35,558 research outputs found
Science Bots: a Model for the Future of Scientific Computation?
As a response to the trends of the increasing importance of computational
approaches and the accelerating pace in science, I propose in this position
paper to establish the concept of "science bots" that autonomously perform
programmed tasks on input data they encounter and immediately publish the
results. We can let such bots participate in a reputation system together with
human users, meaning that bots and humans get positive or negative feedback by
other participants. Positive reputation given to these bots would also shine on
their owners, motivating them to contribute to this system, while negative
reputation will allow us to filter out low-quality data, which is inevitable in
an open and decentralized system.Comment: WWW 2015 Companion, May 18-22, 2015, Florence, Ital
Reply to the Comment on `Deterministic Single-Photon Source for Distributed Quantum Networking'
Reply to the comment of H. J. Kimble [quant-ph/0210032] on the experiment
realizing a "deterministic single-photon source for distributed quantum
networking" by Kuhn, Hennrich, and Rempe [Phys. Rev. Lett. 89, 067901 (2002),
quant-ph/0204147].Comment: 1 page 1 figur
Phase Diagrams of Three-Component Attractive Ultracold Fermions in One-Dimension
We investigate trions, paired states and quantum phase transitions in
one-dimensional SU(3) attractive fermions in external fields by means of the
Bethe ansatz and the dressed energy formalism. Analytical results for the
ground state energy, critical fields and complete phase diagrams are presented
for weak and strong regimes. Numerical solutions of the dressed energy
equations allow us to examine how the different phase boundaries modify by
varying the inter-component coupling throughout the whole attractive regimes.
The pure trionic phase reduces smoothly by decreasing this coupling until the
weak limit is reached. In this weak regime, a pure BCS-paired phase can be
sustained under certain nonlinear Zeeman splittings. Finally we confirm that
the analytic expressions for the physical quantities and resulting phase
diagrams are highly accurate in the weak and strong coupling regimes.Comment: 12 pages, 3 figures, revised version, accepted in New J. Phy
Transition from antibunching to bunching in cavity QED
The photon statistics of the light emitted from an atomic ensemble into a
single field mode of an optical cavity is investigated as a function of the
number of atoms. The light is produced in a Raman transition driven by a pump
laser and the cavity vacuum [M.Hennrich et al., Phys. Rev. Lett. 85, 4672
(2000)], and a recycling laser is employed to repeat this process continuously.
For weak driving, a smooth transition from antibunching to bunching is found
for about one intra-cavity atom. Remarkably, the bunching peak develops within
the antibunching dip. For saturated driving and a growing number of atoms, the
bunching amplitude decreases and the bunching duration increases, indicating
the onset of Raman lasing.Comment: 4 pages, 4 figure
Summing up Subleading Sudakov Logarithms
We apply the strategy of regions within dimensional regularization to find
functions involved in evolution equations which govern the asymptotic dynamics
of the Abelian form factor and four-fermion amplitude in the SU(N) gauge theory
in the Sudakov limit up to the next-to-leading logarithmic approximation. The
results are used for the analysis of the dominant electroweak corrections to
the fermion-antifermion pair production in the annihilation at high
energy.Comment: 17 pages LaTeX, missprins corrected, references adde
Memory texts and memory work: Performances of memory in and with visual media
The online version of this article can be found at: http://mss.sagepub.com/content/early/2010/05/24/175069801037003
Unifying metastasis--Integrating intravasation, circulation and end organ colonization
Recent technological advances that have enabled the measurement of circulating tumour cells (CTCs) in patients have spurred interest in the circulatory phase of metastasis. Techniques that do not solely rely on a blood sample allow substantial biological interrogation beyond simply counting CTCs
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