Quantum teleportation of hybrid qubits and single-photon qubits using Gaussian resources

Abstract

In this paper, we compare single-photon qubits and hybrid qubits as information carriers through quantum teleportation using a Gaussian continuous-variable channel. A hybrid qubit in our study is in the form of entanglement between a coherent state and a single photon. We find that hybrid qubits outperform photonic qubits when coherent amplitudes of the hybrid qubits are as low as $\alpha \lesssim 1$, while photonic qubits yield better results for larger amplitudes. We analyze effects of photon losses, and observe that the overall character of teleportation for different qubits remains the same although the teleportation fidelities are degraded by photon losses. Our work provides a comparative look at practical quantum information processing with different types of qubits.

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• Wavelength conversion for single-photon polarization qubits through continuous variable quantum teleportation
• Deterministic generation of hybrid entangled states using quantum walks
• Linear optical quantum computing with a hybrid squeezed cat code
• Photonic Hybrid Quantum Computing