Pre- and post-selected measurements with coupling-strength-dependent modulation
نویسندگان
چکیده
منابع مشابه
Nonperturbative theory of weak pre- and post-selected measurements
This paper starts with a brief review of the topic of strong and weak preand post-selected (PPS) quantum measurements, as well as weak values, and afterwards presents original work. In particular, we develop a nonperturbative theory of weak PPS measurements of an arbitrary system with an arbitrary meter, for arbitrary initial states of the system and the meter. New and simple analytical formula...
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The interaction of an open system S with a preand post-selected environment is studied. In general, under such circumstances S can not be described in terms of a density matrix, even when S in not post-selected. However, a simple description in terms of a two-state (TS) is always available. The two-state of S evolves in ti me from an initially ‘pure’ TS to a ‘mixed’ TS and back to a final ‘pure...
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We have remeasured the lifetimes of the 3s24s and levels in Si II using beam foil spectro3s25s 2S1@2 scopic techniques. Measured values for the lifetimes and oscillator strengths derived from them are presented and compared with previous measurements and theoretical calculations. Agreement with recent theoretical calculations is now quite good : for 3s24s it is excellent and for 3s25s it is sat...
متن کاملThe Curious Quantum Mechanics of Pre- and Post-Selected Ensembles
In a provocative paper, (~) Albert, Aharonov, and D'Amato proposed an analysis of preand post-selected ensembles in quantum mechanics (PPS ensembles) which seemed to show that in the interval between preand post-selection, certain noncommuting observables all have determinate values. Moreover, these values are context dependent: The value assumed by a degenerate observable (e.g., an observable ...
متن کاملSecure Key Distribution via Pre- and Post-Selected Quantum Ensembles
A quantum key distribution scheme whose security depends on the features of preand post-selected quantum ensembles is described. PACS numbers: 03.65.Bz, 42.80.Sa, 89.70.+c A wide variety of quantum key distribution schemes have been proposed, following the original Bennett and Brassard protocol [1]. Ekert [2] has described a scheme in which two parties, Alice and Bob, create a shared random key...
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ژورنال
عنوان ژورنال: Chinese Physics B
سال: 2019
ISSN: 1674-1056,2058-3834
DOI: 10.1088/1674-1056/28/3/030602