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principle and locality
It turns out that the usual rules for combining quantum mechanical and classical descriptions violate the principle of locality without violating causality.
However, the principle of locality appeals powerfully to physical intuition, and Einstein, Podolsky and Rosen were unwilling to abandon it.
However, quantum field theories that are " local " in this sense appear to violate the principle of locality as defined by EPR, but they nevertheless do not violate locality in a more general sense.
Violation of locality is difficult to reconcile with special relativity, and is thought to be incompatible with the principle of causality.
However, recent developments attempt to show that if locality is only approximate and the holographic principle is correct, the Weinberg – Witten theorem would not be valid.
So, despite the interest, the flaw in EPR's argument was not discovered until 1964, when John Stewart Bell demonstrated precisely how one of their key assumptions, the principle of locality, conflicted with quantum theory.
For a hidden variable theory, if Bell's conditions are correct, then the results which are in agreement with quantum mechanical theory appear to evidence superluminal effects, in contradiction to the principle of locality.
In addition, statistical ensembles in physics are often built on a principle of locality: that all interactions are only between neighboring atoms or nearby molecules.
The statistical formulation of the principle of locality is now seen to be a form of the Markov property in the broad sense ; nearest neighbors are now Markov blankets.
In computer science, locality of reference, also known as the principle of locality, is the phenomenon of the same value or related storage locations being frequently accessed.
The locality of reference, also known as the locality principle, is the phenomenon that the collection of the data locations referenced in a short period of time in a running computer often consists of relatively well predictable clusters.
In quantum field theory, causality is closely related to the principle of locality.
However, the principle of locality is disputed: whether it strictly holds depends on the interpretation of quantum mechanics chosen, especially for experiments involving quantum entanglement that satisfy Bell's Theorem.
# REDIRECT principle of locality
* Locality, physics concept of principle of locality
Caching is an effective manner of improving performance in situations where the principle of locality of reference
One of the defining features of the local churches is their adherence to the principle that all Christians in a city or locality are automatically members of the one church in that locality.
# the principle of locality.
Therefore we can either abandon the principle of locality ( which most physicists are reluctant to do ) or we are forced to accept that the electromagnetic 4-potential-composed of Φ and A-offers a more complete description of electromagnetism than the electric and magnetic fields can.
In physics, the principle of locality states that an object is influenced directly only by its immediate surroundings.

principle and states
In 1961 the first important legislative victory of the Kennedy Administration came when the principle of national responsibility for local economic distress won out over a `` state's-responsibility '' proposal -- provision was made for payment for unemployment relief by nation-wide taxation rather than by a levy only on those states afflicted with manpower surplus.
For better or for worse, we all now live in welfare states, the organizing principle of which is collective responsibility for individual well-being.
The greatest impact of the matching-fund principle has been in initially encouraging the poorest states and school districts to spend enough to obtain their full allocation of outside funds.
To prevent this unphysical situation from happening, Dirac proposed that a " sea " of negative-energy electrons fills the universe, already occupying all of the lower-energy states so that, due to the Pauli exclusion principle, no other electron could fall into them.
The most important of these was the principle that came to be called Ampère ’ s law, which states that the mutual action of two lengths of current-carrying wire is proportional to their lengths and to the intensities of their currents.
This provision has been dormant since Queen Victoria ascended the throne, because she did not inherit Hanover under the Salic Laws of the German states, but in principle it could again become relevant in the future.
The strong anthropic principle ( SAP ) as explained by Barrow and Tipler ( see variants ) states that this is all the case because the Universe is compelled, in some sense, for conscious life to eventually emerge.
Critics of the SAP argue in favor of a weak anthropic principle ( WAP ) similar to the one defined by Brandon Carter, which states that the universe's ostensible fine tuning is the result of selection bias: i. e., only in a universe capable of eventually supporting life will there be living beings capable of observing any such fine tuning, while a universe less compatible with life will go unbeheld.
The anthropic principle states that this is a necessity, because if life were impossible, no one would know it.
The cosmological principle states that on large scales the Universe is homogeneous and isotropic.
If the large-scale Universe appears isotropic as viewed from Earth, the cosmological principle can be derived from the simpler Copernican principle, which states that there is no preferred ( or special ) observer or vantage point.
According to some versions of functionalism, even non-human systems, such as other animal species, alien life forms, or advanced computers can, in principle, have mental states.
Fred Dretske has objected to the transitivity principle on the basis that we often experience mental states that are consciously different without being aware of the conscious different.
In physical cosmology, the Copernican principle, named after Nicolaus Copernicus, states that the Earth is not in a central, specially favored position.
An underlying principle in Taoism states that within every independent entity lies a part of its opposite.
The Huygens – Fresnel principle is one such model ; it states that each point on a wavefront generates a secondary spherical wavelet, and that the disturbance at any subsequent point can be found by summing the contributions of the individual wavelets at that point.
The guiding principle for the qualification of Dublin Core elements, colloquially known as the Dumb-Down Principle, states that an application that does not understand a specific element refinement term should be able to ignore the qualifier and treat the metadata value as if it were an unqualified ( broader ) element.
The report to the European Parliament of 2001 states: " If UKUSA states operate listening stations in the relevant regions of the earth, in principle they can intercept all telephone, fax and data traffic transmitted via such satellites.
This argument is embodied in the Copernican principle, which states that the Earth does not occupy a unique position in the Universe, and the mediocrity principle, which holds that there is nothing special about life on Earth.
The competitive exclusion principle states that two species cannot coexist indefinitely by living off the same limiting resource ; one will always outcompete the other.
The first principle of skilled memory, the meaningful encoding principle, states that experts exploit prior knowledge to durably encode information needed to perform a familiar task successfully.

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