Regensburg 2019 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 10: Quantum information systems

HL 10.3: Vortrag

Montag, 1. April 2019, 15:30–15:45, H36

Entangling distant single electron spin qubits via circuit quantum electrodynamics — •Mónica Benito and Guido Burkard — Department of Physics, University of Konstanz, Konstanz, Germany

The recent realization of a coherent interface between electron spin qubits fabricated in quantum dots and superconducting transmission line resonators [1,2,3] opens the way for implementing resonator-mediated two-qubit entangling gates. In order to couple a spin to the resonator electric field, some type of spin-charge hybridization is needed, which deteriorates the coherence properties of the spin qubit. In this work we focus on single electron spin qubits placed in double quantum dots and hybridized to the charge degree of freedom via an externally applied magnetic field gradient [4]. We calculate entangling gate fidelities both in the dispersive and resonant regime accounting for errors due to the spin-charge hybridization.

[1] X. Mi et al., Nature 555, 599 (2018).

[2] N. Samkharadze et al., Science 359, 1123 (2018).

[3] A. J. Landig et al., Nature 560, 179 (2018).

[4] M. Benito et al., Phys. Rev. B 96, 235434 (2017).