Variational consistent histories as a hybrid algorithm for quantum foundations

Although quantum computers are predicted to have many commercial applications, less attention has been given to their potential for resolving foundational issues in quantum mechanics. Here we focus on quantum computers' utility for the Consistent Histories formalism, which has previously been e...

Full description

Bibliographic Details
Published in:Nature communications, Vol. 10, No. 1 (2019), p. 3438
Main Author: Arrasmith, Andrew
Other Involved Persons: Cincio, Lukasz ; Sornborger, Andrew T ; Zurek, Wojciech H ; Coles, Patrick J
Format: electronic Article
Language:English
ISSN:2041-1723
Item Description:Date Revised 23.09.2019
published: Electronic
Citation Status PubMed-not-MEDLINE
Copyright: From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Physical Description:Online-Ressource
DOI:10.1038/s41467-019-11417-0
Subjects:
QR Code: Show QR Code
LEADER 02330nma a2200385 c 4500
001 NLM300427476
003 DE-601
005 20191007021036.0
007 cr uuu---uuuuu
008 190805s2019 000 0 eng d
024 7 |a 10.1038/s41467-019-11417-0  |2 doi 
028 5 2 |a pubmed19n1496.xml 
035 |a (DE-599)NLM31366888 
040 |b ger  |c GBVCP 
041 0 |a eng 
100 1 |a Arrasmith, Andrew 
245 1 0 |a Variational consistent histories as a hybrid algorithm for quantum foundations  |h Elektronische Ressource 
300 |a Online-Ressource 
500 |a Date Revised 23.09.2019 
500 |a published: Electronic 
500 |a Citation Status PubMed-not-MEDLINE 
500 |a Copyright: From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine 
520 |a Although quantum computers are predicted to have many commercial applications, less attention has been given to their potential for resolving foundational issues in quantum mechanics. Here we focus on quantum computers' utility for the Consistent Histories formalism, which has previously been employed to study quantum cosmology, quantum paradoxes, and the quantum-to-classical transition. We present a variational hybrid quantum-classical algorithm for finding consistent histories, which should revitalize interest in this formalism by allowing classically impossible calculations to be performed. In our algorithm, the quantum computer evaluates the decoherence functional (with exponential speedup in both the number of qubits and the number of times in the history) and a classical optimizer adjusts the history parameters to improve consistency. We implement our algorithm on a cloud quantum computer to find consistent histories for a spin in a magnetic field and on a simulator to observe the emergence of classicality for a chiral molecule 
611 2 7 |a Journal Article  |2 gnd 
689 0 0 |A f  |a Journal Article 
689 0 |5 DE-601 
700 1 |a Cincio, Lukasz 
700 1 |a Sornborger, Andrew T 
700 1 |a Zurek, Wojciech H 
700 1 |a Coles, Patrick J 
773 0 8 |i in  |t Nature communications  |g Vol. 10, No. 1 (2019), p. 3438  |q 10:1<3438  |w (DE-601)NLM199281564  |x 2041-1723 
856 4 1 |u http://dx.doi.org/10.1038/s41467-019-11417-0  |3 Volltext 
912 |a GBV_NLM 
951 |a AR 
952 |d 10  |j 2019  |e 1  |c 07  |h 3438