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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. Matthew Cory‏ @TricksterDoesIt Nov 3
      • Report Tweet

      Matthew Cory Retweeted michael_nielsen

      Ask Emmy Noether.https://twitter.com/michael_nielsen/status/1191085975574728705 …

      Matthew Cory added,

      michael_nielsen @michael_nielsen
      On the oddly pervasive notion of the conservation of energy pic.twitter.com/j0iWw1sbTY
      Show this thread
      1 reply 0 retweets 0 likes
    2. michael_nielsen‏ @michael_nielsen Nov 3
      • Report Tweet
      Replying to @TricksterDoesIt

      michael_nielsen Retweeted michael_nielsen

      https://twitter.com/michael_nielsen/status/1191173191818870784 …

      michael_nielsen added,

      michael_nielsen @michael_nielsen
      Another topic: some people are replying "Isn't this Noether's theorem?" But that misses the the point. Of course, once you're in Lagrangian mechanics & have time-translation invariance, conservation follows. And there's an analogous quantum argument...
      Show this thread
      1 reply 0 retweets 0 likes
      michael_nielsen‏ @michael_nielsen Nov 3
      • Report Tweet
      Replying to @michael_nielsen @TricksterDoesIt

      michael_nielsen Retweeted Matthew Cory

      Can you provide a reference for this statement, that doesn't assume some prior structure (Lagrangian mechanics, unitary evolution in a Hilbert space, etc)?https://twitter.com/TricksterDoesIt/status/1191179505991376896 …

      michael_nielsen added,

      Matthew Cory @TricksterDoesIt
      Replying to @michael_nielsen
      Symmetries in NATURE lead directly to conservation laws.
      6:27 PM - 3 Nov 2019
      1 reply 0 retweets 0 likes
        1. New conversation
        1. Matthew Cory‏ @TricksterDoesIt Nov 3
          • Report Tweet
          Replying to @michael_nielsen

          For example: https://www.asc.ohio-state.edu/gan.1/teaching/winter10/Chapter4.pdf …

          1 reply 0 retweets 0 likes
        2. michael_nielsen‏ @michael_nielsen Nov 3
          • Report Tweet
          Replying to @TricksterDoesIt

          Those examples all appear to assume Lagrangian mechanics, or unitary evolution under some Hamiltonian.

          1 reply 0 retweets 0 likes
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