Experimental quantum teleportation of propagating microwaves

Abstract

The modern field of quantum communication thrives on promise to deliver efficient and unconditionally secure ways to exchange information by exploiting quantum laws of physics. Here, quantum teleportation stands out as an exemplary protocol allowing for the disembodied and safe transfer of unknown quantum states using quantum entanglement and classical communication as resources. The experimental feasibility of quantum teleportation with propagating waves, relevant to communication scenarios, has been demonstrated in various physical settings. However, an analogous implementation of quantum teleportation in the microwave domain was missing so far. At the same time, recent breakthroughs in quantum computation with superconducting circuits have triggered a demand for quantum communication between spatially separated superconducting processors operated at microwave frequencies. Here, we demonstrate a realization of deterministic quantum teleportation of coherent microwave states by exploiting two-mode squeezing and analog feedforward over macroscopic distances $d=42$cm. We achieve teleportation fidelities $F=0.689\pm 0.004$ exceeding the no-cloning $F_{\mathrm{nc}}=2/3$ threshold for coherent states with an average photon number of up to $n_{\mathrm{d}}=1.1$. Our results provide a key ingredient for the teleportation-based quantum gate for modular quantum computing with superconducting circuits and establish a solid foundation for future microwave quantum local area networks.

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Cited by in corpus (25)

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• Propagating Quantum Microwaves: Towards Applications in Communication and Sensing
• Deterministic quantum teleportation between distant superconducting chips
• Nonlinearity and Parametric Amplification of Superconducting Nanowire Resonators in Magnetic Field
• Perspectives of microwave quantum key distribution in open-air
• Long-distance distribution of qubit-qubit entanglement using Gaussian-correlated photonic beams
• Demonstration of microwave single-shot quantum key distribution
• Open-Air Microwave Entanglement Distribution for Quantum Teleportation
• Kinetic Inductance Parametric Converter
• Autonomous Distribution of Programmable Multiqubit Entanglement in a Dual-Rail Quantum Network
• Cryogenic microwave link for quantum local area networks
• Deterministic generation of shaped single microwave photons using a parametrically driven coupler
• Imperfect photon detection in quantum illumination
• Noise mitigation in quantum teleportation
• Quantum microwave parametric interferometer
• Teleportation and Entanglement Swapping of Continuous Quantum Variables of Microwave Radiation
• Compact inductor-capacitor resonators at sub-gigahertz frequencies
• Flow of quantum correlations in noisy two-mode squeezed microwave states
• Two-dimensional Planck spectroscopy for microwave photon calibration
• Fast atom-photon entangling gates with a superconducting coplanar waveguide
• Hybrid Analog Teleportation-Direct Transmission in Noisy Bosonic Channels
• Proposal for an autonomous quantum heat engine
• Optomagnonic continuous-variable quantum teleportation enhanced by non-Gaussian distillation