AI Article Synopsis
- Optical quantum computation needs carefully created multimode photonic quantum states to function effectively.
- The study shows the successful phase locking of two all-optical quantum memories, which allows for the precise timing of releasing two-mode entangled single-photon states.
- The released states maintain their entanglement and nonclassical properties even with release-time differences of up to 400 nanoseconds, validated through advanced measurement techniques.
Article Abstract
Optical approaches to quantum computation require the creation of multimode photonic quantum states in a controlled fashion. Here we experimentally demonstrate phase locking of two all-optical quantum memories, based on a concatenated cavity system with phase reference beams, for the time-controlled release of two-mode entangled single-photon states. The release time for each mode can be independently determined. The generated states are characterized by two-mode optical homodyne tomography. Entanglement and nonclassicality are preserved for release-time differences up to 400 ns, confirmed by logarithmic negativities and Wigner-function negativities, respectively.
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| http://dx.doi.org/10.1103/PhysRevLett.125.260508 | DOI Listing |
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