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Dear All,

SOLID STATE & STRUCTURAL CHEMISTRY UNIT

INDIAN INSTITUTE OF SCIENCE

BANGALORE – 560 012

SEMINAR

Speaker: Mr. Shubhadeep Nag

Effect of Vacuum Fluctuation : Casimir Force

Title

Date & Time: Thursday 19th April, 2018 at 4.00 PM

Venue: SSCU AUDITORIUM

Abstract:
In 1948, Hendrik B.G. Casimir and D. Polder calculated the retardation effect of van der waals forces between two neutral atoms by means of Quantum-Electrodynamics method [1]. He showed that the retarded VDW forces decays faster than the usual van der waals interaction by 1/R. The Casimir force between two uncharged conductors in vacuum gives the proof of vacuum field fluctuation of electromagnetic modes [2]. Casimir force has a strong dependence on the geometry of the system. Lifshitz, Schwinger and others later modified Casimir’s calculations to explain and verify the implication of this force on real experiments. One of the first successful experimental studies is done by by Mohideen et. al. by AFM [5] between a sphere and a conductor. The Casimir effect has a very wide applicability to various fields of science.

References:

[1] H. B. G. Casimir and D. Polder, Phys. Rev. 73,360 (1948)

[2] H. B. G. Casimir., Proc. Kon. Ned. Akad. Wetendchap 51,793 (1948)

[3] E. M. Lifshitz, J. Exp. Theor. Phys. 2,73 (1956)

[4] J. Schwinger, L. L. DeRaad, Jr., and K. A. Milton, Ann. Phys. (N.Y.) 1, 115 (1978)

[5] U. Mohideen and A. Roy Phys. Rev. Lett. 81, 21 (1998)

ALL ARE CORDIALLY INVITED TO ATTEND

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