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arXiv · 2303.13244

Free-electron interactions with photonic GKP states: universal control and quantum error correction

Gefen Baranes·Shiran Even-Haim·Ron Ruimy·Alexey Gorlach·Raphael Dahan·Asaf A. Diringer·Shay Hacohen-Gourgy·Ido Kaminer
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Abstract

We show that the coherent interaction between free electrons and photons can be used for universal control of continuous-variable photonic quantum states in the form of Gottesman-Kitaev-Preskill (GKP) qubits. Specifically, we find that electron energy combs enable non-destructive measurements of the photonic state and can induce arbitrary gates. Moreover, a single electron interacting with multiple photonic modes can create highly entangled states such as Greenberger-Horne-Zeilinger states and cluster states of GKPs.

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Gefen Baranes, Shiran Even-Haim, Ron Ruimy, Alexey Gorlach, Raphael Dahan, Asaf A. Diringer, Shay Hacohen-Gourgy, Ido Kaminer. 2023-03-23. Free-electron interactions with photonic GKP states: universal control and quantum error correction. https://doi.org/10.1103/physrevresearch.5.043271

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