Quantum Critical Point

A quantum critical point is a special class of continuous phase transition that takes place at the absolute zero of temperature, typically in a material where the phase transition temperature has been driven to zero by the application of a pressure, field or through doping. Conventional phase transitions occur at finite temperature, when the growth of random thermal fluctuations leads to a change in the physical state of a system. Condensed matter physics research over the past few decades has revealed a new class of phase transitions, called a quantum phase transition, which take place at absolute zero, and which are driven by the zero point quantum fluctuations associated with Heisenberg's uncertainty principle.


Read more about Quantum Critical PointOverview, Quantum Critical Endpoints, Non-equilibrium Quantum Phase Transition

Other articles related to "quantum, quantum critical point, quantum critical":

Quantum Phase Transition
... In physics, a quantum phase transition (QPT) is a phase transition between different quantum phases (phases of matter at zero temperature) ... Contrary to classical phase transitions, quantum phase transitions can only be accessed by varying a physical parameter - such as magnetic field or pressure ... abrupt change in the ground state of a many-body system due to its quantum fluctuations ...
Quantum Critical Point - Non-equilibrium Quantum Phase Transition
... What happens when a quantum critical point is affected by noise? An intuitive guess would be that the external noise defines an effective temperature ... problem and break the scale invariance of the quantum critical point ... On the contrary, it was recently found that certain types of noise can induce a non-equilibrium quantum critical state ...

Famous quotes containing the words point, quantum and/or critical:

    Many women are surprised by the intensity of their maternal pull and the conflict it brings to their competing roles. This is the precise point at which many women feel the stress of the work/family dilemma most keenly. They realize that they may have a price to pay for wanting to be both professionals and mothers. They feel guilty for not being at work, and angry for being manipulated into feeling this guilt. . . . They don’t quite fit at home. They don’t quite fit at work.
    Deborah J. Swiss (20th century)

    A personality is an indefinite quantum of traits which is subject to constant flux, change, and growth from the birth of the individual in the world to his death. A character, on the other hand, is a fixed and definite quantum of traits which, though it may be interpreted with slight differences from age to age and actor to actor, is nevertheless in its essentials forever fixed.
    Hubert C. Heffner (1901–1985)

    The critical method which denies literary modernity would appear—and even, in certain respects, would be—the most modern of critical movements.
    Paul Deman (1919–1983)