Results 341 to 350 of about 1,148,835 (372)

On gauge invariance and vacuum polarization

, 1951
This paper is based on the elementary remark that the extraction of gauge invariant results from a formally gauge invariant theory is ensured if one employs methods of solution that involve only gauge covariant quantities. We illustrate this statement in
J. Schwinger
semanticscholar   +1 more source

Control of valley polarization in monolayer MoS2 by optical helicity.

Nature Nanotechnology, 2012
Electronic and spintronic devices rely on the fact that free charge carriers in solids carry electric charge and spin. There are, however, other properties of charge carriers that might be exploited in new families of devices. In particular, if there are
K. Mak, K. He, J. Shan, T. Heinz
semanticscholar   +1 more source

Biased Assimilation and Attitude Polarization: The Effects of Prior Theories on Subsequently Considered Evidence

, 1979
People who hold strong opinions on complex social issues are likely to examine relevant empirical evidence in a biased manner. They are apt to accept "confirming" evidence at face value while subjecting "discontinuing" evidence to critical evaluation ...
C. G. Lord, L. Ross, M. Lepper
semanticscholar   +1 more source

Nonorthogonal polarizers: a polar analysis

Optics Letters, 2014
An analysis of the operators of some widespread nonorthogonal polarizers is performed on the basis of the polar factorization theorem, in pure operatorial (nonmatrix) Dirac algebraic language. The role of the unitary polar component as a converter of the two sets of singular eigenvectors of the operator, one in the other, is emphasized in each case ...
openaire   +3 more sources

Strategic Polarization [PDF]

Journal of Mathematical Psychology, 2001
In joint decision making, similarly minded people may take opposite positions. Consider the example of a marriage in which one spouse gives generously to charity while the other donates nothing. Such "polarization" may misrepresent what is, in actuality, a small discrepancy in preferences.
Adam Kalai, Ehud Kalai
openaire   +4 more sources

Dielectric metasurfaces for complete control of phase and polarization with subwavelength spatial resolution and high transmission.

Nature Nanotechnology, 2014
Metasurfaces are planar structures that locally modify the polarization, phase and amplitude of light in reflection or transmission, thus enabling lithographically patterned flat optical components with functionalities controlled by design.
A. Arbabi, Y. Horie, M. Bagheri, A. Faraon   +3 more
semanticscholar   +1 more source

The Role of Polarization in Photocatalysis.

Angewandte Chemie, 2019
Semiconductor photocatalysis as a desirable technology shows great potential in environmental remediation and renewable energy generation, but its efficiency is severely restricted by the rapid recombination of charge carriers in the bulk phase and on ...
Fang Chen, Hongwei Huang, Lin Guo, Yihe Zhang, Tianyi Ma   +4 more
semanticscholar   +1 more source

Polar Spaces and Polarities

2011
The present chapter is devoted to the study of the so-called polar spaces.
openaire   +2 more sources

Fear and Loathing across Party Lines: New Evidence on Group Polarization

, 2015
When defined in terms of social identity and affect toward copartisans and opposing partisans, the polarization of the American electorate has dramatically increased.
S. Iyengar, S. Westwood
semanticscholar   +1 more source

Theory of polarization of crystalline solids.

Physical Review B (Condensed Matter), 1993
We consider the change in polarization \ensuremath{\Delta}P which occurs upon making an adiabatic change in the Kohn-Sham Hamiltonian of the solid. A simple expression for \ensuremath{\Delta}P is derived in terms of the valence-band wave functions of the
R. D. King-Smith, D. Vanderbilt
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