Berlin 2018 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 4: Superconductivity: Qubits I

TT 4.2: Vortrag

Montag, 12. März 2018, 09:45–10:00, H 2053

Coupling transmons to traveling waves by strongly blockaded EIT — •Felix Motzoi and Klaus Molmer — Dept. of Physics and Astronomy, Aarhus University, Denmark

There are numerous proposals for entangling superconducting qubits on separated chips, which can be used for modular computing architectures. Here, we present a method that employs itinerant traveling waves, without the need for the light to be stored in the cavity or interact directly with the qubit. Rather, an EIT mechanism is controlled dispersively by the qubit in the cavity (by shifting it in and out of resonance), effectively performing a CPHASE operation. By using an ancillary transmon qubit, the light-matter coupling strength can be greatly enhanced without negatively affecting the coherence time of the device. Such a scheme can be used with coherent light fields and without the need for measurement, offering potential for high practicality.