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michael_nielsen's profile
michael_nielsen
michael_nielsen
michael_nielsen
@michael_nielsen

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michael_nielsen

@michael_nielsen

Searching for the numinous. Co-purveyor of https://quantum.country/ 

San Francisco, CA
michaelnielsen.org
Joined July 2008

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    1. michael_nielsen‏ @michael_nielsen 19 Sep 2018
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      Some rough working notes, me thinking out loud: "The varieties of material existence": http://cognitivemedium.com/vme pic.twitter.com/g66P85yiVZ

      7 replies 13 retweets 61 likes
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    2. michael_nielsen‏ @michael_nielsen 19 Sep 2018
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      It's really rather remarkable the variety of things we can build with protons, electrons and neutrons (brains, black holes, living cells, neutron stars, universal computers, etc). What new types of matter haven't yet been conceived?pic.twitter.com/YeVbJL0MQy

      5 replies 4 retweets 22 likes
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    3. michael_nielsen‏ @michael_nielsen 19 Sep 2018
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      I'm curious about the extent to which multiple fields are conceiving of new states of matter at the moment, especially by the current flux in how physicists think about what a phase of matter ispic.twitter.com/spKOis4MVa

      3 replies 1 retweet 9 likes
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    4. michael_nielsen‏ @michael_nielsen 19 Sep 2018
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      I realized, somewhat to my chagrin, that I didn't have a very good answer to the question "what phase of matter are living systems"? Thinking this through, they're a hybrid: many components are liquids or solids; many important components are far from equilibrium; &

      5 replies 0 retweets 5 likes
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      michael_nielsen‏ @michael_nielsen 19 Sep 2018
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      they contain amazing systems which are designed to keep them away from equilibrium.pic.twitter.com/5S3qXQqrUS

      9:39 PM - 19 Sep 2018
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      • 8 Likes
      • Marcos Pereira Nicholas Frota Sean Bailly Karen Kommerce Nishant Suri Gabriel U. The Trouble With Economics R F Latta
      4 replies 2 retweets 8 likes
        1. New conversation
        2. michael_nielsen‏ @michael_nielsen 19 Sep 2018
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          On physics as a design science. One of my favourite distinctions is Herb Simon's distinction between sciences of the natural & sciences of the artificial. I wonder if physics might actually transition from one to the other?pic.twitter.com/Cim23RdVAo

          2 replies 5 retweets 16 likes
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        3. michael_nielsen‏ @michael_nielsen 19 Sep 2018
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          Here's Simon's book on the distinction:https://www.amazon.com/Sciences-Artificial-Herbert-Simon/dp/0262691914/ref=sr_1_1?ie=UTF8&qid=1537418555&sr=8-1&keywords=herb+simon+artificial …

          1 reply 0 retweets 6 likes
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        4. michael_nielsen‏ @michael_nielsen 19 Sep 2018
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          And some speculation about whether the notion of fundamental particles even makes sense, since there are systems in which it's possible to give two equivalent descriptions in terms of entirely different sets of fundamental particles.pic.twitter.com/r2FsiRkrdS

          4 replies 1 retweet 10 likes
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        5. michael_nielsen‏ @michael_nielsen 19 Sep 2018
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          A particularly strong version of this might result in a point of view in which the fundamental particles and forces barely matter at all, and what really matters is notions like universality in computation, programmability, and some sufficiently broad notion of phases of matter.

          4 replies 0 retweets 13 likes
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        6. michael_nielsen‏ @michael_nielsen 19 Sep 2018
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          If you read this far, thanks for indulging my thinking aloud!

          4 replies 0 retweets 15 likes
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        7. End of conversation
        1. tubelite‏ @tubelite Jun 28
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          Replying to @michael_nielsen

          I found it useful to consider self-winding watches, which also contain neat systems designed to keep them away from equilibrium, given random motion. Thus, life as an extremely complex self-duplicating self-winding watch.

          0 replies 0 retweets 1 like
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        1. The Trouble With Economics‏ @troublewithecon 19 Sep 2018
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          Replying to @michael_nielsen

          The crucial distinction between homeostasis and equilibrium. The old phrase "equilibrium systems are dead" is a reminder of this delicate balance in biology. Interesting to consider the entropy and informational perspective of life via dissipation-driven adaptive organization.

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        1. Michael Harris‏ @mikeharrisNY 20 Sep 2018
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          Replying to @michael_nielsen

          It's not stable but quasi-stable. Large perturbations (injuries) cause permanent damage or death. Use of "stable" is BS.

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