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 Point: Overview, Quantum Critical Endpoints, Non-equilibrium Quantum Phase Transition
Famous quotes containing the words quantum, critical and/or point:
“But how is one to make a scientist understand that there is something unalterably deranged about differential calculus, quantum theory, or the obscene and so inanely liturgical ordeals of the precession of the equinoxes.”
—Antonin Artaud (1896–1948)
“To affect the quality of the day, that is the highest of arts. Every man is tasked to make his life, even in its details, worthy of the contemplation of his most elevated and critical hour.”
—Henry David Thoreau (1817–1862)
“The point is that nationalism, even in its latest madhouse frenzies under Mussolini and Hitler, is still, like advertising, an arm of big business. Nations as we know them today, were the invention of business and it is natural that business should still consider itself slightly above patriotism and that the strongest international should still be the international of profits.”
—John Dos Passos (1896–1970)