Imperial College London
Alternate

Professor Halliwell

Faculty of Natural Sciences, Department of Physics

Professor in Theoretical Physics
 
 
 
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Contact

 

+44 (0)20 7594 7831j.halliwell

 
 
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Assistant

 

Mrs Graziela De Nadai-Sowrey +44 (0)20 7594 7843

 
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Location

 

521Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Halliwell:2019:10.1103/PhysRevA.99.022119,
author = {Halliwell, JJ},
doi = {10.1103/PhysRevA.99.022119},
journal = {Physical Review A},
title = {Leggett-Garg tests of macrorealism: checks for noninvasiveness and generalizations to higher-order correlators},
url = {http://dx.doi.org/10.1103/PhysRevA.99.022119},
volume = {99},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - In the tests for macrorealism proposed by Leggett and Garg, the temporal correlation functions of a dichotomic variable Q must be measured in a noninvasive way to rule out alternative classical explanations of Leggett-Garg inequality violations. Ideal negative measurements in which a null result is argued to be a noninvasive determination of the system's state are often used. From a quantum-mechanical perspective, such a measurement collapses the wave function and will therefore typically be found to be invasive under any experimental check. Here, a simple modified ideal negative measurement protocol is described for measuring the correlation functions, which is argued to be noninvasive from both classical and quantum perspectives and hence the noninvasiveness can then be checked experimentally, thereby permitting a quantitative measure of the degree of clumsiness of the measurement. It is also shown how this procedure may be extended to measure higher-order correlation functions, and a number of higher-order conditions for macrorealism are derived.
AU  - Halliwell,JJ
DO  - 10.1103/PhysRevA.99.022119
PY  - 2019///
SN  - 1050-2947
TI  - Leggett-Garg tests of macrorealism: checks for noninvasiveness and generalizations to higher-order correlators
T2  - Physical Review A
UR  - http://dx.doi.org/10.1103/PhysRevA.99.022119
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000459199600004&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/68578
VL  - 99
ER  -
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