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In quantum mechanics, a quantum speed limit (QSL) is a limitation on the minimum time for a quantum system to evolve between two distinguishable (orthogonal) states. [1]
The Lieb–Robinson bound is a theoretical upper limit on the speed at which information can propagate in non-relativistic quantum systems. It demonstrates that information cannot travel instantaneously in quantum theory, even when the relativity limits of the speed of light are ignored.
A quantum limit in physics is a limit on measurement accuracy at quantum scales. [1] Depending on the context, the limit may be absolute (such as the Heisenberg limit), or it may only apply when the experiment is conducted with naturally occurring quantum states (e.g. the standard quantum limit in interferometry) and can be circumvented with advanced state preparation and measurement schemes.
It therefore follows from the negative answer to Hilbert's tenth problem that quantum optimal controllability is in general undecidable. [21] Once constraints are imposed controllability can be degraded. For example, what is the minimum time required to achieve a control objective? [22] This is termed the "quantum speed limit".
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A fundamental physical constant occurring in quantum mechanics is the Planck constant, h. A common abbreviation is ... c = speed of light = (/,) = ...
The Margolus–Levitin theorem sets a bound on the maximum computational speed per unit of energy: 6 × 10 33 operations per second per joule.This bound, however, can be avoided if there is access to quantum memory.
Today, the company announced the completion of its latest expansion at the IBM Quantum Data Center in Poughkeepsie, New York. ... 16 times better performance and a 25-fold increase in speed over ...