162 research outputs found

    Supplementary data for article: Blagojević, J. P.; Zarić, S. D. Stacking Interactions of Hydrogen-Bridged Rings-Stronger than the Stacking of Benzene Molecules. Chemical Communications 2015, 51 (65), 12989ā€“12991. https://doi.org/10.1039/c5cc04139b

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    Supplementary material for: [https://doi.org/10.1039/c5cc04139b]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/1747]Related to accepted version: [http://cherry.chem.bg.ac.rs/handle/123456789/3424

    Covariant description of the black hole entropy in 3D gravity

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    We study the entropy of the black hole with torsion using the covariant form of the partition function. The regularization of infinities appearing in the semiclassical calculation is shown to be consistent with the grand canonical boundary conditions. The correct value for the black hole entropy is obtained provided the black hole manifold has two boundaries, one at infinity and one at the horizon. However, one can construct special coordinate systems, in which the entropy is effectively associated with only one of these boundaries.Comment: 12 pages, LaTeX, v2: new material in section IV clarifies the effects pertaining to the use of different coordinate system

    Black hole entropy in 3D gravity with torsion

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    The role of torsion in quantum three-dimensional gravity is investigated by studying the partition function of the Euclidean theory in Riemann-Cartan spacetime. The entropy of the black hole with torsion is found to differ from the standard Bekenstein-Hawking result, but its form is in complete agreement with the first law of black hole thermodynamics.Comment: 17 pages, RevTeX, minor revision

    Š”тŠµŠŗŠøŠ½Š³ ŠøŠ½Ń‚ŠµŃ€Š°ŠŗцŠøјŠµ ŠæрстŠµŠ½Š¾Š²Š° фŠ¾Ń€Š¼ŠøрŠ°Š½Šøх Š²Š¾Š“Š¾Š½ŠøчŠ½ŠøŠ¼ Š²ŠµŠ·ŠøŠ²Š°ŃšŠµŠ¼ ŠæŠ¾Ń‚ŠæŠ¾Š¼Š¾Š³Š½ŃƒŃ‚ŠøŠ¼ рŠµŠ·Š¾Š½Š°Š½Ń†ŠøјŠ¾Š¼

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    Resonance-assisted hydrogen-bridged rings are often found in crystal structures in parallel alignment; 44% of all crystal structuresfound in Cambridge structural database, that contain this ring type, form parallel contacts. Distances betw een ring planes are typical for stacking (3.0-4.0 ƅ) and rings are in anti orientation. Quantum chemical calculations of th e stacking interaction energies are performed using different methods that are in good agreement with CCSD(T)/CBS methods, on model systems composed on dimers of molecules whose derivatives are the most common in crystal structures. The stro ngest calculated interactions (up to -5.1 kcal/mol) are comparable with stacking interactions of saturated hydrogen-bridged rings (-4.9 kcal/mol [1]) and stacking interactions between saturated hydrogen-bridged rings and C6-aromatic rings (-4.4 kcal/mol [2]), as well as with hydrogen bonds between water molecules (-4.8 kcal/mol [3]). Results indicate that energies of stack ing interactions of resonance-assisted hydrogen-bridged rings are not substantially different than energies of stacking interactions between saturated hydrogen-bridged rings

    Canonical approach to 2D WZNW model, non-abelian bosonization and anomalies

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    The gauged WZNW model has been derived as an effective action, whose Poisson bracket algebra of the constraints is isomorphic to the commutator algebra of operators in quantized fermionic theory. As a consequence, the hamiltonian as well as usual lagrangian non-abelian bosonization rules have been obtained, for the chiral currents and for the chiral densities. The expression for the anomaly has been obtained as a function of the Schwinger term, using canonical methods.Comment: RevTex, 23 page

    Supplementary material for the article: Blagojević, J. P.; Veljković, D.; Zarić, S. D. Stacking Interactions between Hydrogen-Bridged and Aromatic Rings: Study of Crystal Structures and Quantum Chemical Calculations. CrystEngComm 2017, 19 (1), 40ā€“46. https://doi.org/10.1039/c6ce02045c

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    Supplementary material for:[https://doi.org/10.1039/c6ce02045c ]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/2380]Related to accepted version: [http://cherry.chem.bg.ac.rs/handle/123456789/3246

    Supplementary material for the article: Blagojević, J. P.; Veljković, D.; Zarić, S. D. Stacking Interactions between Hydrogen-Bridged and Aromatic Rings: Study of Crystal Structures and Quantum Chemical Calculations. CrystEngComm 2017, 19 (1), 40ā€“46. https://doi.org/10.1039/c6ce02045c

    Get PDF
    Supplementary material for:[https://doi.org/10.1039/c6ce02045c ]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/2380]Related to accepted version: [http://cherry.chem.bg.ac.rs/handle/123456789/3246

    2D Induced Gravity as an Effective WZNW System

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    We introduced a dynamical system given by a difference of two simple SL(2,R) WZNW actions in 2D, and defined the related gauge theory in a consistent way. It is shown that gauge symmetry can be fixed in such a way that, after integrating out some dynamical variables in the functional integral, one obtains the induced gravity action.Comment: LaTeX, 16 page
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