| Speaker: | J. Richard Bond (Canadian Institute for Theoretical Astrophysics, University of Toronto) |
|---|---|
| Title: | Entropy in a Coherent Universe: Quantum Information Flows in the Cosmic SuperWeb |
| Date (JST): | Mon, Nov 18, 2024, 15:30 - 16:30 |
| Place: | Lecture Hall |
| Abstract: |
von Neumann of (thermal) quantum entropy fame purportedly responded to Shannon asking what his novel classical information content measure should be called: paraphrasing, entropy, nobody understands it anyway. Nowadays thermal entropy, gravitational entropy and information entropy have merged as ideas, and expanded to encompass phase info as well as counting info, into quantum information aka quantum cosmology. Entropic development and transport through all of the great cosmic epochs of instability accompanying transitions of phase is a unifying story of the Universe. Tis a big topic which I will meander through, from the emergence of coherence, through inflation. its end in the matter-entropy burst, cosmic neutrino background decoupling, cosmic photon decoupling, and entropy development and transport in the gravitationally-unstable nonlinear cosmic web, leading to black holes. With applications to observable entropic relics, such as CnuB, CMB, CIB, etc. One quest is for information-laden Planck-epoch intermittent non-Gaussianities, pinGs, which could generate anomalous collapse on any and all scales, e.g., with possible implications for enhanced early black hole production. ********************************************* Prof. Bond received his bachelor's degree in 1973 from the University of Toronto and his PhD in theoretical physics in 1979 from Caltech under the supervision of William A. Fowler. He has been a professor at the Canadian Institute for Theoretical Astrophysics (CITA) and at the University of Toronto since 1985. His most famous work concerns the theoretical modeling of anisotropies of the cosmic microwave background. He is also an author of the peaks theory paper, known as BBKS, that made a strong impact on theory of the large scale structure formation. Furthermore, he is one of the first who systematically formulated the separate universe approach, which is now frequently used in cosmology. |
| Remarks: | This seminar is held as one component of a workshop, Probing the Genesis of Supermassive Black Holes: Emerging Perspectives from JWST and Expectation toward New Wide-Field Survey Observations. |
