- Slides: 31
NKS Fundamental Physics
Breathing in Empty Space • . . . the introduction of a space-time continuum may be considered as contrary to nature in view of the molecular structure of everything which happens on a small scale.
Breathing in Empty Space • . . . perhaps the success of the Heisenberg method points to a purely algebraical method of description of nature, that is to the elimination of continuous functions from physics.
Then, however, we must also give up, by principle, the space-time continuum. It is not unimaginable that human ingenuity will some day find methods which will make it possible to proceed along such a path.
At the present time, however, such a program looks like an attempt to breathe in empty space.
--Albert Einstein, 1936
Theory of Everything Quantum Gravity Simplicity From http: //physicalworld. org/restless_univ
NKS: in Context, Online Which theories are being talked about? How do they handle Quantum Mechanics? How come the quantum? Talk or action? (Debate or Simulate? ) Who is talking? (Physics or Computer background? )
Wolfram, Fredkin Revolutionary (breathing in space!) Zuse, Fredkin, Petrov: bits, Turing machines, automata (0101011101) Wolfram: trivalent networks, choice of updating, causal structure Revolutionary Clockwork
Establishment: Superstrings Uses continuum physics Traditional Assumes quantum theory Planck length limit: string modes reverse Fuzzy Random
NKS: Trivalent Networks 0 1 1 0 1 (1) (0) General Relativity: Space is a Player!
NKS does GR Dimension, Curvature from Linkage
NKS Meets Quantum Randomness not needed (Rule 30) Describe world from within network EPR: particles created together are related when observed apart. NKS: from strands too small for photons Feynman histories from update freedom
Loop Quantum Gravity Spin networks Quantum mechanics Backgroundindependent Versions: constraints, spin foam Traditional origins but radical conclusions Fuzzy Random
Origins of LQG x c [(-1) ] (-2) n! x=intersections between strands c=number of closed loops n=spin of unit
Parallel Transport New “Connection” variable becomes “Operator”--Turns GR into Quantum!
3 3 4 3 2 2 1 2 2 3 1 2 2 1 1 1 2 Which network? Both! All! It’s a Quantum, Quantum 3
Spin Networks in LQG Area= 3 3 4 3 2 8 1 3 gh. G j(j+1)
Theories Meet Online Wolfram Forums Yahoo: Digital. Physics USEnet group: sci. physics. discre te Blogs / Journals
Physics vs. Comp. Sci. United States Degrees, Year 2000 National Science Foundation, Division of Science Resources Statistics Science and Engineering Degrees: 1966 -2000 Arlington, VA (NSF 02 -327) [July 2002]
Pro-Loop in Wolfram Forum
Thread: EPR and Events How to get EPR? S Reinventing wheel? (But making it discrete) Off-topic pet theories: distracting!
YAHOO! Groups: Digital. Physics
Usenet: sci. physics. discrete
Example Blog: Mine! Journal is often (not only) about science 112 readers, 3 interested in NKS physics Reinterpretations (not rules), multiway systems, what’s program? what’s data?
Why DEBATE not SIMULATE? Networks don’t look as cool Networks are harder to visualize Many ways to represent networks How to recognize a particle? Uncomfortable with basic ideas
NKS Physics Online More computer scientists than physicists More ready to debate than simulate networks How to treat “cranks” and “flame wars”? Blogs better for self-promotion Amateurs are meeting professionals Theories are compared and contrasted
Make everything as simple as possible, but not simpler” --Albert Einstein