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If you are aware of an interesting new academic paper (that has been published in a peer-reviewed journal or has appeared on the arXiv), a conference talk (at an official professional scientific meeting), an external blog post (by a professional scientist) or a news item (in the mainstream news media), which you think might make an interesting topic for an FQXi blog post, then please contact us at forums@fqxi.org with a link to the original source and a sentence about why you think that the work is worthy of discussion. Please note that we receive many such suggestions and while we endeavour to respond to them, we may not be able to reply to all suggestions.

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RECENT FORUM POSTS

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RECENT ARTICLES
click titles to read articles

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'Artificial atoms' allow physicists to manipulate individual electrons—and could help to reduce energy wastage in electronic devices.


FQXi BLOGS
September 29, 2021

New Blog Entries
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The universe as a quantum many-body system by Daniele Oriti
By DANIELE ORITI • Sep. 21, 2021 @ 21:35 GMT

The universe as a quantum many-body system

Speaker: Daniele Oriti | LMU München & MCQST



Abstract

Several approaches to quantum gravity suggest that spacetime and geometry are emergent from non-spatiotemporal quantum structures. In some of them, the fundamental quantum entities admit (in some approximation) a simplicial geometric description and can be mapped to generalized tensor networks. This allows also for a primitive entanglement/geometry correspondence. I summarize this formulation of the universe as a quantum many-body system, these immediate consequences as well as more recent results about holographic behavior. Then, I suggest possible lines of further developments from this perspective. Finally, I discuss how the hydrodynamic description of the same system, treated as a quantum fluid, can be given a cosmological interpretation and present a number of recent results about the resulting effective cosmological dynamics, including the replacement of the big bang singularity with a quantum bounce and a late-time accelerated behavior reproducing a phantom-like dark energy from pure quantum gravity origin.



Keywords: #quantum #gravity
1 comment | view comments


Relationship between no-fine-tuning and Bell-KS inequalities by Eric G Cavalcanti
By ERIC G. CAVALCANTI • Sep. 21, 2021 @ 21:30 GMT

Talk given at QCQMB workshop in May 2021



Keywords: #quantum #nonlocality #Bell #foundations
0 comments


Views, variety and the quantum by Lee Smolin
By LEE SMOLIN • Sep. 21, 2021 @ 21:28 GMT

International Conference on Advances in Pilot Wave Theory & HQA-2021

26-30 July 2021, online



Lee Smolin (Perimeter Institute for Theoretical Physics, Canada)

"Views, variety and the quantum"



Keywords: #consciousness #quantum #views
1 comment | view comments


On the repeatable use of quantum resources in thermodynamics by Markus Müller
By MARKUS P MUELLER • Sep. 21, 2021 @ 20:09 GMT

Online NITheP Workshop Quantum Thermodynamics

(23-27 November 2020)



26 November 2020



Markus P. Muller

(Institute for Quantum Optics and Quantum Information, Vienna)

On the repeatable use of quantum resources in thermodynamics



Keywords: #quantum #thermodynamics #resources
0 comments


Topological Quantum Error Correction: From Theoretical Concepts to Experiments by Markus Müller
By MARKUS P MUELLER • Sep. 21, 2021 @ 20:07 GMT

Seminar presented by Markus Müller on the 29th of April, 2021, within the IFIMAC+ICMM Seminar Series.



Keywords: #quantum #error #correction #information
0 comments

Recent Blog Entries

The Room in the Elephant: From Undecidability as...
By MARKUS P MUELLER
Talk by Markus Müller (Institute for Quantum Optics and Quantum Information)

Mini-Workshop Website: https://harvardfop.jacobbarandes.com/...

YouTube Channel: https://www.youtube.com/channel/UCPRe...

Harvard Foundations of...
September 21st, 2021 | 8 comments | view blog entry & comments

Consciousness and the Collapse of the Wave...
By DAVID CHALMERS
Talk by David Chalmers (New York University), Kelvin McQueen (Chapman University)

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YouTube Channel: https://www.youtube.com/channel/UCPRe...

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September 21st, 2021 | 6 comments | view blog entry & comments

Quantum heat transport by microwave photons by...
By JUKKA PEKOLA
Recorded as part of the Transport and Efficient Energy Conversion in Quantum Systems Conference at KITP.



Several communities of experimental and theoretical physics are devoted to studying the problem of transport and energy...
September 21st, 2021 | -1 comments | view blog entry & comments

The Thermodynamics of Clocks by Gerard Milburn
By GERARD JAMES MILBURN
All clocks, periodic and non-periodic, are open dissipative systems driven from thermal equilibrium so that the Helmholtz free energy is increased. In this talk Gerard Milburn discusses the thermodynamic constraints for classical and quantum clocks....
September 21st, 2021 | -1 comments | view blog entry & comments

Quantum impulse control by Christopher Jarzynski
By CHRISTOPHER JARZYNSKI
Recorded as part of the Transport and Efficient Energy Conversion in Quantum Systems Conference at KITP.



Keywords: #iaf #quantum #devices #control
September 21st, 2021 | -1 comments | view blog entry & comments

Energy Gaps and Quantum Devices in Twisted...
By KLAUS ENSSLIN
Talk from the Center for Integrated Quantum Materials.



Keywords: #iaf #quantum #devices #graphene
September 21st, 2021 | -1 comments | view blog entry & comments

Object-based vs Relation-based Ontologies in the...
By ALEXIA AUFFEVES
Alexia Auffèves (Institut Néel) - Object-based vs Relation-based Ontologies in the Quantum World; or, Relational Quantum Mechanics vs Contextual Objectivity



Friday, 25th June 2021



Keywords: #iaf #quantum ...
September 21st, 2021 | -1 comments | view blog entry & comments

Out of equilibrium quantum systems by Jorg...
By JöRG SCHMIEDMAYER
ICAP - Out of equilibrium quantum systems, higher-order correlations and what we can learn about the solution for many body problems from experiments



Keywords: #iaf #experimental #quantum #thermodynamics
September 21st, 2021 | -1 comments | view blog entry & comments

What atomtronics experiments teach us about many...
By JöRG SCHMIEDMAYER
Jörg Schmiedmayer - Technological University of Wien



Talk Topic: What atomtronics experiments teach us about many body physics and what this means for integrated matter wave circuits



Keywords: #iaf #quantum ...
September 21st, 2021 | -1 comments | view blog entry & comments


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