Jaynes-Cummings model under continuous measurement: Weak chaos in a quantum system induced by unitarity collapse

1998 ◽  
Vol 58 (4) ◽  
pp. 3293-3302 ◽  
Author(s):  
Tsuyoshi Fukuo ◽  
Tetsuo Ogawa ◽  
Katsuhiro Nakamura
Keyword(s):  
Quantum System ◽  
Continuous Measurement

scholarly journals Transition to classical chaos in a coupled quantum system through continuous measurement

2004 ◽  
Vol 69 (5) ◽  
Author(s):  
Shohini Ghose ◽  
Paul Alsing ◽  
Ivan Deutsch ◽  
Tanmoy Bhattacharya ◽  
Salman Habib
Keyword(s):  
Quantum System ◽  
Continuous Measurement ◽  
Classical Chaos

scholarly journals QUANTUM ZENO EFFECT AND THE DETECTION OF GRAVITOMAGNETISM

2001 ◽  
Vol 10 (01) ◽  
pp. 9-14 ◽  
Author(s):  
A. CAMACHO
Keyword(s):  
Quantum System ◽  
Continuous Measurement ◽  
Quantum Zeno Effect ◽  
Zeno Effect ◽  
The Earth ◽  
Gravitomagnetic Field

In this work we introduce two experimental proposals that could shed some light upon the inertial properties of intrinsic spin. In particular we will analyze the role that the gravitomagnetic field of the Earth could have on a quantum system with spin 1/2. We will deduce the expression for Rabi transitions, which depend, explicitly, on the coupling between the spin of the quantum system and the gravitomagnetic field of the Earth. Afterwards, the continuous measurement of the energy of the spin-1/2 system is considered, and an expression for the emerging quantum Zeno effect is obtained. Thus, it will be proved that gravitomagnetism, in connection with spin-1/2 systems, could induce not only Rabi transitions but also a quantum Zeno effect.

Feedback control for communication with non-orthogonal states

2007 ◽  
Vol 7 (1&2) ◽  
pp. 127-138
Author(s):  
K. Jacobs
Keyword(s):  
Feedback Control ◽  
Quantum System ◽  
Continuous Measurement ◽  
Information Gain ◽  
Quantum Mechanical ◽  
Optimal Measurement ◽  
Classical Information ◽  
Long Time ◽  
Initial Preparation ◽  
Initial States

Communicating classical information with a quantum system involves the receiver making a measurement on the system so as to distinguish as well as possible the alphabet of states used by the sender. We consider the situation in which this measurement takes an appreciable time. In this case the measurement must be described by a continuous measurement process. We consider a continuous implementation of the optimal measurement for distinguishing between two non-orthogonal states, and show that feedback control can be used during this measurement to increase the rate at which the information regarding the initial preparation is obtained. We show that while the maximum obtainable increase is modest, the effect is purely quantum mechanical in the sense that the enhancement is only possible when the initial states are non-orthogonal. We find further that the enhancement in the rate of information gain is achieved at the expense of reducing the total information which the measurement can extract in the long-time limit.

Direct Measurement of the Listening of Hearing-Impaired Children

1970 ◽  
Vol 13 (1) ◽  
pp. 65-73 ◽  
Author(s):  
Mary Mira
Keyword(s):  
Direct Measurement ◽  
Continuous Measurement ◽  
Hearing Impaired ◽  
Reinforcement System ◽  
School Aged Children ◽  
Conjugate Reinforcement ◽  
Impaired Children ◽  
Hearing Impaired Children

Listening, a significant dimension of the behavior of hearing-impaired children, may be measured directly by recording childrens' responses to obtain audio narrations programmed via a conjugate reinforcement system. Twelve hearing-impaired, school-aged children responded in varying ways to the opportunity to listen. Direct and continuous measurement of listening has relevance for evaluation of remediation methods and for discovery of variables potentially related to listening.

Continuous measurement of free cortisol profiles

2013 ◽  
pp. 1-1
Author(s):  
Ragini C Bhake ◽  
Jack A Leendertz ◽  
Astrid C E Linthorst ◽  
Stafford L Lightman
Keyword(s):  
Continuous Measurement ◽  
Free Cortisol
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