title: Ghost imaging without discord.
abstract: Ragy and Adesso argue that quantum discord is involved in the formation of a pseudothermal ghost image. We show that quantum discord plays no role in spatial light modulator ghost imaging, i.e., ghost-image formation based on structured illumination realized with laser light that has undergone spatial light modulation by the output from a pseudorandom number generator. Our analysis thus casts doubt on the degree to which quantum discord is necessary for ghost imaging.
authors.affiliation: Research Laboratory of Electronics, Massachusetts Institute of Technology 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA. jhs@mit.edu
authors.forename: Jeffrey H
authors.initials: JH
authors.lastname: Shapiro
authors.forename: Dheera
authors.initials: D
authors.lastname: Venkatraman
authors.forename: Franco N C
authors.initials: FN
authors.lastname: Wong
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D007089:Image Enhancement; D007090:Image Interpretation, Computer-Assisted; D007834:Lasers; D008029:Lighting / Q000295:instrumentation / Q000379:methods*; D011789:Quantum Theory; D012542:Scattering, Radiation; D013816:Thermodynamics