Entanglement produced by pairs of superposed two-mode coherent and subharmonic cavity light beams
Menwuyelet Melaku, Deribe Hirpo · 2025
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Description
Menwuyelet Melaku and Deribe Hirpo analyze the quantum properties of light formed by superposing two kinds of two-mode cavity beams, one coherent and one subharmonic. The cavity couples to a vacuum reservoir through a single-port mirror. Solving the quantum Langevin equations, the authors build Q-functions for each beam type. They then combine them for the superposed beam and study its statistics.
The superposed light turns out to be squeezed, with the squeezing in the plus quadrature. At steady state and at threshold, squeezing reaches 25 percent below the vacuum level. Several standard tests agree the beams are entangled: the correlated squeezed photons show about 75 percent entanglement by one criterion. A logarithmic negativity check confirms entanglement at about 50 percent. The paper adds the case to the catalog of entangled light sources that quantum optics can exploit.
Catalog record
| CREATOR | Menwuyelet Melaku, Deribe Hirpo |
|---|---|
| YEAR | 2025 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 134 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |