101 research outputs found
Absence of jump discontinuity in the magnetization in quasi-one-dimensional random-field Ising models
No full textRestricted Access. An open-access version is available at arXiv.org (one of the alternative locations)We consider the zero-temperature random-field Ising model in the presence of an external field, on ladders and in one dimension with finite range interactions, for unbounded continuous distributions of random fields, and show that there is no jump discontinuity in the magnetizations for any quasi-one-dimensional model. We show that the evolution of the system at an external field can be described by a stochastic matrix and the magnetization can be obtained using the eigenvector of the matrix corresponding to the eigenvalue one, which is continuous and differentiable function of the external field
Heat and work fluctuations for a harmonic oscillator
No full textOpen Access.The formalism of Kundu [J. Stat. Mech.1742-546810.1088/1742-5468/2011/03/P03007 P03007 (2011)], for computing the large deviations of heat flow in harmonic systems, is applied to the case of single Brownian particle in a harmonic trap and coupled to two heat baths at different temperatures. The large-τ form of the moment generating function <e-λQ>≈g(λ)exp[τμ(λ)], of the total heat flow Q from one of the baths to the particle in a given time interval τ, is studied and exact explicit expressions are obtained for both μ(λ) and g(λ). For a special case of the single particle problem that corresponds to the work done by an external stochastic force on a harmonic oscillator coupled to a thermal bath, the large-τ form of the moment generating function is analyzed to obtain the exact large deviation function as well as the complete asymptotic forms of the probability density function of the work
Statistical properties of single-file diffusion front
No full text4 revtex pagesInternational audienceStatistical properties of the front of a semi-infinite system of single-file diffusion (one dimensional system where particles cannot pass each other, but in-between collisions each one independently follow diffusive motion) are investigated. Exact as well as asymptotic results are provided for the probability density function of (a) the front-position, (b) the maximum of the front-positions, and (c) the first-passage time to a given position. The asymptotic laws for the front-position and the maximum front-position are found to be governed by the Fisher-Tippett-Gumbel extreme value statistics. The asymptotic properties of the first-passage time is dominated by a stretched-exponential tail in the distribution. The farness of the front with the rest of the system is investigated by considering (i) the gap from the front to the closest particle, and (ii) the density profile with respect to the front-position, and analytical results are provided for late time behaviors
Degeneracy between θ23 octant and neutrino non-standard interactions at DUNE
No full textAbstractWe expound in detail the degeneracy between the octant of θ23 and flavor-changing neutral-current non-standard interactions (NSI's) in neutrino propagation, considering the Deep Underground Neutrino Experiment (DUNE) as a case study. In the presence of such NSI parameters involving the e−μ (εeμ) and e−τ (εeτ) flavors, the νμ→νe and ν¯μ→ν¯e appearance probabilities in long-baseline experiments acquire an additional interference term, which depends on one new dynamical CP-phase ϕeμ/eτ. This term sums up with the well-known interference term related to the standard CP-phase δ creating a source of confusion in the determination of the octant of θ23. We show that for values of the NSI coupling (taken one at-a-time) as small as few% (relative to the Fermi coupling constant GF), and for unfavorable combinations of the two CP-phases δ and ϕeμ/eτ, the discovery potential of the octant of θ23 gets completely lost
Towards Sub-regional cooperation: India’s Northeast and Bangladesh
No full textThe South Asian countries have a shared past based on deep-rooted common cultural heritage and historical legacy. The region has demographic and geographical advantages young labour force and a contiguous border. The spatial dimension of regional integration of Northeast India and Bangladesh can be inferred from the historical fact that economic growth of Northeast during the British rule flourished essentially on the strength of its integrated transport network through East Bengal. Inland-water trade between India and Bangladesh is important in linking not only Assam but the region as a whole to Bangladesh. Cost effective trade routes through water ways is more important than land routes for India’s Northeast through the corridors of Bangladesh. Notwithstanding the importance of waterways, the land routes continue to be the safe transit for informal trade between both the countries.Regional cooperation; Northeast India
Publisher's Note: Stochastic efficiency of an isothermal work-to-work converter engine [Phys. Rev. E <b>96</b> , 042130 (2017)]
No full textFluctuation theorem for entropy production of a partial system in the weak-coupling limit
No full textSmall systems in contact with a heat bath evolve by stochastic dynamics. Here we show that, when one such small system is weakly coupled to another one, it is possible to infer the presence of such weak coupling by observing the violation of the steady-state fluctuation theorem for the partial entropy production of the observed system. We give a general mechanism due to which the violation of the fluctuation theorem can be significant, even for weak coupling. We analytically demonstrate on a realistic model system that this mechanism can be realized by applying an external random force to the system. In other words, we find a new fluctuation theorem for the entropy production of a partial system, in the limit of weak coupling
Correction to: The Small GTPase RAC1/CED-10 Is Essential in Maintaining Dopaminergic Neuron Function and Survival Against α-Synuclein-Induced Toxicity
No full textWith the author(s)’ decision to opt for Open Choice the copyright of the article changed on March 2018 to © The Author(s) 2018 and the name of one of the author was changed to “Sanjib Guha”.</jats:p
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