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In theoretical physics, quantum field theory (QFT) is a theoretical framework that combines field theory and the principle of relativity with ideas behind quantum mechanics. [1]: xi QFT is used in particle physics to construct physical models of subatomic particles and in condensed matter physics to construct models of quasiparticles.
Download QR code; Print/export ... to the understanding of many-body problems in the quantum theory of condensed matter" ... dynamical mean field theory" (PDF ...
Quantum field theories are also used throughout condensed matter physics to model particle-like objects called quasiparticles. [16] In the AdS/CFT correspondence, one considers, in addition to a theory of quantum gravity, a certain kind of quantum field theory called a conformal field theory.
Condensed matter physics is the field of physics that deals with the macroscopic and microscopic physical properties of matter, especially the solid and liquid phases, that arise from electromagnetic forces between atoms and electrons. More generally, the subject deals with condensed phases of matter: systems of many constituents with strong ...
If there is a single energy scale in the microscopic theory, then the effective field theory can be seen as an expansion in /. The construction of an effective field theory accurate to some power of 1 / M {\displaystyle 1/M} requires a new set of free parameters at each order of the expansion in 1 / M {\displaystyle 1/M} .
Solid-state physics is the study of rigid matter, or solids, through methods such as solid-state chemistry, quantum mechanics, crystallography, electromagnetism, and metallurgy. It is the largest branch of condensed matter physics.
The theory is based on a disorder field theory dual to the order field theory of L.D. Landau for phase transitions which Kleinert developed in the books on Gauge Fields in Condensed Matter. In this theory, the statistical properties of fluctuating vortex or defect lines are described as elementary excitations with the help of fields, whose ...
His research is in theoretical condensed matter physics, although he is also known for his earlier work in theoretical particle physics.In 2009, Shankar was awarded the Julius Edgar Lilienfeld Prize from the American Physical Society for "innovative applications of field theoretic techniques to quantum condensed matter systems". [2]