scholarly journals THz/Infrared Double Resonance Two-Photon Spectroscopy of HD+ for Determination of Fundamental Constants

Atoms ◽  
2017 ◽  
Vol 5 (4) ◽  
pp. 38 ◽  
Author(s):  
Florin Constantin
Keyword(s):  
Double Resonance ◽  
Fundamental Constants ◽  
Two Photon

One-photon VUV-MATI and two-photon IR+VUV-MATI spectroscopic determination of oxetane cation ring-puckering vibrations and conformation

2021 ◽  
Vol 154 (5) ◽  
pp. 054308
Author(s):  
Do Won Kang ◽  
Sung Man Park ◽  
Chung Bin Park ◽  
Bong June Sung ◽  
Hong Lae Kim ◽  
...  
Keyword(s):  
Spectroscopic Determination ◽  
Two Photon ◽  
Ring Puckering

Optical frequency determination of the hyperfine components of the two-photon transitions in rubidium

1993 ◽  
Vol 102 (5-6) ◽  
pp. 432-438 ◽  
Author(s):  
F. Nez ◽  
F. Biraben ◽  
R. Felder ◽  
Y. Millerioux
Keyword(s):  
Optical Frequency ◽  
Two Photon ◽  
Frequency Determination

Heuristic determination of the cosmological constant

2021 ◽  
pp. 2150114
Author(s):  
Manuel Urueña Palomo ◽  
Fernando Pérez Lara
Keyword(s):  
Field Theory ◽  
Energy Density ◽  
Cosmological Constant ◽  
Accelerated Expansion ◽  
Fundamental Constants ◽  
Quantum Field ◽  
Brute Force ◽  
Expansion Of The Universe ◽  
The Universe

The vacuum catastrophe results from the disagreement between the theoretical value of the energy density of the vacuum in quantum field theory and the estimated one observed in cosmology. In a similar attempt in which the ultraviolet catastrophe was solved, we search for the value of the cosmological constant by brute-force through computation. We explore combinations of the fundamental constants in physics performing a dimensional analysis, in search of an equation resulting in the measured energy density of the vacuum or cosmological constant that is assumed to cause the accelerated expansion of the universe.

Determination of absolute two-photon excitation cross sections by in situ second-order autocorrelation

1995 ◽  
Vol 20 (23) ◽  
pp. 2372 ◽  
Author(s):  
Chris Xu ◽  
Winfried Denk ◽  
Jeffrey Guild ◽  
Watt W. Webb
Keyword(s):  
Cross Sections ◽  
Second Order ◽  
Two Photon ◽  
Photon Excitation ◽  
Excitation Cross Sections ◽  
Two Photon Excitation

Two-photon excited fluorescent chemosensor for homogeneous determination of copper(ii) in aqueous media and complicated biological matrix

The Analyst ◽  
2011 ◽  
Vol 136 (10) ◽  
pp. 2139 ◽  
Author(s):  
Lingzhi Liu ◽  
Xiaohu Dong ◽  
Yan Xiao ◽  
Wenlong Lian ◽  
Zhihong Liu
Keyword(s):  
Aqueous Media ◽  
Fluorescent Chemosensor ◽  
Biological Matrix ◽  
Two Photon ◽  
Determination Of Copper
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