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Quantum decoherence has been studied to understand how quantum systems convert to systems that can be explained by classical mechanics. Beginning out of attempts to extend the understanding of quantum mechanics, the theory has developed in several directions and experimental studies have confirmed some of the key issues.
Quantum decoherence is a mechanism through which quantum systems lose coherence, and thus become incapable of displaying many typically quantum effects: quantum superpositions become simply probabilistic mixtures, and quantum entanglement becomes simply classical correlations.
Zeh further claims that decoherence makes it possible to identify the fuzzy boundary between the quantum microworld and the world where the classical intuition is applicable. [ 25 ] [ 26 ] Quantum decoherence becomes an important part of some modern updates of the Copenhagen interpretation based on consistent histories .
The in depth study of quantum decoherence has proposed that collapse is related to the interaction of a quantum system with its environment. Historically, Werner Heisenberg was the first to use the idea of wave function reduction to explain quantum measurement.
Decoherence approaches to interpreting quantum theory have been widely explored and developed since the 1970s. [ 9 ] [ 10 ] [ 11 ] MWI is considered a mainstream interpretation of quantum mechanics , along with the other decoherence interpretations, the Copenhagen interpretation , and hidden variable theories such as Bohmian mechanics .
Quantum decoherence ensures that the different outcomes have no interaction with each other. Decoherence is generally considered to prevent simultaneous observation of multiple states. [26] [27] A variant of the Schrödinger's cat experiment, known as the quantum suicide machine, has been proposed by cosmologist Max Tegmark. It examines the ...
The definition of quantum theorists' terms, such as wave function and matrix mechanics, progressed through many stages.For instance, Erwin Schrödinger originally viewed the electron's wave function as its charge density smeared across space, but Max Born reinterpreted the absolute square value of the wave function as the electron's probability density distributed across space; [3]: 24–33 ...
That these codes allow indeed for quantum computations of arbitrary length is the content of the quantum threshold theorem, found by Michael Ben-Or and Dorit Aharonov, which asserts that you can correct for all errors if you concatenate quantum codes such as the CSS codes—i.e. re-encode each logical qubit by the same code again, and so on, on ...