¾ÅÐãÖ±²¥

Paul Charbonneau
Département de Physique, Université de Montréal

Abstract

A snowflake, a lichen, and a solar flare; my first is a crystal whose structure is set by molecular interactions at the nanometer scale; my second is a symbiotic biological organism of centimeter scale shaped by strong physical constraints; my third is an energy release event occurring in a magnetohydrodynamical system of scales reaching a million kilometers. What could these three systems possibly have in common ? In this talk I will discuss a physical modelling paradigm whereby such natural complex systems and phenomena emerge from a great many simple dynamical elements interacting locally with one another at scales much smaller than the global scale of the system. Complexity thus emerges from simplicity! However this cannot be viewed as a disguised form of reductionism, because here even perfect knowledge of microscopic dynamics cannot be used to predict macroscopic behaviour, as it does in statistical thermodynamics.

Join Zoom Meeting

Meeting ID: 954 1886 5289
Passcode: HL!6d3
One tap mobile
+14388097799,,95418865289#,,,,,,0#,,560887# Canada
+15873281099,,95418865289#,,,,,,0#,,560887# Canada

Dial by your location
        +1 438 809 7799 Canada
        +1 587 328 1099 Canada
        +1 613 209 3054 Canada
        +1 647 374 4685 Canada
        +1 647 558 0588 Canada
        +1 778 907 2071 Canada
        +1 204 272 7920 Canada
        +1 470 250 9358 US (Atlanta)
        +1 470 381 2552 US (Atlanta)
        +1 602 753 0140 US (Phoenix)
        +1 646 518 9805 US (New York)
        +1 651 372 8299 US (St. Paul)
        +1 669 219 2599 US (San Jose)
        +1 669 900 6833 US (San Jose)
        +1 720 928 9299 US (Denver)
        +1 786 635 1003 US (Miami)
        +1 929 436 2866 US (New York)
        +1 971 247 1195 US (Portland)
        +1 206 337 9723 US (Seattle)
        +1 213 338 8477 US (Los Angeles)
        +1 253 215 8782 US (Tacoma)
        +1 267 831 0333 US (Philadelphia)
        +1 301 715 8592 US (Germantown)
        +1 312 626 6799 US (Chicago)
        +1 346 248 7799 US (Houston)
Meeting ID: 954 1886 5289
Passcode: 560887
Find your local number: 

Join by SIP
95418865289@zoomcrc.com

Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia)
64.211.144.160 (Brazil)
69.174.57.160 (Canada)
207.226.132.110 (Japan)
Meeting ID: 954 1886 5289
Passcode: 560887