scholarly journals Feedback control of probability amplitudes for two-level atom in optical field

2008 ◽  
Vol 281 (4) ◽  
pp. 640-643 ◽  
Author(s):  
Saifullah
Keyword(s):  
Feedback Control ◽  
Optical Field ◽  
Level Atom

Quantum feedback control for qubit-qutrit entanglement

2016 ◽  
Vol 16 (7&8) ◽  
pp. 597-614
Author(s):  
Tiantian Ma ◽  
Jun Jing ◽  
Yi Guo ◽  
Ting Yu
Keyword(s):  
Feedback Control ◽  
Open System ◽  
Control Mechanism ◽  
Initial State ◽  
Level Atom ◽  
Control Scheme ◽  
Quantum Feedback ◽  
Local Feedback ◽  
Quantum Open System ◽  
Different Parts

We study a hybrid quantum open system consisting of two interacting subsystems formed by one two-level atom (qubit) and one three-level atom (qutrit). The quantum open system is coupled to an external environment (cavity) via the qubit-cavity interaction. It is found that the feedback control on different parts of the system (qubit or qutrit) gives dramatically different asymptotical behaviors of the open system dynamics. We show that the local feedback control mechanism acting on the qutrit subsystem is superior than that on the qubit in the sense of improving the entanglement. Particularly, the qutrit-control scheme may result in an entangled steady state, depending on the initial state.

Quantum speed limit time of a two-level atom under different quantum feedback control

2018 ◽  
Vol 27 (1) ◽  
pp. 010303
Author(s):  
Min Yu ◽  
Mao-Fa Fang ◽  
Hong-Mei Zou
Keyword(s):  
Feedback Control ◽  
Speed Limit ◽  
Level Atom ◽  
Quantum Feedback ◽  
Limit Time

scholarly journals Interaction of a two-level atom with single-mode optical field beyond the rotating wave approximation

2014 ◽  
Vol 22 (23) ◽  
pp. 28671 ◽  
Author(s):  
Ju Liu ◽  
Zhi-Yuan Li
Keyword(s):  
Single Mode ◽  
Optical Field ◽  
Rotating Wave Approximation ◽  
Wave Approximation ◽  
Level Atom ◽  
Rotating Wave

scholarly journals Experimental Demonstration of Coherent Feedback Control on Optical Field Squeezing

2012 ◽  
Vol 57 (8) ◽  
pp. 2045-2050 ◽  
Author(s):  
S. Iida ◽  
M. Yukawa ◽  
H. Yonezawa ◽  
N. Yamamoto ◽  
A. Furusawa
Keyword(s):  
Feedback Control ◽  
Optical Field ◽  
Experimental Demonstration

High-performance light transmission based on graphene plasmonic waveguides

2020 ◽  
Vol 8 (20) ◽  
pp. 6832-6838 ◽  
Author(s):  
Da Teng ◽  
Kai Wang ◽  
Qiongsha Huan ◽  
Weiguang Chen ◽  
Zhe Li
Keyword(s):  
High Performance ◽  
Light Transmission ◽  
Optical Field ◽  
Plasmonic Waveguides ◽  
Rib Waveguide

Tunable ultra-deep subwavelength optical field confinement is reported by using a graphene-coated nanowire-loaded silicon nano-rib waveguide.

Use of vent stack temperature as a feedforward variable for dissolver total titratable alkali (TTA) control

TAPPI Journal ◽  
2018 ◽  
Vol 17 (05) ◽  
pp. 261-269
Author(s):  
Wei Ren ◽  
Brennan Dubord ◽  
Jason Johnson ◽  
Bruce Allison
Keyword(s):  
Feedback Control ◽  
Current Practice ◽  
Feedforward Control ◽  
Control Variable ◽  
Indirect Measurement ◽  
Tight Control ◽  
Transfer Lines ◽  
Green Liquor ◽  
Process Dynamics ◽  
Downstream Processes

Tight control of raw green liquor total titratable alkali (TTA) may be considered an important first step towards improving the overall economic performance of the causticizing process. Dissolving tank control is made difficult by the fact that the unknown smelt flow is highly variable and subject to runoff. High TTA variability negatively impacts operational costs through increased scaling in the dissolver and transfer lines, increased deadload in the liquor cycle, under- and over-liming, increased energy consumption, and increased maintenance. Current practice is to use feedback control to regulate the TTA to a target value through manipulation of weak wash flow while simultaneously keeping dissolver density within acceptable limits. Unfortunately, the amount of variability reduction that can be achieved by feedback control alone is fundamentally limited by the process dynamics. One way to improve upon the situation would be to measure the smelt flow and use it as a feedforward control variable. Direct measurement of smelt flow is not yet possible. The use of an indirect measurement, the dissolver vent stack temperature, is investigated in this paper as a surrogate feedforward variable for dissolving tank TTA control. Mill trials indicate that significant variability reduction in the raw green liquor TTA is possible and that the control improvements carry through to the downstream processes.

Sign in / Sign up

Export Citation Format

Share Document