Causal asymmetry in a quantum world

Causal asymmetry is one of the great surprises in predictive modeling: The memory required to predict the future differs from the memory required to retrodict the past. There is a privileged temporal direction for modeling a stochastic process where memory costs are minimal. Models operating in the...

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Main Authors: Thompson, Jayne, Garner, Andrew J. P., Mahoney, John R., Crutchfield, James P., Vedral, Vlatko, Gu, Mile
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2018
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Online Access:https://hdl.handle.net/10356/88412
http://hdl.handle.net/10220/45747
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-884122023-02-28T19:35:15Z Causal asymmetry in a quantum world Thompson, Jayne Garner, Andrew J. P. Mahoney, John R. Crutchfield, James P. Vedral, Vlatko Gu, Mile School of Physical and Mathematical Sciences Complexity Institute Quantum Physics Quantum Information DRNTU::Science::Physics Causal asymmetry is one of the great surprises in predictive modeling: The memory required to predict the future differs from the memory required to retrodict the past. There is a privileged temporal direction for modeling a stochastic process where memory costs are minimal. Models operating in the other direction incur an unavoidable memory overhead. Here, we show that this overhead can vanish when quantum models are allowed. Quantum models forced to run in the less-natural temporal direction not only surpass their optimal classical counterparts but also any classical model running in reverse time. This holds even when the memory overhead is unbounded, resulting in quantum models with unbounded memory advantage. 2018-08-29T09:00:49Z 2019-12-06T17:02:46Z 2018-08-29T09:00:49Z 2019-12-06T17:02:46Z 2018 Journal Article Thompson, J., Garner, A. J., Mahoney, J. R., Crutchfield, J. P., Vedral, V., & Gu, M. (2018). Causal Asymmetry in a Quantum World. Physical Review X, 8(3), 031013-. doi:10.1103/PhysRevX.8.031013 https://hdl.handle.net/10356/88412 http://hdl.handle.net/10220/45747 10.1103/PhysRevX.8.031013 en Physical Review X © 2018 The Author(s) (American Physical Society). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. 15 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Quantum Physics
Quantum Information
DRNTU::Science::Physics
spellingShingle Quantum Physics
Quantum Information
DRNTU::Science::Physics
Thompson, Jayne
Garner, Andrew J. P.
Mahoney, John R.
Crutchfield, James P.
Vedral, Vlatko
Gu, Mile
Causal asymmetry in a quantum world
description Causal asymmetry is one of the great surprises in predictive modeling: The memory required to predict the future differs from the memory required to retrodict the past. There is a privileged temporal direction for modeling a stochastic process where memory costs are minimal. Models operating in the other direction incur an unavoidable memory overhead. Here, we show that this overhead can vanish when quantum models are allowed. Quantum models forced to run in the less-natural temporal direction not only surpass their optimal classical counterparts but also any classical model running in reverse time. This holds even when the memory overhead is unbounded, resulting in quantum models with unbounded memory advantage.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Thompson, Jayne
Garner, Andrew J. P.
Mahoney, John R.
Crutchfield, James P.
Vedral, Vlatko
Gu, Mile
format Article
author Thompson, Jayne
Garner, Andrew J. P.
Mahoney, John R.
Crutchfield, James P.
Vedral, Vlatko
Gu, Mile
author_sort Thompson, Jayne
title Causal asymmetry in a quantum world
title_short Causal asymmetry in a quantum world
title_full Causal asymmetry in a quantum world
title_fullStr Causal asymmetry in a quantum world
title_full_unstemmed Causal asymmetry in a quantum world
title_sort causal asymmetry in a quantum world
publishDate 2018
url https://hdl.handle.net/10356/88412
http://hdl.handle.net/10220/45747
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