Fidelity spectrum: A tool to probe the property of a quantum phase
Chi Yu Wing†, , Gu Shi-Jian
       

(Left) The scaling behavior of SF at the critical point of the 1D transverse-field Ising model. The straight line shows the linear fit of −1.89lnN/N + 0.89. (Right) The scaling behavior of SF in the non-critical region. The slope of the straight line is 1 (maximum error = ±0.001).