Abstract
Quantum illumination employs entangled states to detect a weakly reflecting target in a thermal bath. The performance of a given entangled state is evaluated from the minimum error probability in the asymptotic limit, which is compared against the optimal coherent state scheme. Using a relationship between the minimum error probability and quantum Fisher information, we compare the optimal performance of definite photon-number entangled states against that of coherent states under local repetitive strategies. When optimized under the constraint of a fixed total energy, we find that a coherent state outperforms the definite photon-number entangled states with the same signal energy.
| Original language | English |
|---|---|
| Pages (from-to) | 1316-1322 |
| Number of pages | 7 |
| Journal | Journal of the Optical Society of America B: Optical Physics |
| Volume | 39 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 2022 |