Search FQXi


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.

Please also note that we do not accept unsolicited posts and we cannot review, or open new threads for, unsolicited articles or papers. Requests to review or post such materials will not be answered. If you have your own novel physics theory or model, which you would like to post for further discussion among then FQXi community, then please add them directly to the "Alternative Models of Reality" thread, or to the "Alternative Models of Cosmology" thread. Thank you.

Forum Home
Introduction
Terms of Use

Order posts by:
 chronological order
 most recent first

Posts by the blogger are highlighted in orange; posts by FQXi Members are highlighted in blue.

By using the FQXi Forum, you acknowledge reading and agree to abide by the Terms of Use

 RSS feed | RSS help
RECENT POSTS IN THIS TOPIC

Josh Hoffman: on 3/24/22 at 23:54pm UTC, wrote With Carlo Rovelli, Theoretical Physicist, Director of the Quantum Gravity...


RECENT FORUM POSTS

Steve Dufourny: "In reading the paper of Maudlin quietly, I have ideas , The aim is to..." in The Noise of Gravitons

Steve Dufourny: "The equation that I have writen here is intuitive and needs probably some..." in The Noise of Gravitons

Steve Dufourny: "A kind of strategy is necessary to create all these solutions.FQXi could..." in Global Collaboration

Steve Dufourny: "This project Global collaboration here on FQXi is possible, we could name..." in Global Collaboration

Steve Dufourny: "stop this please, FQXi is well moderated , so don t insist" in George Ellis - How can...

Martin Gray: "What are the different skin conditions that people often face? Every skin..." in George Ellis - How can...

Steve Dufourny: "Jonathan Dickau ,hope you are well, always cool to have your points of vue,..." in 16th Marcel Grossmann...

Steve Dufourny: "This platform is about theoretical physics, it is irritating to have these..." in 16th Marcel Grossmann...


RECENT ARTICLES
click titles to read articles

The Math of Consciousness: Q&A with Kobi Kremnitzer
A meditating mathematician is developing a theory of conscious experience to help understand the boundary between the quantum and classical world.

Can We Feel What It’s Like to Be Quantum?
Underground experiments in the heart of the Italian mountains are testing the links between consciousness and collapse theories of quantum physics.

The Thermodynamic Limits of Intelligence: Q&A with David Wolpert
Calculating the energy needed to acquire and compute information could help explain the (in)efficiency of human brains and guide the search for extra-terrestrial intelligence.

Gambling Against the Second Law
Using precision thermometry to make mini heat engines, that might, momentarily, bust through the thermodynamic limit.

Mind and Machine: What Does It Mean to Be Sentient?
Using neural networks to test definitions of 'autonomy.'


FQXi BLOGS
July 7, 2022

CATEGORY: Blog [back]
TOPIC: What is a ‘Cause,’ and Why Does it Happen Before the Effect? Carlo Rovelli by Carlo Rovelli [refresh]
Bookmark and Share
Login or create account to post reply or comment.

FQXi Administrator Josh Hoffman wrote on Mar. 24, 2022 @ 23:54 GMT
With Carlo Rovelli, Theoretical Physicist, Director of the Quantum Gravity Group.

The physics of the time orientation of causation is more subtle than what it looks like superficially. For a long while, it was reduced to a mere linguistic issue (a “cause” is just the term of a correlation that happens earlier, per Hume). As emphasized by Russell, there is no time orientation in fundamental physics. But causation was later better understood as an essential notion in the context of an agent having choices, which after all is our own common context. This traces the time orientation of causation to the time orientation of agency. This realization has been used by Nancy Cartwright to argue for the incompleteness of fundamental physics. However, agents are, in turn, physical systems and they must derive their time orientation from physics. Does this bring us back to square one? Remarkably, the answer is no because agency is a macroscopic notion and macroscopic physics is, contingently, time oriented, in a way compatible with the fundamental absence of an arrow of time. Hence the time orientation is causation is a consequence of the thermodynamic arrow of time, but in a peculiarly indirect way, that goes through the physical nature of the agents with respect to which causation is meaningful.



Keywords: #agency #Rovelli #Thermodynamics #Quantum

Bookmark and Share


This forum thread is open to the public.


Login or create account to post reply or comment.

Please enter your e-mail address:
Note: Joining the FQXi mailing list does not give you a login account or constitute membership in the organization.