Alladi Ramakrishnan Hall

Quantum teleportation of optical qubits using Gaussian resources

Soumyakanti Bose

Dept. of Physics & Astronomy, Seoul National University, Korea

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 α≲1,
while single-photon qubits yield better results for
larger amplitudes. We analyze further the effect 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.

Link: doi.org/10.1103/PhysRevA.105.032434.