Results 61 to 70 of about 1,318,770 (301)
Limits of the formal integrals of motion
Journal of Physics A: Mathematical and TheoreticalAbstract We consider a formal (approximate) integral of motion in Hamiltonians of the form H = 1 2
G Contopoulos, A C Tzemos, F Zanias
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Correlated Charge Transport in an Organic Coulomb Glass
Advanced Materials, EarlyView.ABSTRACT Advances in the development of organic field‐effect transistors (OFETs), electrically gated organic semiconductors (EGOFETs), and organic electrochemical transistors (OECTs) allow for the operation of these devices at very high charge‐carrier densities, where Coulomb interactions between carriers can be expected to become significant.
Magdalena Sophie Dörfler +3 more
wiley +1 more source
Roles of boundary and equation-of-motion terms in cosmological correlation functions
Physics Letters BWe revisit the properties of total time-derivative terms as well as terms proportional to the free equation of motion (EOM) in a Schwinger-Keldysh formalism. They are relevant to the correct calculation of correlation functions of curvature perturbations
Ryodai Kawaguchi +2 more
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Quantization of Free Scalar Fields in the Presence of Natural Cutoffs
Advances in High Energy Physics, 2012 We construct a quantum theory of free scalar fields in (1+1)-dimensions based on the deformed Heisenberg algebra x^,p^=iħ1-βp+2β2p2, that admits the existence of both a minimal measurable length and a maximal momentum, where β is a deformation parameter.
K. Nozari, F. Moafi, F. Rezaee Balef
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Inequivalent representations in the functional integral framework
, 2017 An important feature of Quantum Field Theory is the existence of unitarily inequivalent representations of canonical commutation relations. When one works with the functional integral formalism, it is not clear, however, how this feature emerges.
L Smaldone +5 more
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Advanced Materials, EarlyView.The energetic offset between the donor and the acceptor components in organic photoactive layers is central to the tradeoff between photovoltage and photocurrent losses. This Perspective covers the most important issues surrounding this topic in non‐fullerene acceptor blends, from the difficulty of accurately determining state energies and driving ...
Dieter Neher, Manasi Pranav
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Rethinking Charge Transport and Recombination in Donor‐Diluted Organic Solar Cells
Advanced Materials, EarlyView.Organic solar cells with 1–45% PM6 content in Y12 were studied to link structure and charge dynamics to performance. The conductivity follows a 3D percolation model without a sharp threshold. Donor dilution preserves the photogeneration yield, but limits the fill factor due to transport resistance losses.
Chen Wang +14 more
wiley +1 more source
, 1992 A general integral formalism based on multiple plane wave scattering theory for acousto-optic and holographic Bragg diffraction is developed. The formalism, which is a modification of earlier work, is applicable to dynamic gratings created by sound waves
Chatterjee, Monish Ranjan, Min, S.
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Nonextensive black hole thermodynamics from generalized Euclidean path integral and Wick’s rotation
European Physical Journal C: Particles and FieldsThis paper extends the Euclidean path integral formalism to account for nonextensive thermodynamics. Concretely, we introduce a generalized Wick’s rotation from real time t to imaginary time $$\tau $$ τ such that, $$t\rightarrow -i f_\alpha (\tau )$$ t →
F. Barzi, H. El Moumni, K. Masmar
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Household behavior change for climate change response: an integral scan [PDF]
, 2009 The question of how to successfully facilitate the changes needed to avoid dangerous climate change has become a critical one for researchers and practitioners.
Riedy, C
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