Spin-photon entanglement with direct photon emission in the telecom C-band.

ABSTRACT: Quantum networks, relying on the distribution of quantum entanglement between remote locations, have the potential to transform quantum computation and secure long-distance quantum communication. However, a fundamental ingredient for fibre-based implementations of such networks, namely entanglement between a single spin and a photon directly emitted at telecom wavelengths, has been unattainable so far. Here, we use a negatively charged exciton in an InAs/InP quantum dot to implement an optically active spin qubit taking advantage of the lowest-loss transmission window, the telecom C-band. We investigate the coherent interactions of the spin-qubit system under resonant excitation, demonstrating high fidelity spin initialisation and coherent control using picosecond pulses. We further use th

SUBMITTER: Laccotripes P 

PROVIDER: S-EPMC11554671 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature