1. You have your name in a bra and ket 2. I was unaware anyone else liked Wick Rots 3. You’re therefore qualified for free lunch anytime you’re near our lab in Pasadena.
Following up on @SamuelGWalters wonderful post on Wick Rotations.
A Wick Rotation is an integral substitution that maps the 4-momentum time component p⁰ to the imaginary axis ipₑ
pₑ is the "Euclidian 4 momentum"
The LHS has a causal structure, the RHS does notpic.twitter.com/ZVjxZwUVpN
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Also, non physics geeks: this goofy guy was Giancarlo Wick. He had a deep insight into the relationship between probability and “classical” reality and found some clever clever ways to trade dimensions with things like temperature to explain complicated systems. Cool guy.pic.twitter.com/ddiPkBG5Ph
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Hawking: wave function of universe with no matter but Dark Energy, oscillates in de-Sitter metric can be put in from of Friedman universe with scale factor coshHt. Going to imaginary time cosh goes to cos giving Euclidean metric on four sphere with radius 1/H decays exp.
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That’s a beautiful fact
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