Multi-path entanglement of two photons
A. Rossi, G. Vallone, A. Chiuri, F. De Martini, P. Mataloni
TL;DR
This paper introduces an integrated optical device that efficiently generates multi-path entangled states of two photons, enabling advanced quantum information processing by encoding qubits and qudits in their momentum modes.
Contribution
The novel device combines micro-lenses and optical fibers to produce multi-path entanglement, advancing the practical generation of complex quantum states.
Findings
Successfully generates multi-path entangled states
Enables encoding of qubits and qudits in photon momentum modes
Potential applications in quantum information technology
Abstract
We present a novel optical device based on an integrated system of micro-lenses and single mode optical fibers. It allows to collect and direct into many modes two photons generated by spontaneous parametric down conversion. By this device multiqubit entangled states and/or multilevel qu-it states of two photons, encoded in the longitudinal momentum degree of freedom, are created. The multi-path photon entanglement realized by this device is expected to find important applications in modern quantum information technology.
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