Detecting the degree of macroscopic quantumness using an overlap   measurement
  We investigate how to experimentally detect a recently proposed measure to quantify macroscopic quantum superpositions [Phys. Rev. Lett. 106, 220401 (2011)], namely, "macroscopic quantumness" $\mathcal{I}$. Schemes based on overlap measurements for harmonic oscillator states and for qubit states are extensively investigated. Effects of detection inefficiency and coarse-graining are analyzed in order to assess feasibility of the schemes. 
Hyunseok Jeong, Changsuk Noh, Seunglee Bae, Dimitris G. Angelakis and   Timothy C. Ralph
quant-ph