33 research outputs found

    Semiclassical String Solutions on 1/2 BPS Geometries

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    We study semiclassical string solutions on the 1/2 BPS geometry of type IIB string theory characterized by concentric rings on the boundary plane. We consider both folded rotating strings carrying nonzero R-charge and circular pulsating strings. We find that unlike rotating strings, as far as circular pulsating strings are concerned, the dynamics remains qualitatively unchanged when the concentric rings replace AdS_5\times S^5. Using the gravity dual we have also studied the Wilson loop of the corresponding gauge theory. The result is qualitatively the same as that in AdS_5\times S^5 in the global coordinates where the corresponding gauge theory is defined on S^3\times R. We show that there is a correction to 1/L leading order behavior of the potential between external objects.Comment: 17 pages, latex file, v2: refs. adde

    Holographic entanglement entropy and mutual information in deformed field theories at finite temperature

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    In this paper we have studied the effect of deformation and temperature on holographic entanglement entropy and mutual information between two subsystems in a deformed field theory at finite temperature. The TTT{\overline{T}} deformation operator in field theory introduces a cut-off in the dual gravity background. We define different regimes of parameters and calculate the entanglement entropy and mutual information analytically. We observe that temperature and deformation parameter have similar effects on entanglement entropy and mutual information. They both lead to decrease in mutual information or somehow the correlation between the two subsystems. Interestingly we observe the emergence of correction terms in entanglement entropy and mutual information that are universal and do not depend on the scale of the non-local operator.Comment: 27 pages, 4 figure

    The investigation of the effects of privatization implementation on the performance of post office: A case study in Guilan General Post Office, Iran

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    The present article aims at the investigation of privatization of Iran Post Office. The emphasis here is placed upon Guilan Province General Post Office. Therefore the main question of the present article is whether the operation of Guilan province General Post Office after the implementation of privatization has improved in comparison with the previous years before it was put into practice or not. The present study is quantitative (survey research) and library data collection in nature

    The investigation of the effects of privatization implementation on the performance of post office: A case study in Guilan General Post Office, Iran

    Get PDF
    The present article aims at the investigation of privatization of Iran Post Office. The emphasis here is placed upon Guilan Province General Post Office. Therefore the main question of the present article is whether the operation of Guilan province General Post Office after the implementation of privatization has improved in comparison with the previous years before it was put into practice or not. The present study is quantitative (survey research) and library data collection in nature
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