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The Universe - A Quest for Reality -

The Universe - A Quest for Reality -. By Nina Niermann, Julia Panczyk & Lisa Timmermann Emergent Complexity in Physics 17.12.2004. Table of Contents. A short History of Physics Newton

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The Universe - A Quest for Reality -

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  1. The Universe - A Quest for Reality - By Nina Niermann, Julia Panczyk & Lisa Timmermann Emergent Complexity in Physics 17.12.2004

  2. Table of Contents • A short History of Physics • Newton • Einstein • QM • prospective unified theories • Cosmology •  challenges of recent discoveries • concluding thoughts

  3. Milestones in Physics • Sir Isaac Newton (1642-1727) • universal gravitation • laws of motion • groudwork for classical mechanics • Albert Einstein (1879-1955) • special relativity • general relativity • photoelectric effect • Quantum Mechanics • quantization • particle-wave duality

  4. The Standard Model Categorized according to mass: • Leptons • Mesons • Baryons Categorized according to spin: • Bosons • Fermions Hadrons  Quarks

  5. deals with particles • assumes fixed spacetime (special coordinates) • gravity caused by gravitons • quantized energy • includes standard model micro scale • dynamic spacetime • no objective frame of reference (independent coordinates) • gravity = curved spacetime • time slower in gravity field macro scale Confrontation of Two Successful Theories Quantum Field Theory General Relativity

  6. GUTS and TOES 2 prominent attempts of solving the problem: • String Theory • Loop Quantum Gravity  Unificatie

  7. „Its incompleteness is strength as well as weakness of the theory“ String Theory A link between macro and micro • string = single elementary • building block • particle types = different • vibrational modes • purely mathematical

  8. 100 Years of Progress • individual versus collective • quantum mechanics & string theory: results of collaboration  new media: reaction to reaction to reaction... • interdisciplinary cooperation

  9. The Modern Universe • Fast-paced progression in cosmology • Striking developments:  cosmic background radiation (WMAP)  dark matter  dark energy  expansion of the universe  acceleration of expansion Good for you...

  10. Dynamic Universe • Einstein: static universe  introduction of cosmological constant • detection of redshift  expansion • acceleration

  11. Cosmic Background Radiation • accidentally detected in 1960s • radiation from era of recombination • WMAP produces image of CBR (2003) • density fluctuation

  12. Dark Matter & Dark Energy • hints for existance:  cosmic background radiation  critical mass density • 2-5 % luminous matter • ~ 25 % dark matter • ~ 70 % dark energy • prominent candidate for dark matter: neutralino • candidates for dark energy: vacuum energy, cosmological constant

  13. Dijkgraafian Thoughts • challenges to string theory:  create complete picture  incorporation and prediction of new discoveries  Large Hadron Collider • modern research: no one way street • derivation of spacetime • „It‘s all about asking questions!“

  14. Any questions...... from the experts?

  15. May the Force be with you... Nina Niermann Julia Panczyk Lisa Timmermann Special Thanks to: Prof. Robbert Dijkgraaf Prof. Ronald Westra

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