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kozmoforum.hu Tudományos és ismeretterjesztő beszélgetések az Életről, a Világmindenségről, meg Mindenről. 2017-07-14T13:43:08+02:00 https://www.teszt.kozmoforum.hu/feed.php?f=19&t=338 2017-07-14T13:43:08+02:00 2017-07-14T13:43:08+02:00 https://www.teszt.kozmoforum.hu/viewtopic.php?t=338&p=12449#p12449 <![CDATA[Kvantum-klasszikus korrespondencia]]>
Ennek leírására többféle megközelítés is van, az operátorok időfejlődésére például:

-A Lindblad operátoros (markovi) megközelítésben:


ami a Fokker-Planck egyenlet általánosításának vehető.



-A sztochasztikus módszerek, melyek a Langevin-egyenlet általánosításának vehetőek.

Kép




Ezzel szemben a klasszikus mechanika kapcsolatát a kvantummechanikával nagyon sokszor a Poisson-zárójeles formalizmus és a Heisenberg-kép között szokták megtenni.


Kép
Matematikailag kétségtelenül van kapcsolat, de számomra messze nem nyilvánvaló hogy ez a matematikai kapcsolat bármi fizikai jelentéssel bír-e önmagában.

Látható hogy ha fizikailag a klasszikus világ felé közelítünk, vagyis a környezet hatását figyelembevesszük, akkor a matematikai analógia a klasszikus világgal gyengül.
Miért tekintik mégis a Heisenberg-kép --- Poisson zárójelek átmenetét alapvetőnek?

Statisztika: Elküldve Szerző: G.Á — 2017.07.14. 13:43

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