# Quantum precision thermometry with weak measurement

## TL;DR

This paper introduces a quantum thermometry method using weak measurements with finite probes, offering flexible and precise temperature sensing crucial for miniaturized electronic devices.

## Contribution

It presents a novel weak measurement-based thermometry scheme that enhances measurement flexibility and precision compared to traditional quantum Fisher Information methods.

## Key findings

- Comparable qualitative features to quantum Fisher Information protocols
- Allows tuning of the thermometric window via post-selection
- Potential for improved temperature sensing in miniaturized devices

## Abstract

As the minituarization of electronic devices, which are sensitive to temperature, grows apace, sensing of temperature with ever smaller probes is more important than ever. Genuinely quantum mechanical schemes of thermometry are thus expected to be crucial to future technological progress. We propose a new method to measure the temperature of a bath using the weak measurement scheme with a finite dimensional probe. The precision offered by the present scheme not only shows similar qualitative features as the usual Quantum Fisher Information based thermometric protocols, but also allows for flexibility over setting the optimal thermometric window through judicious choice of post selection measurements.