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
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 nondestructive 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.
Topics & Concepts
Cluster statePhotonicsQubitPhysicsPhotonQuantum mechanicsQuantum computerCoherent statesElectronState (computer science)QuantumTopology (electrical circuits)Computer scienceMathematicsAlgorithmCombinatoricsQuantum Information and CryptographyQuantum and electron transport phenomenaQuantum optics and atomic interactions