Virtual and Actual Events

• VIRTUAL EVENTS

  • Point events
    • (not=point measurements)
  • Interactions
  • Microscopic interactions
  • Continuous
  • Deterministic (apparently)
  • Contribute to alternate futures
  • Have intrinsic group structure (e.g. gauge invariance, renormalisation)

• ACTUAL EVENTS

  • Visible events in history
    • (e.g. measurement)
  • Selections
  • Macroscopic decoherence
  • Discrete
  • Probabilistic
  • Definitely occur (or not)
  • Have branching tree structure

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