Browsing Physics and Astronomy Publications by Title
Now showing items 828847 of 1345

Quantitative analysis of gas phase molecular constituents using frequencymodulated rotational spectroscopy
(2019)Rotational spectroscopy has been used for decades for virtually unambiguous identification of gas phase molecular species, but it has rarely been used for the quantitative analysis of molecular concentrations. Challenges ... 
Quantitative comparison of adaptive sampling methods for protein dynamics
(2018)Adaptive sampling methods, often used in combination with Markov state models, are becoming increasingly popular for speeding up rare events in simulation such as molecular dynamics (MD) without biasing the system dynamics. ... 
Quantum critical dynamics for a prototype class of insulating antiferromagnets
(2018)Quantum criticality is a fundamental organizing principle for studying strongly correlated systems. Nevertheless, understanding quantum critical dynamics at nonzero temperatures is a major challenge of condensedmatter ... 
Quantum critical point in the Scdoped itinerant antiferromagnet TiAu
(2017)We present an experimental realization of a quantum critical point in an itinerant antiferromagnet composed of nonmagnetic constituents, TiAu. By partially substituting Ti with Sc in Ti 1 − x Sc x Au , a doping ... 
Quantum criticality in the pseudogap BoseFermi Anderson and Kondo models: Interplay between fermion and bosoninduced Kondo destruction
(2013)We address the phenomenon of critical Kondo destruction in pseudogap BoseFermi Anderson and Kondo quantum impurity models. These models describe a localized level coupled both to a fermionic bath having a density of states ... 
Quantum effects and nonlocality in strongly coupled plasmonic nanowire dimers
(2013)Using a fully quantum mechanical approach we study the optical response of a strongly coupled metallic nanowire dimer for variable separation widths of the junction between the nanowires. The translational invariance of ... 
Quantum jumps via spontaneous Raman scattering
(1987)A single laser, which is used to induce and detect spontaneous Raman transitions, can be used to observe quantum jumps in a single atom. The population dynamics of a particular system, consisting of two S1/22 groundstate ... 
Quantum mechanical effects in plasmonic structures with subnanometre gaps
(2016)Metallic structures with nanogap features have proven highly effective as building blocks for plasmonic systems, as they can provide a wide tuning range of operating frequencies and large nearfield enhancements. Recent ... 
Quantum Multicriticality near the DiracSemimetal to BandInsulator Critical Point in Two Dimensions: A Controlled Ascent from One Dimension
(2018)We compute the effects of generic shortrange interactions on gapless electrons residing at the quantum critical point separating a twodimensional Dirac semimetal and a symmetrypreserving band insulator. The electronic ... 
Quantum Phases of the ShastrySutherland Kondo Lattice: Implications for the Global Phase Diagram of HeavyFermion Metals
(2014)Considerable recent theoretical and experimental effort has been devoted to the study of quantum criticality and novel phases of antiferromagnetic heavyfermion metals. In particular, quantum phase transitions have been ... 
Quantum plasmonics: Symmetrydependent plasmonmolecule coupling and quantized photoconductances
(2012)We investigate photoinduced electron transport through nanoparticle dimers connected by linear and ringlike molecules. The two model junctions exhibit similar absorption but distinct photoconductance. The linearchain junction ... 
Quantum quench phase diagrams of an swave BCSBEC condensate
(2015)We study the dynamic response of an swave BCSBEC (atomicmolecular) condensate to detuning quenches within the twochannel model beyond the weakcoupling BCS limit. At long times after the quench, the condensate ends up ... 
Quasiparticle coupled cluster theory for pairing interactions
(2014)We present an extension of the pair coupled cluster doubles (pCCD) method to quasiparticles and apply it to the attractive pairing Hamiltonian. Near the transition point where number symmetry gets spontaneously broken, ... 
Quasispecies theory for evolution of modularity
(2015)Biological systems are modular, and this modularity evolves over time and in different environments. A number of observations have been made of increased modularity in biological systems under increased environmental ... 
QuenchInduced Floquet TopologicalﾠpWave Superfluids
(2014)Ultracold atomic gases in two dimensions tuned close to a pwave Feshbach resonance were expected to exhibit topological superfluidity, but these were found to be experimentally unstable. We show that one can induce a ... 
RACIPE: a computational tool for modeling gene regulatory circuits using randomization
(2018)BACKGROUND: One of the major challenges in traditional mathematical modeling of gene regulatory circuits is the insufficient knowledge of kinetic parameters. These parameters are often inferred from existing experimental ... 
Radiation testing of electronics for the CMS endcap muon system
(2013)The electronics used in the data readout and triggering system for the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) particle accelerator at CERN are exposed to high radiation levels. This ... 
Radiative Decay Rates in Hg+ from Observations of Quantum Jumps in a Single Ion
(1987)Radiative decay rates connecting the lowest four energy levels of Hg+198 have been derived solely from an analysis of the fluctuations (quantum jumps) of the laserinduced fluorescence of the 194nm first resonance transition ... 
Radiative lifetime of the 2P state of lithium
(1996)We determine the radial dipole moment between the 2S and 2P states of atomic lithium by analyzing the longrange vibrational eigenenergies of the singly excited diatomic molecule. The result can be expressed in terms of ... 
Raman scattering study of NaFe0.53Cu0.47As
(2018)We use polarizationresolved Raman scattering to study lattice dynamics in NaFe0.53Cu0.47As single crystals. We identify four A1g phonon modes, at 126, 172, 183, and 197 cm−1, and four B3g phonon modes at 101, 139, 173, ...