Meaning of decoherence | Babel Free

Definitions

1. Loss of quantum coherence (phase relation between the quantum states of particles) in a physical system as it interacts with its environment.
   countable, uncountable
2. The normal condition of sensitiveness in a coherer; reversion to such condition.
   countable, dated, uncountable

Equivalents

Examples

“There is a sense⟳ in which simple interference effects are destroyed when a system's environment becomes correlated with its state. This phenomenon is called decoherence. I shall consider⟳ three approaches here. According to one, decoherence alone explains why we get⟳ determinate records. According to another, decoherence helps one to formulate a satisfactory interpretation of Everett by selecting a globally preferred basis that makes the right physical facts determinate in each Everett branch. According to a third, decoherence sects a locally preferred basis for each observer that makes the right physical facts determinate from the perspective of that particular observer.”

“We have⟳ already alluded to decoherence in connection with the emergence of classical space-time, the ‘collapse′ of the wave⟳ function (Case 3) and the notion of entanglement. Physicists have⟳ hailed the discovery of decoherence as ‘the most important advance in the foundation of quantum theory since Bell's inequalities.’¹³¹ This praise⟳ is based on good reasons: (a) decoherence offers new ways of understanding quantum mechanics for it embodies a critique of entrenched terminology (‘collapse’ of the wave⟳ function, complementarity); (b) it is testable since it appeals to physical processes; (c) it offers an insight into a much more fundamental level of quantum indeterminacy.”

“A detailed investigation of decoherence during gating due to a bosonic environment was performed in the original work⟳ of Loss and DiVincenzo. Since then, there have⟳ been many studies of leakage and decoherence in the context of the quantum-dot quantum computing proposal.”

“One way of preventing both decoherences is to set⟳ up the system in a "non-decoherent quantum state."”

CEFR level