1 Department of Physics and Astronomy, Faculty of Science, Aarhus University, Aarhus University2 Teoretisk naturvidenskab, Aarhus University, Aarhus University3 Department of Physics and Astronomy, Science and Technology, Aarhus University4 Department of Physics and Astronomy, Science and Technology, Aarhus University
A quantum superposition of two coherent states of light with small amplitude can be obtained by subtracting a photon from a squeezed vacuum state. In experiments this preparation can be made conditioned on the detection of a photon in the field from a squeezed light source. We propose and analyze an extended measurement strategy which allows generation of high fidelity coherent state superpositions with larger amplitude.
Physical Review a (atomic, Molecular and Optical Physics), 2007, Vol 76, Issue 043840