Particle-number conservation, causality and linear response in biomedical imaging

Causality and Conservation

How do we find order in the ever-changing and fleeting appearances with which we are continually presented? How can we think change in a coherent way – i.e. without betraying the stringency of thinking as an act guided by its own norms? This is one of the most basic questions that shaped Western philosophy as a field with its own set of characteristic problems to which any philosopher is forced...

Particle Number Conservation in Tiie Massive Thirring Model

We computed parr-production and nontrivlal three-particle scattering amphtudes of the massive Thirring model in one loop approximation. They are found to be zero. In contrast to the massless Thirring model in the massive Thirring model an explicit solution is unknown. Methods [1] useful in the massless case cannot be applied because the axial current is not conserved. Moreover the S-matrix deri...

Nuclear Pairing Problem with Exact Particle Number Conservation

Effects of particle-number conservation on heat capacity of nuclei

K. Tanabe† Department of Physics, Faculty of Science, Saitama University, Sakura, Saitama 338-8570, Japan (Dated: June 8, 2005) Abstract By applying the particle-number projection to the finite-temperature BCS theory, the S-shaped heat capacity, which has recently been claimed to be a fingerprint of the superfluid-to-normal phase transition in nuclei, is reexamined. It is found that the particl...

Discourse Causality Recognition in the Biomedical Domain

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