scholarly journals Single-cavity bi-color laser enabled by optical anti-parity-time symmetry

2021 ◽  
Vol 9 (7) ◽  
pp. 1280
Author(s):  
Yao Duan ◽  
Xingwang Zhang ◽  
Yimin Ding ◽  
Xingjie Ni
Keyword(s):  
Time Symmetry ◽  
Single Cavity

Observation of molecular ringing in a single cavity ammonia beam maser

1966 ◽  
Vol 23 (9) ◽  
pp. 557-558 ◽  
Author(s):  
D.C. Lainé
Keyword(s):  
Beam Maser ◽  
Single Cavity

High-order mode-matching-based single-cavity coaxial transducer for broadband measurement of complex permittivity

2013 ◽  
Vol 27 (16) ◽  
pp. 2049-2055
Author(s):  
Fazhong Shen ◽  
Tiancun Hu ◽  
Huan Li ◽  
Jiangtao Huangfu ◽  
Lixin Ran
Keyword(s):  
Complex Permittivity ◽  
High Order Mode ◽  
High Order ◽  
Mode Matching ◽  
Order Mode ◽  
Single Cavity

scholarly journals Observation of anti-parity-time-symmetry, phase transitions and exceptional points in an optical fibre

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Arik Bergman ◽  
Robert Duggan ◽  
Kavita Sharma ◽  
Moshe Tur ◽  
Avi Zadok ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Brillouin Scattering ◽  
Optical Gain ◽  
Single Mode ◽  
Exceptional Point ◽  
Small Scale ◽  
Time Symmetry ◽  
Topological Features ◽  
Gain And Loss ◽  
Exotic Physics

AbstractThe exotic physics emerging in non-Hermitian systems with balanced distributions of gain and loss has recently drawn a great deal of attention. These systems exhibit phase transitions and exceptional point singularities in their spectra, at which eigen-values and eigen-modes coalesce and the overall dimensionality is reduced. So far, these principles have been implemented at the expense of precise fabrication and tuning requirements, involving tailored nano-structured devices with controlled optical gain and loss. In this work, anti-parity-time symmetric phase transitions and exceptional point singularities are demonstrated in a single strand of single-mode telecommunication fibre, using a setup consisting of off-the-shelf components. Two propagating signals are amplified and coupled through stimulated Brillouin scattering, enabling exquisite control over the interaction-governing non-Hermitian parameters. Singular response to small-scale variations and topological features arising around the exceptional point are experimentally demonstrated with large precision, enabling robustly enhanced response to changes in Brillouin frequency shift.

scholarly journals How the amount of cracks and potholes grows with time: Symmetry-based explanation of empirical dependencies

2020 ◽  
Author(s):  
Edgar Daniel Rodriguez Velasquez ◽  
Olga Kosheleva ◽  
Vladik Kreinovich
Keyword(s):  
Time Symmetry

Single-Cavity Three-Color All-Fiber Femtosecond Laser

2021 ◽  
Vol 33 (2) ◽  
pp. 105-108
Author(s):  
Farhad Akhoundi ◽  
N. Peyghambarian
Keyword(s):  
Femtosecond Laser ◽  
Single Cavity

Exceptional point and parity-time symmetry on dipole mie resonances in dimer

2020 ◽  
Author(s):  
Alexey Dmitriev ◽  
Mikhail Rybin
Keyword(s):  
Exceptional Point ◽  
Time Symmetry

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 Novel Hexagonal Dual-Mode Substrate Integrated Waveguide Filter with Source-Load Coupling

2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
Ziqiang Xu ◽  
Gen Zhang ◽  
Hong Xia ◽  
Meijuan Xu
Keyword(s):  
Center Frequency ◽  
Substrate Integrated Waveguide ◽  
Fractional Bandwidth ◽  
Dual Mode ◽  
Transmission Zeros ◽  
Cavity Structure ◽  
Waveguide Filter ◽  
And Performance ◽  
Single Cavity ◽  
Good Agreement

Hexagonal dual-mode cavity and its application to substrate integrated waveguide (SIW) filter are presented. The hexagonal SIW resonator which can combine flexibility of rectangular cavity and performance of circular cavity is convenient for dual-mode bandpass filters design. By introducing coupling between source and load, the filter not only has good selectivity due to two controllable transmission zeros, but also has a small size by the virtue of its single-cavity structure. A demonstration filter with a center frequency of 10 GHz and a 3 dB fractional bandwidth of 4% is designed and fabricated to validate the proposed structure. Measured results are in good agreement with simulated ones.

Determining the state of a single cavity mode from photon statistics

1997 ◽  
Vol 44 (11-12) ◽  
pp. 2427-2439 ◽  
Author(s):  
K. Jacobs ◽  
P. L. Knight ◽  
V. Vedral
Keyword(s):  
Cavity Mode ◽  
The State ◽  
Photon Statistics ◽  
Single Cavity ◽  
Single Cavity Mode

scholarly journals Lasing and Anti-Lasing in a Single Cavity

2017 ◽  
Author(s):  
X. Zhang
Keyword(s):  
Single Cavity
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