Erlangen 2018 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics V
Q 62.74: Poster
Thursday, March 8, 2018, 16:15–18:15, Redoutensaal
Quantum non-Markovianity with single spins in diamond — •Philipp Vetter1, Jan Haase2, Thomas Unden1, Andrea Smirne2, Susana Huelga2, and Fedor Jelezko1 — 1Insitute for Quantum Optics, Ulm University, D-89081 Ulm — 2Institute for Theoretical Physics, Ulm University, D-89081 Ulm
We present an investigation of quantum non-Markovianity with single spins in diamond. We utilize the nitrogen vacancy centre, which enables full control of its electron spin as well as the inherent nitrogen spin. Non-Markovian dynamics are often linked to memory effects inside the environment, which allow a backflow of information into the system of interest [1]. Ramsey experiments on the electron spin are performed to demonstrate precise control of coherence revivals via the population of the nitrogen spin. In addition, we examine the noise floor felt by the electron spin, which originates from further impurities and spins in the diamond lattice. Using Bayesian inference, we estimate the deviation from a true semigroup evolution by polarizing the nitrogen into the non-interacting hyperfine state and a subsequent measurement of the free induction decay.
[1] Rivas, A., Huelga, S. F., & Plenio, M. B. (2014). Quantum non-Markovianity: characterization, quantification and detection. Reports on Progress in Physics, 77(9), 094001.