Berlin 2014 – scientific programme
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SYQR: Symposium Quantum Repeater
SYQR 1: Flying/Stationary Qubit Conversion and Entanglement Generation
SYQR 1.3: Talk
Monday, March 17, 2014, 11:00–11:15, UDL HS2002
Interfacing Superconducting Qubits and Optical Photons via a Rare-Earth Doped Crystal — •Nikolai Lauk1, Christopher O’Brien1, Susanne Blum2, Giovanna Morigi2, and Michael Fleischhauer1 — 1Fachbereich Physik und Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany — 2Universität des Saarlandes, Saarbrücken, Germany
Superconducting qubits (SCQ) are promising candidates for scalable quantum computation. However, they are essentially stationary, which makes the transport of quantum information difficult. Telecom-wavelength photons on the other hand, are the best candidates for transporting quantum information, due to the availability of low loss optical fibers.
By interfacing telecom photons with SCQ’s one can combine the advantages of both systems to build a quantum network. To this end, we propose and theoretically analyze a scheme for coupling optical photons to a SCQ, mediated by a rare earth doped crystal (REDC). In the first step an optical photon is absorbed in a controlled way into a REDC. This optical excitation is then moved into the spin state using a series of π-pulses and is subsequently transferred to a SCQ through a microwave cavity. Due to intrinsic and engineered inhomogeneous broadening of the optical and spin transitions employed in REDC for the storage of optical photons, we require a special transfer protocol using staggered π-pulses to first move the population into the microwave cavity and then from the cavity to the qubit.