Control Design for Inhomogeneous-Broadening Compensation in Single-Photon Transducers

We report a transducer of single photons between microwave and optical frequencies can be used to realize quantum communication over optical fiber links between distant superconducting quantum computers. A promising scalable approach to constructing such a transducer is to use ensembles of quantum e...

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Bibliographic Details
Published in:Physical review applied 2021-10, Vol.16 (4), Article 044025
Main Authors: Mishra, Sattwik Deb, Trivedi, Rahul, Safavi-Naeini, Amir H., Vučković, Jelena
Format: Article
Language:English
Subjects:
ATOMIC AND MOLECULAR PHYSICS
detectors
microwave techniques
optical quantum information processing
optical sources
optical techniques
optoelectronics
photonics
quantum control
quantum information with solid state qubits
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Summary:We report a transducer of single photons between microwave and optical frequencies can be used to realize quantum communication over optical fiber links between distant superconducting quantum computers. A promising scalable approach to constructing such a transducer is to use ensembles of quantum emitters interacting simultaneously with electromagnetic fields at optical and microwave frequencies. However, inhomogeneous broadening in the transition frequencies of the emitters can be detrimental to this collective action. In this paper, we utilize a gradient-based optimization strategy to design the temporal shape of the laser field driving the transduction system to mitigate the effects of inhomogeneous broadening. We study the improvement of transduction efficiencies as a function of inhomogeneous broadening in different single-emitter cooperativity regimes and correlate it with a restoration of super-radiance effects in the emitter ensembles. Furthermore, to assess the optimality of our pulse designs, we provide certifiable bounds on the design problem and compare them to the achieved performance.
ISSN:2331-7019
2331-7019
DOI:10.1103/PhysRevApplied.16.044025