Measuring the temperature of the spin via weak measurement

In this study, we give a new proposal to measure the temperature of the spin in a sample in a magnetic resonance force microscopy system by using postselected weak measurement, and investigating the Fisher information to estimate the precision of the scheme. We show that in a high temperature regime the temperature of the spin can be measured via a weak measurement technique with proper postselection and our scheme is able to increase the precision of temperature estimation.