Controllable Non-Markovianity for a Spin Qubit in Diamond.

Autor: Haase JF; Institut für Theoretische Physik und IQST, Albert-Einstein-Allee 11, Universität Ulm, D-89069 Ulm, Germany., Vetter PJ; Institut für Quantenoptik und IQST, Albert-Einstein-Allee 11, Universität Ulm, D-89069 Ulm, Germany., Unden T; Institut für Quantenoptik und IQST, Albert-Einstein-Allee 11, Universität Ulm, D-89069 Ulm, Germany., Smirne A; Institut für Theoretische Physik und IQST, Albert-Einstein-Allee 11, Universität Ulm, D-89069 Ulm, Germany., Rosskopf J; Institut für Theoretische Physik und IQST, Albert-Einstein-Allee 11, Universität Ulm, D-89069 Ulm, Germany., Naydenov B; Institut für Quantenoptik und IQST, Albert-Einstein-Allee 11, Universität Ulm, D-89069 Ulm, Germany., Stacey A; Element Six, Harwell Campus, Fermi Avenue, Didcot OX11 0QR, United Kingdom.; Centre for Quantum Computation and Communication Technology, School of Physics, University of Melbourne, Parkville, Melbourne, Victoria 3010, Australia., Jelezko F; Institut für Quantenoptik und IQST, Albert-Einstein-Allee 11, Universität Ulm, D-89069 Ulm, Germany., Plenio MB; Institut für Theoretische Physik und IQST, Albert-Einstein-Allee 11, Universität Ulm, D-89069 Ulm, Germany., Huelga SF; Institut für Theoretische Physik und IQST, Albert-Einstein-Allee 11, Universität Ulm, D-89069 Ulm, Germany.
Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2018 Aug 10; Vol. 121 (6), pp. 060401.
DOI: 10.1103/PhysRevLett.121.060401
Abstrakt: We present a flexible scheme to realize non-Markovian dynamics of an electronic spin qubit, using a nitrogen-vacancy center in diamond where the inherent nitrogen spin serves as a regulator of the dynamics. By changing the population of the nitrogen spin, we show that we can smoothly tune the non-Markovianity of the electron spin's dynamics. Furthermore, we examine the decoherence dynamics induced by the spin bath to exclude other sources of non-Markovianity. The amount of collected measurement data is kept at a minimum by employing Bayesian data analysis. This allows for a precise quantification of the parameters involved in the description of the dynamics and a prediction of so far unobserved data points.
Databáze: MEDLINE
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