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Ground state properties of Nelson's model by functional integrationJózsef Lörinczi Friday, 30 May 2008, 16.00, W2.19 Nelson's model describes the interacting system of an electrically charged quantum particle with a massless scalar boson field. I will present rigorous results on the existence and properties of the ground state by using functional integration methods. Also, I will explain how the problem of infrared and ultraviolet divergences can be solved. Although my main object will be Nelson's model, I will briefly address aspects of related problems of the Pauli-Fierz (quantized Maxwell field) model with spin and the polaron/bipolaron model. |
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