Proposal for monitoring and heralding position states of atoms in a one-dimensional waveguide
Alexandre Roulet, Colin Teo, Huy Nguyên Lê, Valerio Scarani · Physical Review A · 2014
We study single-photon transport in a single-mode waveguide, in which two-level atoms in spatial superpositions are embedded. We find that the transmission of the photon can be used as a nondestructive probe for the coherence of the superposition. Under certain trapping configurations, the protocol proposed is shown to be independent of which wells the atoms are initially trapped in. Furthermore, we show that by looking at the transmission in a suitable regime, a maximally entangled state can be postselected from an unknown superposition.