PT Journal
AU Karuseichyk, I
   Sorelli, G
   Walschaers, M
   Treps, N
   Gessner, M
TI Resolving mutually-coherent point sources of light with arbitrary statistics
SO Physical Review Research
JI Phys. Rev. Res.
PY 2022
BP 043010
EP 11pp
VL 4
IS 4
DI 10.1103/PhysRevResearch.4.043010
LA English
AB We analyze the problem of resolving two mutually coherent point sources with arbitrary quantum statistics, mutual phase, and relative and absolute intensity. We use a sensitivity measure based on the method of moments and compare direct imaging with spatial-mode demultiplexing (SPADE), analytically proving advantage of the latter. We show that the moment-based sensitivity of SPADE saturates the quantum Fisher information for all known cases, even for non-Gaussian states of the sources.
ER