Weak measurements with orbital angular momentum pointer states

Abstract

Weak measurements are a unique tool for accessing information about weakly interacting quantum systems with minimal back action. Joint weak measurements of single-particle operators with pointer states characterized by a two-dimensional Gaussian distribution can provide, in turn, key information about quantum correlations which can be of relevance for quantum information applications. Here we demonstrate that by employing two-dimensional pointer states endowed with orbital angular momentum (OAM), it is possible to extract weak values of the higher order moments of single-particle operators, an inaccessible quantity with Gaussian pointer states only. We provide a specific example that illustrates the advantages of our method both, in terms of signal enhancement, and information retrieval.

5 pages, accepted for publication in Phys. Rev. Lett

References in corpus (6)

• Ultrasensitive Beam Deflection Measurement via Interferometric Weak Value Amplification
• Quantized Rotation of Atoms From Photons with Orbital Angular Momentum
• A Primer for Black Hole Quantum Physics
• Weak values and the Leggett-Garg inequality in solid-state qubits
• Higher-order Laguerre-Gauss mode generation and interferometry for gravitational wave detectors
• Optimal Probe Wavefunction of Weak-Value Amplification

Cited by in corpus (3)

• Measuring ultrasmall time delays of light by joint weak measurements
• Extracting joint weak values from two-dimensional spatial displacements
• Joint weak value for all order coupling using continuous variable and qubit probe