The sense in which a weak measurement of a spin-1/2 particle's spin component yields a value 100

We give a critical discussion of a recent Letter of Aharonov, Albert, and Vaidman. Although their work contains several flaws, their main point is valid: namely, that there is a sense in which a certain weak measurement'' procedure yields values outside the eigenvalue spectrum. Our analysi...

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Bibliographic Details
Published in:Physical review. D, Particles and fields Particles and fields, 1989-09, Vol.40 (6), p.2112-2117
Main Authors: DUCK, I. M, STEVENSON, P. M, SUDARSHAN, E. C. G
Format: Article
Language:English
Subjects:
657002 - Theoretical & Mathematical Physics- Classical & Quantum Mechanics
ANGULAR MOMENTUM
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Classical and quantum physics: mechanics and fields
COUPLING
EIGENVALUES
Exact sciences and technology
FOURIER TRANSFORMATION
FUNCTIONS
HAMILTONIANS
INTEGRAL TRANSFORMATIONS
INTERACTIONS
MATHEMATICAL OPERATORS
MECHANICS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
Physics
QUANTUM MECHANICS
QUANTUM OPERATORS
SPIN
Theory of quantized fields
TRANSFORMATIONS
WAVE FUNCTIONS
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Summary:We give a critical discussion of a recent Letter of Aharonov, Albert, and Vaidman. Although their work contains several flaws, their main point is valid: namely, that there is a sense in which a certain weak measurement'' procedure yields values outside the eigenvalue spectrum. Our analysis requires no approximations and helps to clarify the physics behind the effect. We describe an optical analog of the experiment and discuss the conditions necessary to realize the effect experimentally.
ISSN:0556-2821
1089-4918
DOI:10.1103/PhysRevD.40.2112