Enhancing the Remote Distance of LC Passive Wireless Sensors by Parity-Time Symmetry Breaking

2020 ◽  
Vol 13 (6) ◽  
Author(s):  
Bin-Bin Zhou ◽  
Wen-Jun Deng ◽  
Li-Feng Wang ◽  
Lei Dong ◽  
Qing-An Huang
Keyword(s):  
Symmetry Breaking ◽  
Wireless Sensors ◽  
Time Symmetry ◽  
Passive Wireless Sensors

scholarly journals Quantum Zeno effects across a parity-time symmetry breaking transition in atomic momentum space

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Tao Chen ◽  
Wei Gou ◽  
Dizhou Xie ◽  
Teng Xiao ◽  
Wei Yi ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
State Of The Art ◽  
Cold Atom ◽  
Pt Symmetry ◽  
Level System ◽  
Flexible Control ◽  
Time Symmetry ◽  
Symmetry Phase ◽  
Lattice Quantum ◽  
Atomic Momentum

AbstractWe experimentally study quantum Zeno effects in a parity-time (PT) symmetric cold atom gas periodically coupled to a reservoir. Based on the state-of-the-art control of inter-site couplings of atoms in a momentum lattice, we implement a synthetic two-level system with passive PT symmetry over two lattice sites, where an effective dissipation is introduced through repeated couplings to the rest of the lattice. Quantum Zeno (anti-Zeno) effects manifest in our experiment as the overall dissipation of the two-level system becoming suppressed (enhanced) with increasing coupling intensity or frequency. We demonstrate that quantum Zeno regimes exist in the broken PT symmetry phase, and are bounded by exceptional points separating the PT symmetric and PT broken phases, as well as by a discrete set of critical coupling frequencies. Our experiment establishes the connection between PT-symmetry-breaking transitions and quantum Zeno effects, and is extendable to higher dimensions or to interacting regimes, thanks to the flexible control with atoms in a momentum lattice.

scholarly journals Implementation of Simultaneous Multi-Parameter Monitoring Based in LC-Type Passive Wireless Sensing with Partial Overlapping and Decoupling Coils

Sensors ◽  
2019 ◽  
Vol 19 (23) ◽  
pp. 5183
Author(s):  
Juan Ignacio Sancho ◽  
Noemí Perez ◽  
Joaquin De Nó ◽  
Jaizki Mendizabal
Keyword(s):  
Remote Sensing ◽  
Wireless Sensors ◽  
Mutual Coupling ◽  
The Other ◽  
Wireless Sensing ◽  
Passive Wireless Sensors ◽  
Parameter Monitoring

Inductor–capacitor (LC) passive wireless sensors are widely used for remote sensing. These devices are limited in applications where multiparameter sensing is required, because of the mutual coupling between neighboring sensors. This article presents two effective decoupling techniques for multiparameter sensing, based on partially overlapped sensors and decoupling coils, which, when combined, reduce the mutual coupling between sensors to near zero. A multiparameter LC sensor prototype with these two decoupling mechanisms has been designed, simulated, and measured. This prototype is capable of simultaneously measuring four parameters. The measurements demonstrate that the changes in capacitance in one individual sensor do not affect the measurements of the other sensors. This principle has been applied to simultaneous wear sensing using four identical wear sensors.

scholarly journals Manifestation of the spontaneous parity-time symmetry breaking phase transition in hot-electron photodetection based on a tri-layered metamaterial

Nanophotonics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 495-504 ◽  
Author(s):  
Qiang Bai
Keyword(s):  
Phase Transition ◽  
Theoretical Model ◽  
Symmetry Breaking ◽  
Pt Symmetry ◽  
Coupled Mode Theory ◽  
Hot Electron ◽  
Electron Device ◽  
Coupled Mode ◽  
Time Symmetry ◽  
Existence Conditions

AbstractWe theoretically and numerically demonstrate that the spontaneous parity-time (PT) symmetry breaking phase transition can be realized respectively by using two independent tuning ways in a tri-layered metamaterial that consists of periodic array of metal-semiconductor Schottky junctions. The existence conditions of PT symmetry and its phase transition are obtained by using a theoretical model based on the coupled mode theory. A hot-electron photodetection based on the same tri-layered metamaterial is proposed, which can directly show the spontaneous PT symmetry breaking phase transition in photocurrent and possesses dynamical tunability and switchability. This work extends the concept of PT symmetry into the hot-electron photodetection, enriches the functionality of the metamaterial and the hot-electron device, and has varieties of potential and important applications in optoelectronics, photodetection, photovoltaics, and photocatalytics.

Simultaneous Remote Sensing of Temperature and Humidity by LC-Type Passive Wireless Sensors

2015 ◽  
Vol 24 (4) ◽  
pp. 1117-1123 ◽  
Author(s):  
Qing-Ying Ren ◽  
Li-Feng Wang ◽  
Jian-Qiu Huang ◽  
Cong Zhang ◽  
Qing-An Huang
Keyword(s):  
Remote Sensing ◽  
Wireless Sensors ◽  
Temperature And Humidity ◽  
Passive Wireless Sensors

Single-mode laser by parity-time symmetry breaking

Science ◽  
2014 ◽  
Vol 346 (6212) ◽  
pp. 972-975 ◽  
Author(s):  
L. Feng ◽  
Z. J. Wong ◽  
R.-M. Ma ◽  
Y. Wang ◽  
X. Zhang
Keyword(s):  
Symmetry Breaking ◽  
Single Mode ◽  
Mode Laser ◽  
Single Mode Laser ◽  
Time Symmetry
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