Results 51 to 60 of about 377,173 (291)
Two-photon transitions in hydrogen and cosmological recombination
, 2007 We study the two-photon process for the transitions ns --> 1s and nd --> 1s in hydrogen up to large n. For n2) likely do not reach the percent-level. For conservative assumptions we find a correction DN_e/N_e~-0.4% at redshift z~1160. This is numerically
Chluba, J., Sunyaev, R. A.
core +2 more sources
Two-photon diffraction and quantum lithography [PDF]
, 2001 We report a proof-of-principle experimental demonstration of quantum lithography. Utilizing the entangled nature of a two-photon state, the experimental results have bettered the classical diffraction limit by a factor of two.
A. Einstein +15 more
core +2 more sources
Two-photon Rabi oscillations [PDF]
Physical Review A, 1996 Rabi oscillations reflect the existence of a coherent superposition of two molecular eigenstates during the interaction of molecules with a strong, resonant electromagnetic field. This phenomenon is not restricted to two-level systems. We demonstrate its occurrence in a three-level system where the radiation induces a two-photon absorption.
Linskens, A.F. +3 more
openaire +3 more sources
Molecular design strategy to alleviate environmental interference on two-photon fluorescence probes
Cell Reports Physical Science, 2021 Summary: Electron donor-acceptor (D-A)-type molecules are the most widely employed two-photon scaffolds. Unfortunately, current D-A-type fluorophores suffer from serious solvent-dependent emission wavelength and brightness, thwarting their use for high ...
Xingxing Zhang +7 more
doaj +1 more source
Molecular Oncology, EarlyView.Loss of the miR‐214/199a cluster is associated with recurrence in ovarian cancer. Engineered small extracellular vesicles (m214‐sEVs) elevate miR‐214‐3p/miR‐199a‐5p in tumor cells, suppress β‐catenin, TLR4, and YKT6 signaling, reprogram tumor‐derived sEV cargo, reduce chemoresistance and migration, and enhance carboplatin efficacy and survival in ...
Weida Wang +12 more
wiley +1 more source
One- and two-photon scattering from generalized V-type atoms [PDF]
, 2016 The one- and two-photon scattering matrix S is obtained analytically for a one-dimensional waveguide and a point-like scatterer with N excited levels (generalized V -type atom).
García-Ripoll, Juan José +3 more
core +4 more sources
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering SciencesWe discuss two-photon physics, taking for illustration the particular but topical case of resonance fluorescence. We show that the basic concepts of interferences and correlations provide at the two-photon level an independent and drastically different picture than at the one-photon level, with landscapes of correlations that reveal various processes ...
E. Zubizarreta Casalengua +2 more
openaire +4 more sources
Molecular Oncology, EarlyView.We have established a humanized orthotopic patient‐derived xenograft (Hu‐oPDX) mouse model of high‐grade serous ovarian cancer (HGSOC) that recapitulates human tumor–immune interactions. Using combined anti‐PD‐L1/anti‐CD73 immunotherapy, we demonstrate the model's improved biological relevance and enhanced translational value for preclinical ...
Luka Tandaric +10 more
wiley +1 more source
MEMS Actuators for Optical Microendoscopy
Micromachines, 2019 Growing demands for affordable, portable, and reliable optical microendoscopic imaging devices are attracting research institutes and industries to find new manufacturing methods.
Zhen Qiu, Wibool Piyawattanametha
doaj +1 more source
Multipath Entanglement of Two Photons [PDF]
Physical Review Letters, 2009 We present a novel optical device based on an integrated system of micro-lenses and single mode optical fibers. It allows to collect and direct into many modes two photons generated by spontaneous parametric down conversion. By this device multiqubit entangled states and/or multilevel qu-$d$it states of two photons, encoded in the longitudinal momentum
ROSSI A +4 more
openaire +6 more sources