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Momentum operator

Known as: 4-momentum operator, Four-momentum operator 
In quantum mechanics, momentum (like all other physical variables) is defined as an operator, which "acts on" or pre-multiplies the wave function ψ(r… Expand
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Papers overview

Semantic Scholar uses AI to extract papers important to this topic.
2017
2017
We study the behavior of entanglement between different degrees of freedom of scattering fermions, based on an exemplary QED… Expand
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Highly Cited
2011
Highly Cited
2011
A translation operator is introduced to describe the quantum dynamics of a position-dependent mass particle in a null or constant… Expand
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2010
2010
Within the framework of nonrelativistic QED, we prove that, for small values of the coupling constant, the energy function, $${E_… Expand
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Review
2008
Review
2008
The basic properties of $\pi$-electrons near the Fermi level in graphene are reviewed from a point of view of the pseudospin and… Expand
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Highly Cited
2006
Highly Cited
2006
Ordering ambiguity associated with the von Roos position dependent mass (PDM) Hamiltonian is considered. An affine locally scaled… Expand
Highly Cited
2005
Highly Cited
2005
Existence of a minimal observable length which has been indicated by string theory and quantum gravity, leads to a modification… Expand
2002
2002
We analyse Coleman’s theorem asserting the absence Goldstone bosons and spontaneously broken continuous symmetry in the quantum… Expand
2002
2002
The interrelations between the two definitions of momentum operator, via the canonical energy-momentum tensorial operator and as… Expand
Highly Cited
2000
Highly Cited
2000
The semiclassical Einstein-Langevin equations which describe the dynamics of stochastic perturbations of the metric induced by… Expand
Review
1998
Review
1998
A general pedagogical survey of the basics of the Bethe-Salpeter equation and in particular Wick-Cutkosky model is given in great… Expand