July 2017
Spotlight Summary by Filippo Miatto
Experimental nonlocal steering of Bohmian trajectories
According to Bell's theorem, any realistic theory that wants to reproduce the statistics of Quantum Mechanics (QM) has to have non-local components. Bohmian Mechanics (BM) is probably at the end of the spectrum: it is deterministic and the hidden variables are explitcit and blatantly non-local (but not directly measurable).
By exploiting the entanglement between the degrees of freedom of a pair of photons, Ya Xiao and colleagues managed to measure the Bohmian velocity of a photon and to show that indeed if one tinkers with one photon in the pair, the trajectory of the other is non-locally affected. Typically, this is explained in QM by saying that a measurement on one photon projects the state of the other, and this argument is in excellent standing. However, one could also translate this effect into the formalism of BM, and reinterpret the results to fit within that scheme, and that's allowed too: it's the beauty of looking at the same world from different viewpoints.
You must log in to add comments.
By exploiting the entanglement between the degrees of freedom of a pair of photons, Ya Xiao and colleagues managed to measure the Bohmian velocity of a photon and to show that indeed if one tinkers with one photon in the pair, the trajectory of the other is non-locally affected. Typically, this is explained in QM by saying that a measurement on one photon projects the state of the other, and this argument is in excellent standing. However, one could also translate this effect into the formalism of BM, and reinterpret the results to fit within that scheme, and that's allowed too: it's the beauty of looking at the same world from different viewpoints.
Add Comment
You must log in to add comments.
Article Information
Experimental nonlocal steering of Bohmian trajectories
Ya Xiao, Yaron Kedem, Jin-Shi Xu, Chuan-Feng Li, and Guang-Can Guo
Opt. Express 25(13) 14463-14472 (2017) View: Abstract | HTML | PDF