Detecting momentum weak value: Shack-Hartmann versus a weak measurement wavefront sensor

Abstract

The task of wavefront sensing is to measure the phase of the optical field. Here, we demonstrate that the widely used Shack-Hartmann wavefront sensor detects the weak value of transverse momentum, usually achieved by the method of quantum weak measurement. We extend its input states to partially coherent states and compare it with the weak measurement wavefront sensor, which has a higher spatial resolution but a smaller dynamic range. Since weak values are commonly used in investigating fundamental quantum physics and quantum metrology, our work would find essential applications in these fields.

3 pages, 2 figures

References in corpus (10)

• Direct Measurement of the Quantum Wavefunction
• Colloquium: Understanding Quantum Weak Values: Basics and Applications
• Direct measurement of general quantum states using weak measurement
• Observing Dirac's classical phase space analog to the quantum state
• Wavefront sensing reveals optical coherence
• Modular values and weak values of quantum observables
• Experimental nonlocal steering of Bohmian trajectories
• Observing momentum disturbance in double-slit "which-way" measurements
• Quantum reconstruction of the mutual coherence function
• What dynamics can be expected for mixed states in two-slit experiments?

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• Reconstructing the multiphoton spatial wave function with coincidence wavefront sensing
• Twenty years of quantum contextuality at USTC