一种活塞结构的casimir效应.pdf

Casimir Forces: Overview and History
Casimir Forces: Basic Properties and Technical Relevance
Casimir Forces: Computations
Conclusion and Outlook
Advances in Casimir Force Calculations
Thomas Fischbacher
University of Southampton
Faculty of Engineering and the Environment

Thomas Fischbacher Advances in Casimir Force Calculations
Casimir Forces: Overview and History
Casimir Forces: Basic Properties and Technical Relevance
Casimir Forces: Computations
Conclusion and Outlook
Outline
1 Casimir Forces: Overview and History
2 Casimir Forces: Basic Properties and Technical Relevance
3 Casimir Forces: Computations
4 Conclusion and Outlook
Thomas Fischbacher Advances in Casimir Force Calculations
Casimir Forces: Overview and History
Casimir Forces: Basic Properties and Technical Relevance
Casimir Forces: Computations
Conclusion and Outlook
Casimir Forces: Overview and History
Quantum Electrodynamics predicts an (usually attractive)
force between neutral conductors.
Casimir's original (1948) calculation: Force per area between
parallel conducting plates at separation a with
~ωPlasma  ~c /a :
1 ~c 2
F A π(attractive)
/ = −240 a 4
Note that this is supercially independent of αQED !
Casimir's 1948 article: Explanation in terms of zero point
energy shift of the radiation eld.
Thomas Fischbacher Advances in Casimir Force Calculations
Casimir Forces: Overview and History
Casimir Forces: Basic Properties and Technical Relevance
Casimir Forces: Computations
Conclusion and Outlook
Casimir Forces: Overview and History
Earlier investigations by Casimir and Polder (also 1948):
neutral polarizable atom/molecule in front of perfectly
conducting plate.
Casimir Force may be regarded as a variant of Van der Waals
Force for extended conducting objects.
First quantum mechanical explanation of attractive force
between noble gas atoms: F. London (1930).
Thomas Fischbacher Advances in Casimir F