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Paper Abstract and Keywords
Presentation 2023-05-30 15:20
Weak values and the past of a quantum particle
Jonte R Hance (Hiroshima Univ.; Univ. of Bristol), John G Rarity, James Ladyman (Univ. of Bristol)
Abstract (in Japanese) (See Japanese page) 
(in English) We present three issues with using a nonzero weak value of the spatial projection operator to infer the past path of an individual quantum particle. First, weak measurements disturb a system, so any approach relying on these perturbations describes the state of a disturbed system, not the hypothetical undisturbed system. Secondly, even assuming no disturbance, there is no reason to associate this non-zero weak value with the classical idea of `particle presence'. Finally, these weak value approaches provide no information beyond standard quantum mechanics. We know of no experiment with testable consequences demonstrating connection between particle presence and weak values.
Keyword (in Japanese) (See Japanese page) 
(in English) weak values / quantum foundations / past of a quantum particle / weak measurement / / / /  
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Conference Information
Committee QIT  
Conference Date 2023-05-29 - 2023-05-30 
Place (in Japanese) (See Japanese page) 
Place (in English) Katsura Campus, Kyoto University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Quantum Information 
Paper Information
Registration To QIT 
Conference Code 2023-05-QIT 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Weak values and the past of a quantum particle 
Sub Title (in English)  
Keyword(1) weak values  
Keyword(2) quantum foundations  
Keyword(3) past of a quantum particle  
Keyword(4) weak measurement  
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1st Author's Name Jonte R Hance  
1st Author's Affiliation Hiroshima University; University of Bristol (Hiroshima Univ.; Univ. of Bristol)
2nd Author's Name John G Rarity  
2nd Author's Affiliation University of Bristol (Univ. of Bristol)
3rd Author's Name James Ladyman  
3rd Author's Affiliation University of Bristol (Univ. of Bristol)
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Speaker Author-1 
Date Time 2023-05-30 15:20:00 
Presentation Time 15 minutes 
Registration for QIT 
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