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Condensed matter physics

(condensedmatterphysics,condensedmatter physics,condensed matterphysics)

Condensed matter physics is the field of physics that deals withthe macroscopic physical properties of matter . In particular, it is concerned with the"condensed" phases that appear whenever the number of constituentsin a system are extremely large and the interactions between the constituents are strong. The most familiar examples of condensedphases are solids and liquids , which arise fromthe electric force between atoms .More exotic condensed phases include the superfluid and the Bose-Einstein condensate found in certain atomic systems atvery low temperatures , the superconducting phase exhibited by conduction electrons in certain materials, and the ferromagnetic and antiferromagnetic phases of spins on atomic lattices .

Condensed matter physics is by far the largest field of contemporary physics. By one estimate, one third of all American physicists identify themselves as condensed matter physicists. Historically,condensed matter physics grew out of solid-state physics ,which is now considered one of its main subfields. The term "condensed matter physics" was apparently coined by Philip Anderson when he renamed his research group - previously"solid-state theory" - in 1967 . In 1978 , the Divisionof Solid State Physics at the American PhysicalSociety was renamed as the Division of Condensed Matter Physics.

One of the reasons for calling the field "condensed matter physics" is that many of the concepts and techniques developed forstudying solids actually apply to fluid systems. For instance, the conduction electrons in an electrical conductor form a type of quantum fluid with essentiallythe same properties as fluids made up of atoms. In fact, the phenomenon of superconductivity , in which the electrons condense into a new fluid phase in which they can flow withoutdissipation, is very closely analogous to the superfluid phase found in helium 3 atlow temperatures.

Condensed matter physics is also closely related to the field of materials science .

Topics in Condensed Matter Physics

General subfields within physics

Classical mechanics | Condensed matterphysics | Continuum mechanics | Electromagnetism | General relativity | Particle physics | Quantum field theory | Quantum mechanics | Solid statephysics | Special relativity | Statistical mechanics | Thermodynamics

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