نتایج جستجو برای: entropy based coherence
تعداد نتایج: 3032478 فیلتر نتایج به سال:
It has recently been claimed that there is significant coherence between the spectral peaks of the global temperature series over the last 160 years and those of the speed of the solar center of mass at periods of 10-10.5, 20-21, 30 and 60-62 years. Here it is shown that these claims are based on a comparison between spectral peaks in spectral estimates that assume that the global temperature d...
In this study, linear and nonlinear electroencephalogram (EEG) changes due to long-term audio-visual stimulation (AVS) were investigated. In the course of 2 months, 25 repetitions of a 20-min AVS program with stimulation frequencies in the range 2-18 Hz were applied to six healthy volunteers. EEG data were recorded from six head locations during relaxed wakefulness prior to AVS. Then linear spe...
Observations of coherent cellular behavior cannot be integrated into widely accepted membrane (pump) theory (MT) and its steady state energetics because of the thermal noise of assumed ordinary cell water and freely soluble cytoplasmic K(+). However, Ling disproved MT and proposed an alternative based on coherence, showing that rest (R) and action (A) are two different phases of protoplasm with...
This article examines cognitive process models of human sentence comprehension based on the idea of informed search. These models are rational in the sense that they strive to find a good syntactic analysis quickly. Informed search derives a new account of garden pathing that handles traditional counterexamples. It supports a symbolic explanation for local coherence as well as an algorithmic ac...
Amplitude amplification is one of primary tools in building algorithms for quantum computers. This technique develops key ideas of the Grover search algorithm. The original formulation by Grover has been reformulated in order to to make building blocks of the algorithm as generally as possible. Potentially useful modifications are connected with changing phases in the rotation operations and re...
Coherence of a quantum state intrinsically depends on the choice of the reference basis. A natural question to ask is the following: if we use two or more incompatible reference bases, can there be some trade-off relation between the coherence measures in different reference bases? We show that the quantum coherence of a state as quantified by the relative entropy of coherence in two or more no...
In recent years, the maximum entropy principle has been applied to a wide range of different fields, often successfully. While these works are usually focussed on cross-disciplinary applications, the point of this letter is instead to reconsider a fundamental point of kinetic theory. Namely, we shall re-examine the Stosszahlansatz leading to the irreversible Boltzmann equation at the light of t...
Abstract. We analyze the coherence properties of polarized neutrons, after they have interacted with a magnetic field undergoing different kinds of statistical fluctuations. We endeavour to probe the degree of disorder of the magnetic field by means of the loss of quantum mechanical coherence of the neutron. We find that the notion of entropy of the field and that of decoherence of the neutron ...
We consider a time-dependent model that describes qubit time-dependently interacting with cavity containing finite entangled pair coherent parametric converter fields. The dynamics of some quantum phenomena, as: phase space information, entanglement and squeezing, are explored by atomic Husimi function, Wehrl entropy, variance, entropy squeezing. influences the unitary qubit-cavity interaction,...
We formulate the Frobenius-norm-based measures for quantum coherence and asymmetry respectively. In contrast to the resource theory of coherence and asymmetry, we construct a natural measure of quantum coherence inspired from optical coherence theory while the group theoretical approach is employed to quantify the asymmetry of quantum states. Besides their simple structures and explicit physica...
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