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Title: Measurement of the Casimir force between Germanium plates using a torsion balance

Abstract

We report the measurement of the Casimir force between Ge plates in a sphere-plane configuration using a torsion balance. We observe that the effective contact potential between the plates varies with their separation distance, resulting in a systematic force. In addition, an unexpected 1/d force is also found in our data that persists even when the electrostatic force between the plates is experimentally minimized by applying a compensating potential. After applying corrections due to these systematic forces, likely of electrostatic origin, our result can be described by the bare permittivity of Ge without conduction, the Drude and the diffusion models for electrical and optical properties of Ge, but not by the plasma model.

Authors:
 [1];  [2];  [2];  [2]
  1. Los Alamos National Laboratory
  2. YALE UNIV
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
960868
Report Number(s):
LA-UR-08-07718; LA-UR-08-7718
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US201008%%777
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Name: Physical Review Letters; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
71; BALANCES; CASIMIR EFFECT; CONFIGURATION; CORRECTIONS; DIFFUSION; DISTANCE; ELECTROSTATICS; GERMANIUM; OPTICAL PROPERTIES; ORIGIN; PERMITTIVITY; PLASMA; PLATES; POTENTIALS; TORSION

Citation Formats

Dalvit, Diego, Kim, W J, Sushkov, A O, and Lamoreaux, S K. Measurement of the Casimir force between Germanium plates using a torsion balance. United States: N. p., 2008. Web.
Dalvit, Diego, Kim, W J, Sushkov, A O, & Lamoreaux, S K. Measurement of the Casimir force between Germanium plates using a torsion balance. United States.
Dalvit, Diego, Kim, W J, Sushkov, A O, and Lamoreaux, S K. Tue . "Measurement of the Casimir force between Germanium plates using a torsion balance". United States. https://www.osti.gov/servlets/purl/960868.
@article{osti_960868,
title = {Measurement of the Casimir force between Germanium plates using a torsion balance},
author = {Dalvit, Diego and Kim, W J and Sushkov, A O and Lamoreaux, S K},
abstractNote = {We report the measurement of the Casimir force between Ge plates in a sphere-plane configuration using a torsion balance. We observe that the effective contact potential between the plates varies with their separation distance, resulting in a systematic force. In addition, an unexpected 1/d force is also found in our data that persists even when the electrostatic force between the plates is experimentally minimized by applying a compensating potential. After applying corrections due to these systematic forces, likely of electrostatic origin, our result can be described by the bare permittivity of Ge without conduction, the Drude and the diffusion models for electrical and optical properties of Ge, but not by the plasma model.},
doi = {},
url = {https://www.osti.gov/biblio/960868}, journal = {Physical Review Letters},
issn = {0031-9007},
number = ,
volume = ,
place = {United States},
year = {2008},
month = {1}
}