing, nanoscale 
metrology, and sensitivity-enhanced nuclear magnetic resonance 
applications.
Briefly, we first shortly review the physics of important paramagnetic 
point defects in semiconductors that serve as optically addressable 
solid-state quantum bits. We consider the optical electron spin 
polarization cycle, heterogeneous electron - nuclear spin systems, and 
the possibility of spin polarization transfer via the hyperfine 
interaction. Then, we review ODNP and introduce a general model allows 
us to understand different aspects of this process. Finally, we discuss 
recent results on the ground state ODNP of weakly coupled nuclei.

[1] A. L. Falk et al, Phys. Rev. Lett. 114, 247603 (2015).
[2] V. Ivády et al, Phys. Rev. B 92, 115206 (2015).

Idöpont: 2016. április 1. péntek, 10:15
Helyszín: BME Fizikai Intézet, Elméleti Fizika Tanszék,
Budafoki út 8. F-épület, III lépcsöház, szemináriumi szoba