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Q: Fachverband Quantenoptik und Photonik
Q 24: Quantum Information (Quantum Computing)
Q 24.2: Vortrag
Mittwoch, 11. März 2020, 11:30–11:45, e001
Sub-microsecond entangling gate between trapped ions via Rydberg interaction — •Chi Zhang1, Fabian Pokorny1, Weibin Li2, Gerard Higgins1, Igor Lesanovsky2,3, and Chi Zhang1 — 1Department of Physics, Stockholm University, 10691 Stockholm, Sweden — 2School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, United Kingdom — 3Institut für Theoretische Physik, Universität Tübingen, Auf der Morgenstelle 14, 72076 Tübingen, Germany
Trapped Rydberg ions [1] are a novel approach for quantum information processing. By combining the high degree of control of trapped ions with the strong dipolar interaction of Rydberg atoms, fast entanglement gates may be realized in large ion crystals.
In our experiment, we excite trapped 88Sr+ ions to Rydberg states [2,3]. We have observed strong interaction between microwave-dressed Rydberg ions as a Rydberg blockade [4]. Recently, we have realized a controlled phase gate in a two ion crystal within only 700ns and entangled the ions with more than 70% fidelity [4]. This fast gate does not rely on ion motion, so it could also be applied in longer ion crystals. These are fundamental steps towards a trapped Rydberg ion quantum computer or simulator.
[1] M. Müller, et al., New J. Phys. 10, 093009 (2008).
[2] G. Higgins, et al., Phys. Rev. X 7, 021038 (2017).
[3] G. Higgins, et al., Phys. Rev. Lett. 119, 220501 (2017).
[4] C.Z. et al., arXiv:1908.11284 (2019).