Hidden Variable

Hidden variables may refer to:

  • Hidden variable theories, in physics, the proposition that statistical models of physical systems (such as Quantum Mechanics) are inherently incomplete, and that the apparent randomness of a system depends not on collapsing wave functions, but rather due to unseen or unmeasurable (and thus "hidden") variables. In sharp contrast to the generally accepted Copenhagen Interpretation.
  • Latent variables, in statistics, variables that are inferred from other observed variables
  • Hidden transformation, in computer science, a way to transform a generic constraint satisfaction problem into a binary one by introducing new hidden variables
  • Confounding or hidden variables in general. That is, a variable that actually creates the illusion of a causal relation (e.g. firemen often appear after smoke, not because smoke causes firemen, but because fire causes both smoke and firemen)

Other articles related to "hidden variable":

Kochen–Specker Theorem - History
... by von Neumann, purporting to prove the impossibility of the hidden variable theories yielding the same results as quantum mechanics ... of quantum mechanics, generally accepted as a hidden variable theory underpinning quantum mechanics ... assume that quantum reality is nonlocal, and that probably only local hidden variable theories are in disagreement with quantum mechanics ...
... arguably unlikely, that someone could exploit this loophole to construct a local hidden variable theory that reproduces the predictions of quantum mechanics ... performed at each detector can be chosen independently of each other and of the hidden variable being measured ... It is unlikely for the hidden variable to be sensitive to all of the same small influences that the random number generator was ...
Local Hidden Variable Theory - Bell Tests With No "non-detections"
... It will be the "hidden variable" in our model ... Taking it to be a unit vector, all possible values of the hidden variable are represented by all points on the surface of a unit sphere ... for any given pair of particles is determined by the region within which their hidden variable falls ...
Kochen–Specker Theorem - Remarks On The KS Theorem
... Since subquantum reality (as described by the hidden variable theory) may be dependent on the measurement context, it is possible that relations between quantum ... Hence, the KS theorem does only exclude noncontextual hidden variable theories ... Elements of physical reality, if existing, would seem to need a subquantum (hidden variable) theory for their description rather than quantum mechanics ...

Famous quotes containing the words variable and/or hidden:

    There is not so variable a thing in nature as a lady’s head-dress.
    Joseph Addison (1672–1719)

    Impenetrable in their dissimulation, cruel in their vengeance, tenacious in their purposes, unscrupulous as to their methods, animated by profound and hidden hatred for the tyranny of man—it is as though there exists among them an ever-present conspiracy toward domination, a sort of alliance like that subsisting among the priests of every country.
    Denis Diderot (1713–1784)