Compasslike states in a thermal reservoir and fragility of their
nonclassical features
Compasslike states in a thermal reservoir and fragility of their
nonclassical features
Superposed photon-added and photon-subtracted squeezed-vacuum states exhibit sub-Planck phase-space structures and metrological potential similar to the original compass states (superposition of four coherent states), but are more closely tied to modern experiments. Here, we observe that these compasslike states are highly susceptible to loss of quantum coherence when placed in …