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- Xref: sparky sci.physics:22212 alt.sci.physics.new-theories:2706
- Newsgroups: sci.physics,alt.sci.physics.new-theories
- Path: sparky!uunet!well!sarfatti
- From: sarfatti@well.sf.ca.us (Jack Sarfatti)
- Subject: Wavelets, coherent states and complex spacetimes.
- Message-ID: <C0H91E.1Ko@well.sf.ca.us>
- Sender: news@well.sf.ca.us
- Organization: Whole Earth 'Lectronic Link
- Date: Thu, 7 Jan 1993 09:29:38 GMT
- Lines: 54
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- Wavelets, coherent states and complex spacetimes 1
- quotes from Gerald Kaiser's Quantum Physics, Relativity and Complex
- Spacetime, North Holland 1990
-
- "...complex spacetime as a unification of spacetime and classical phase
- space ... relativistic coherent states ... tube domains in axiomatic
- quantum field theory ... result from analytic continuation of .. vacuum
- expectation values ... to complex spacetime .... these tube domains ....
- have a direct physical interpretation as extended classical phase spaces
- .... relativistic coherent states are similar to wavelets .... coherent
- states and time-frequency localization ... windowed Fourier transforms and
- wavelet transforms ... frames ... discrete and continuous resolutions of
- unity ... reproducing kernel .. orthonormal bases of wavelets ...complex
- structure explains symmetry between the low and the high frequency filters
- in wavelet theory ... complex wavelet decompositions ... are analogous to
- analytic coherent state representations ... generalized coherent states
- based on Lie groups and their homogeneous spaces ... holomorphic (analytic)
- coherent-state representations .. result from .. Lie group
- complexification. The rotation group ... 'spin coherent states' ... the
- group associated with the harmonic oscillator is a weak contraction limit
- (as the spin s-> infinity) of the rotation group... the canonical coherent
- states are limits of the spin coherent states .... relativistic coherent
- state representations admit a covariant probabilistic interpretation ..
- absent in usual spacetime theories. In the non-relativistic limit they
- contract smoothly to representations of the Galilean group .. The Gaussian
- weight functions of the canonical coherent state representations emerge
- from the geometry of the mass hyperbolid ... Analytic-Signal Transform ..
- applied to an arbitrary function on R^n to give a function on C^n .. is
- 'analyticity-friendly'...even the most general fields satisfying the
- Wightman axioms generate a complexification of spacetime which may be
- interpreted as an extended classical phase space for certain special states
- ... The analytic Wightman two-point functions play the role of reproducing
- kernels,, Complex spacetime densities of observables such as energy,
- momentum, angular momentum and charge current are ... regularizations of
- their counterparts in real spacetime.. Dirac particles do not undergoe
- their usual zitterbewegung. The extension to complex spacetime separates ..
- the positive and negative frequency parts of free fields so Wick ordering
- becomes unnecessary. A functional integral representation ... for quantized
- fields ..combines the coherent-state representations for particle (finite
- number of degrees of freedom) with that for fields ..(infinite number ...)
- Whereas in real spacetime it is not possible to derive gauge potentials and
- gaughe fields from a fiber metric .. this can be done in complexspacetime
- .. the analogy between general relativity and Yang Mills gauge theory
- becomes much closer in complex spacetime than it is in real spacetime ...
- the relation between the non-abelian Yang-Mills field and it potential
- becomes linear due to the cancellation of the non-linear part ...
- generalizing the Analytic-Signal Transform ... is a higher dimensional
- version of the wavelet transform which is closely related to .. Hilbert,
- Fourier-Laplace and Radon transforms."
-
- to be continued
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