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

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 receive...

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Bibliographic Details
Published in:arXiv.org 2023-12
Main Authors: Yang, Jiaying, Eriksson, Axel, Mohammed Ali Aamir, Strandberg, Ingrid, Claudia Castillo Moreno, Daniel Perez Lozano, Persson, Per, Gasparinetti, Simone
Format: Article
Language:English
Subjects:
Accuracy
Circuits
Communications systems
Emitters
Microprocessors
Photons
Propagation modes
Quantum computing
Quantum entanglement
Quantum phenomena
Qubits (quantum computing)
Superconductivity
Time dependence
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.2303.02899