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PPT - Fernando Brandao
PPT - Fernando Brandao

Enhanced Symmetries and the Ground State of String Theory
Enhanced Symmetries and the Ground State of String Theory

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... Otherwise  ic   jc   kc  1  0 Solutions  i  and only solutions are zero energy ground states of the Hamiltonian M ...
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... These registration acts are events, and we can record their time. Therefore in quantum theory events, together with their timing, are important observational data. Events are being recorded also in nuclear decays. Yet timing of the events was escaping precise quantum mechanical formulation, mainly ...
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... mysterious phenomenon of all: light itself. Electric and magnetic fields, Maxwell knew, could be visualized as force fields that permeate all space. They can be represented by an infinite array of arrows emanating smoothly from an electric charge. For example, the force fields created by a bar magne ...
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... years the concept of coherent states was also introduced to non-Hermitian quantum mechanics [1, 10]. In this perspective, we have constructed in a recent paper [3] pseudo-fermionic coherent states for pseudo-Hermitian two-level Hamiltonians with real spectrum. Our aim is to develops the ideas of [3] ...
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... but which quantitatively reproduces the results of measurements made on ensembles of identically prepared systems. According to such an interpretation we may assign well-defined trajectories and spin vectors to particles and study how these interact with the apparatus during the course of a measurem ...
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Basic concepts in quantum mechanics
Basic concepts in quantum mechanics

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Scalar field theory

In theoretical physics, scalar field theory can refer to a classical or quantum theory of scalar fields. A scalar field is invariant under any Lorentz transformation.The only fundamental scalar quantum field that has been observed in nature is the Higgs field. However, scalar quantum fields feature in the effective field theory descriptions of many physical phenomena. An example is the pion, which is actually a pseudoscalar.Since they do not involve polarization complications, scalar fields are often the easiest to appreciate second quantization through. For this reason, scalar field theories are often used for purposes of introduction of novel concepts and techniques.The signature of the metric employed below is (+, −, −, −).
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