Mainz 2017 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 40: Poster: Quantum Optics and Photonics II
Q 40.35: Poster
Wednesday, March 8, 2017, 17:00–19:00, P OG2
Microwave quantum logic for high fidelity quantum simulation with 9Be+ ions — •Sebastian Grondkowski1, Timko Dubielzig1, Fabian Ude1, Hening Hahn2,1, Giorgio Zarantonello2,1, Martina Wahnschaffe2,1, Amado Bautista-Salvador2,1, and Christian Ospelkaus1,2 — 1Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover — 2Physikalisch-Technische-Bundesanstalt Braunschweig, Bundesallee 100, 38116 Braunschweig
We describe the necessary experimental infrastructure to perform experiments with an integrated microwave near-field surface-electrode ion trap developed in our group [1] at cryogenic temperatures with applications in quantum simulation and quantum logic. We discuss our loading scheme using a pulsed laser for ablating and a subsequent cw-laser at 235 nm for photo-ionization [2]. An additional laser beam at 313 nm is used for cooling, repumping and detetion of 9Be+ hyperfine qubit ions, similar to [3]. We use a set of water cooled coils which produce a magnetic field of 22.3 mT. At this field the qubit transition becomes field-independent in first order, making the qubit robust against fluctuations. We discuss a sophisticated pulse-shaping scheme to implement quantum logic operations with high fidelity using short microwave pulses (cf. [4]).
[1] M. Carsjens et al., Appl. Phys. B 114, 243-250 (2014)
[2] H.-Y. Lo et al., Appl. Phys. B 114, 17-25 (2014)
[3] A.C. Wilson et al., Appl. Phys. B 105, 741-748 (2011)
[4] D. Hayes et al., PRL 109, 020503 (2012)