68 research outputs found
Quantum Noise and Fluctuations in Gravitation and Cosmology
We give a short update of our research program on nonequilibrium statistical
field theory applied to quantum processes in the early universe and black
holes, as well as the development of stochastic gravity theory as an extension
of semiclassical gravity and an intermediary in the 'bottom-up' approach to
quantum gravity.Comment: 16 pages Latex; small changes in a couple of footnote
Carboxylato bridging Cu(II) coordination polymer: Structure, magnetism and catalytic reduction of nitrophenols
The 1D coordination polymer, [Cu 2 ( ÎŒ2 -OH) 2 (DABA) 2 ] n ( 1 ), (HDABA = 4-Diallylamino-benzoic acid) is characterized by Single crystal X-Ray diffraction analysis. The structure switches to a 2D geometry by hy- drogen bonding interactions. Hand grinding aqueous suspension of the coordination polymer, 1 , present in nano regime of av . 100 nm dimension and shows catalytic performance in the reduction of toxic nitro- phenols to corresponding aminophenols by NaBH 4 . The rate constant values ( Îșapp ) are 2.4 Ă10 â3 (4-NP), 5.3 Ă10 â3 (2,4-DNP) and 5.6 Ă10 â3 (2,4,6-TNP) s â1 are much higher than reduction by only NaBH 4 . The susceptibility measurements ( ÏM T ) of Cu(II) coordination polymer indicates the presence of a very weak antiferromagnetic coupling between the metal centres. The hand grinding technique and reusability of 1 makes the approach chemically green, cost effective and attracts the attention towards the real-life application
MITP Colours in Darkness workshop summary report
This report summarises the talks and discussions that took place over the
course of the MITP Youngst@rs Colours in Darkness workshop 2023. All talks can
be found at https://indico.mitp.uni-mainz.de/event/377/
Cauchy horizon singularity without mass inflation
A perturbed Reissner-Nordstr\"om-de Sitter solution is used to emphasize the
nature of the singularity along the Cauchy horizon of a charged spherically
symmetric black hole. For these solutions, conditions may prevail under which
the mass function is bounded and yet the curvature scalar
diverges.Comment: typeset in RevTex, 13 page
Stochastic Behavior of Effective Field Theories Across Threshold
We explore how the existence of a field with a heavy mass influences the low
energy dynamics of a quantum field with a light mass by expounding the
stochastic characters of their interactions which take on the form of
fluctuations in the number of (heavy field) particles created at the threshold,
and dissipation in the dynamics of the light fields, arising from the
backreaction of produced heavy particles. We claim that the stochastic nature
of effective field theories is intrinsic, in that dissipation and fluctuations
are present both above and below the threshold. Stochasticity builds up
exponentially quickly as the heavy threshold is approached from below, becoming
dominant once the threshold is crossed. But it also exists below the threshold
and is in principle detectable, albeit strongly suppressed at low energies. The
results derived here can be used to give a quantitative definition of the
`effectiveness' of a theory in terms of the relative weight of the
deterministic versus the stochastic behavior at different energy scales.Comment: 32 pages, Latex, no figure
Report of the Topical Group on Cosmic Probes of Dark Matter for Snowmass 2021
Cosmological and astrophysical observations currently provide the only
robust, positive evidence for dark matter. Cosmic probes of dark matter, which
seek to determine the fundamental properties of dark matter through
observations of the cosmos, have emerged as a promising means to reveal the
nature of dark matter. This report summarizes the current status and future
potential of cosmic probes to inform our understanding of the fundamental
nature of dark matter in the coming decade.Comment: Report of the CF3 Topical Group for Snowmass 2021; 35 pages, 10
figures, many references. V3 updates Fig 3-2 and the author lis
Barcoded oligonucleotides ligated on RNA amplified for multiplexed and parallel in situ analyses.
We present barcoded oligonucleotides ligated on RNA amplified for multiplexed and parallel insitu analyses (BOLORAMIS), a reverse transcription-free method for spatially-resolved, targeted, in situ RNA identification of single or multiple targets. BOLORAMIS was demonstrated on a range of cell types and human cerebral organoids. Singleplex experiments to detect coding and non-coding RNAs in human iPSCs showed a stem-cell signature pattern. Specificity of BOLORAMIS was found to be 92% as illustrated by a clear distinction between human and mouse housekeeping genes in a co-culture system, as well as by recapitulation of subcellular localization of lncRNA MALAT1. Sensitivity of BOLORAMIS was quantified by comparing with single molecule FISH experiments and found to be 11%, 12% and 35% for GAPDH, TFRC and POLR2A, respectively. To demonstrate BOLORAMIS for multiplexed gene analysis, we targeted 96 mRNAs within a co-culture of iNGN neurons and HMC3 human microglial cells. We used fluorescence in situ sequencing to detect error-robust 8-base barcodes associated with each of these genes. We then used this data to uncover the spatial relationship among cells and transcripts by performing single-cell clustering and gene-gene proximity analyses. We anticipate the BOLORAMIS technology for in situ RNA detection to find applications in basic and translational research
Reinterpretation of LHC Results for New Physics: Status and recommendations after Run 2
We report on the status of efforts to improve the reinterpretation of searches and measurements at the LHC in terms of models for new physics, in the context of the LHC Reinterpretation Forum. We detail current experimental offerings in direct searches for new particles, measurements, technical implementations and Open Data, and provide a set of recommendations for further improving the presentation of LHC results in order to better enable reinterpretation in the future. We also provide a brief description of existing software reinterpretation frameworks and recent global analyses of new physics that make use of the current data
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