H. Dieter Zeh (Prof. em.)

D69151 Waldhilsbach – Germany

"Man can retire, but man can never stop thinking …" (Ben Liang Li)


A Frog's Bird's View

This website offers a list of selected publications (in descending chronological order), most of them with links to electronic versions, and some unpublished "web essays" or preprints for download.
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Note that the versions of some early papers offered on this website (including those available from the arXiv) may be draft versions or preprints. Some others are revised versions of their printed originals (compare their dates!).

If you send me a message via "Contact", please provide links to any papers that you want to refer to. I will not generally reveal my email address in order to receive them. I also cannot endorse authors or papers which I do not know (and I cannot check or discuss all manuscripts I receive).

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Quote from page 24 of my “Strange story of particles and waves“ (see Quantum Theory):
If the global quantum state does indeed always obey unitary dynamics, the observed quantum indeterminism can clearly not represent any objective dynamical law. In the Everett interpretation it is in principle a “subjective” phenomenon that instead reflects the (then required) branching histories of all conceivable observers into many different versions (with their “many minds”). This may explain Heisenberg’s interpretation of quantum measurements as requiring “human” observers. … All measurement outcomes are thereby objectivized by the correlation between those versions of different observers (including Wigner’s friend or Schrödinger’s cat) who exist in the same Everett branch, and thus can communicate. For all practical purposes, their entanglement with the apparatus after reading it, and with the environment, also justifies Bohr’s interpretation of measurements (unlike Heisenberg’s) in terms of classical outcomes that would be irreversibly and objectively created (in apparent events) by the macroscopic apparatus. This macroscopic entanglement (in addition to decoherence) explains the traditional concept of a “classical reality”: only a documented phenomenon is a phenomenon.