Switching-free time-domain optical quantum computation with quantum teleportation

Abstract

Optical switches and rerouting network are main obstacles to realize optical quantum computer. In particular, both components have been considered as essential components to the measurement-based time-domain optical quantum computation, which has seen promising developments regarding scalability in the recent years. Realizing optical switches and rerouting network with sufficient performance is, however, experimentally challenging as they must have extremely low loss, small switching time, high repetition rate, and minimum optical nonlinearity. In this work, we present an optical quantum computation platform that does not require such optical switches. Our method is based on continuous-variable measurement-based quantum computation, where instead of the typical cluster states, we modify the structure of the quantum entanglements, so that quantum teleportation protocol can be employed instead of the optical switching and rerouting. We also show that when combined with Gottesman-Kitaev-Preskill encoding, our architecture can outperform the architecture with optical switches when the optical losses of the switches are not low.

13 pages, 7 figures. Calculation mistakes are fixed and details of the analysis are added to the new version

References in corpus (9)

• Detection of 15 dB Squeezed States of Light and their Application for the Absolute Calibration of Photoelectric Quantum Efficiency
• Universal Quantum Computation with Continuous-Variable Cluster States
• Experimental generation of four-mode continuous-variable cluster states
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• Generation of one-million-mode continuous-variable cluster state by unlimited time-domain multiplexing
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Cited by in corpus (5)

• Propagating Gottesman-Kitaev-Preskill states encoded in an optical oscillator
• Generation of Flying Logical Qubits using Generalized Photon Subtraction with Adaptive Gaussian Operations
• Quantum thermal diode with additional control by auxiliary atomic states
• Photonic Hybrid Quantum Computing
• Nonlinear squeezing of superpositions of quadrature eigenstates