Heisenberg cut

== English == === Alternative forms === Heisenberg's cut === Etymology === Named after Werner Heisenberg, who contributed to the Copenhagen interpretation of quantum mechanics, and specifically to the theory of wavefunction collapse. === Noun === Heisenberg cut (plural Heisenberg cuts) (quantum mechanics, philosophy of physics) A conceptualised division separating the quantum system being observed from the classical system that comprises the observer's information, knowledge and conscious awareness. ==== Usage notes ==== As a concept whose physical existence is uncertain, the Heisenberg cut is primarily of theoretical and philosophical interest. The observed quantum system (everything governed by the wavefunction) is said to be below the cut. The system of the observer is said to be above the cut. Interpretations of quantum mechanics that do not rely on the concept of wavefunction collapse do not require Heisenberg cuts. ==== Translations ==== === Further reading === De Broglie–Bohm theory on Wikipedia.Wikipedia Pilot wave theory on Wikipedia.Wikipedia Wave function on Wikipedia.Wikipedia Schrödinger's cat on Wikipedia.Wikipedia Wave function collapse on Wikipedia.Wikipedia