Weak value controversy

Abstract

Recent controversy regarding the meaning and usefulness of weak values is reviewed. It is argued that in spite of recent statistical arguments by Ferrie and Combes, experiments with anomalous weak values provide a useful amplification techniques for precision measurements of small effects in many realistic situations. The statistical nature of weak vales was questioned. Although measuring weak value requires an ensemble, it is argued that the weak value, similarly to an eigenvalue, is a property of a single pre- and post-selected quantum system.

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• Comment on 'How the result of a single coin toss can turn out to be 100 heads'
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Cited by in corpus (32)

• Approaching quantum-limited metrology with imperfect detectors by using weak-value amplification
• Anomalous weak values and contextuality: robustness, tightness, and imaginary parts
• Quantum circuits for measuring weak values, Kirkwood--Dirac quasiprobability distributions, and state spectra
• Determination of weak values of quantum operators using only strong measurements
• Interference experiment, anomalous weak value and Leggett-Garg test of macrorealism
• Direct Measurement of the Two-dimensional Spatial Quantum Wavefunction via Strong Measurements
• Unifying theory of quantum state estimation using past and future information
• Experimental simultaneous read out of the real and imaginary parts of the weak value
• Investigating the Effects of the Interaction Intensity in a Weak Measurement
• Scheme and Experimental Demonstration of Fully Atomic Weak Value Amplification
• Weak value amplification of photon number operators in the optomechanical interaction
• Experimental probe of weak value amplification and geometric phase through the complex zeroes of the response function
• Epistemically restricted phase space representation, weak momentum value, and reconstruction of quantum wave function
• Protective Measurement -- a new quantum measurement paradigm: detailed description of the first realisation
• Dimension-independent weak value estimation via controlled SWAP operations
• Interpreting weak value amplification with a toy realist model
• Optimal Settings For Amplification And Estimation Of Small Effects In Postselected Ensembles
• Sequential unsharp measurement of photon polarization
• Seeing opportunity in every difficulty: protecting information with weak value techniques
• Weak Particle Presence
• Teleportation of Post-Selected Quantum States
• Contextuality, Witness of Quantum Weirdness
• State distinguishability under weak measurement and post-selection: A unified system and device perspective
• No-go result for quantum postselection measurements of rank-m degenerate subspace
• Time-symmetry and topology of the Aharonov-Bohm effect
• Interplay between strong and weak measurement: Comparison of three experimental approaches to weak value estimation
• Nonclassical correlations in decaying systems
• Generalised Geometric Phase
• How weak values illuminate the role of "hidden"-variables as predictive tools
• Characterizing entangled state update in different reference frames with weak measurements
• The Informational Observer in Relational Quantum Mechanics
• Improving the Precision of Optical Metrology by Detecting Fewer Photons