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arXiv · 2303.02899

Deterministic generation of shaped single microwave photons using a parametrically driven coupler

Jiaying Yang·Axel Eriksson·Mohammed Ali Aamir·Ingrid Strandberg·Claudia Castillo Moreno·Daniel Perez Lozano·Per Persson·Simone Gasparinetti
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Abstract

A distributed quantum computing system requires a quantum communication channel between spatially separated processing units. In superconducting circuits, such a channel can be realized by using propagating microwave photons to encode and transfer quantum information between an emitter and a receiver node. Here we experimentally demonstrate a superconducting circuit that deterministically transfers the state of a data qubit into a propagating microwave mode, with a process fidelity of 94.5%. We use a time-varying parametric drive to shape the temporal profile of the propagating mode to be time-symmetric and with constant phase, so that reabsorption by the receiving processor can be implemented as a time-reversed version of the emission. We demonstrate a self-calibrating routine to correct for time-dependent shifts of the emitted frequencies due to the modulation of the parametric drive. Our work provides a reliable method to implement high-fidelity quantum state transfer and remote entanglement operations in a distributed quantum computing network.

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Jiaying Yang, Axel Eriksson, Mohammed Ali Aamir, Ingrid Strandberg, Claudia Castillo Moreno, Daniel Perez Lozano, Per Persson, Simone Gasparinetti. 2023-03-06. Deterministic generation of shaped single microwave photons using a parametrically driven coupler. https://doi.org/10.1103/physrevapplied.20.054018

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