Structural features of sequential weak measurements
نویسندگان
چکیده
منابع مشابه
Measuring Incompatible Observables Through Sequential Weak Measurements
Measurements are the very basis of Physics. In quantum mechanics they assume even a more fundamental role since observables can have undetermined values that “collapse” on a specific one only when a strong measurement (described by a projection operator) is done. Furthermore, a crucial feature of quantum measurement is that measuring one observable completely erases the information on the corre...
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The weak value of a variable O is a description of an effective interaction with that variable in the limit of weak coupling. For a pre-and post-selected system described at time t by the two-state vector Φ| |Ψ (see entry Two-State Vector Formalism), the weak value is [1]: O w ≡ Φ|O|Ψ Φ|Ψ. (1) Contrary to classical physics, variables in quantum mechanics might not have definite values at a give...
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I propose a scheme for reconstructing the weak value of an observable without the need for weak measurements. The post-selection in weak measurements is replaced by an initial projector measurement. The observable can be measured using any form of interaction, including projective measurements. The reconstruction is effected by measuring the change in the expectation value of the observable due...
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If a Banach space E has an equivalent smooth norm, then every bounded sequence in E* has a weak* converging subsequence. Generalizations of this result are obtained.
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2016
ISSN: 2469-9926,2469-9934
DOI: 10.1103/physreva.94.010103