Results 251 to 260 of about 6,877,003 (306)
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Phase control of the Pancharatnam phase
Physical Review A, 2009We propose a method to control the atomic dynamics in the presence of electromagnetic fields. Instead of measuring the population dynamics, we focus on the possibility of controlling the Pancharatnam phase. For a two-level system we find that this phase can be optically induced and controlled by the phase shift.
Bouchene, M. A., Abdel-Aty, M.
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2017
We saw in the preceding chapter how diodes can be used to rectify an ac input voltage to produce an uncontrolled dc output. These circuits—whether half-wave or full-wave configurations under resistive, inductive, or capacitive loads—have one common feature: The level of the output voltage is a function only of the circuit parameters and the peak ...
Issa Batarseh, Ahmad Harb
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We saw in the preceding chapter how diodes can be used to rectify an ac input voltage to produce an uncontrolled dc output. These circuits—whether half-wave or full-wave configurations under resistive, inductive, or capacitive loads—have one common feature: The level of the output voltage is a function only of the circuit parameters and the peak ...
Issa Batarseh, Ahmad Harb
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Quantum Phase Control of Entanglement
Physical Review Letters, 2004A method of phase control of entanglement in two-qubit systems is proposed. We show that by changing a relative phase of the pulses that drive the transitions in a two-qubit system with closed-loop couplings, one can control entanglement at will. The method relies on adiabatic dynamics via time-delayed pulse sequences and can be implemented with both ...
Vladimir S, Malinovsky, Ignacio R, Sola
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1986
One of the simplest single-phase ac phase-control circuits is shown in Fig. 9–1. The voltage impressed on the load is controlled by changing the phase-control angle α. Usually a symmetrical output is required so that each SCR is gated at the same α. Of course, a given SCR is gated only on alternate half-cycles.
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One of the simplest single-phase ac phase-control circuits is shown in Fig. 9–1. The voltage impressed on the load is controlled by changing the phase-control angle α. Usually a symmetrical output is required so that each SCR is gated at the same α. Of course, a given SCR is gated only on alternate half-cycles.
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2003
Diese Phase des Prozessmanagements ist im Unternehmen immerwahrend aktiv und schafft durch die kontinuierliche Uberwachung der Prozesse die Voraussetzung fur das unmittelbare Erkennen von Schwachstellen. Die ersten vier Phasen werden nur aktiviert, wenn in der Controllingphase Defizite erkannt worden sind, die auf Verbesserungsbedarf oder ...
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Diese Phase des Prozessmanagements ist im Unternehmen immerwahrend aktiv und schafft durch die kontinuierliche Uberwachung der Prozesse die Voraussetzung fur das unmittelbare Erkennen von Schwachstellen. Die ersten vier Phasen werden nur aktiviert, wenn in der Controllingphase Defizite erkannt worden sind, die auf Verbesserungsbedarf oder ...
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All-optical phase-controlled phase modulators
Journal of the Optical Society of America BIn this study, we aim to develop an all-optical, phase-controlled modulator composed of lasers, optical directional couplers, optical amplifiers, and phase shifters. By employing a two-layer multilayer perceptron with matrix inversion, we determine the coupling ratios of the directional couplers and the phase delays of the phase shifters.
Da-You Ni +2 more
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Phase Control of Neural Pacemakers
Science, 1977An electrical stimulus resets the phase of a spontaneously rhythmic neuron. The "new phase" versus "old phase" curve shows either of two distinct topological characters, depending on the stimulus magnitude. These features, and a phase singularity implicit in them, are common to many stable oscillations deriving from continuous feedback between two or ...
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1979
Abstract : This report summarizes progress toward a solution to the problem of HEL control-loop instability in the presence of thermal blooming. Current phase-control-loop structure is analyzed, and a dual-loop structure is proposed. A correspoding closed-loop phase-compensation control algorithm is also proposed, and its fundamental requirements ...
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Abstract : This report summarizes progress toward a solution to the problem of HEL control-loop instability in the presence of thermal blooming. Current phase-control-loop structure is analyzed, and a dual-loop structure is proposed. A correspoding closed-loop phase-compensation control algorithm is also proposed, and its fundamental requirements ...
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Phase transitions in 2D materials
Nature Reviews Materials, 2021Wenbin Li, Xiaofeng Qian, Ju Li
exaly