693 research outputs found

    The Mirror Universes

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    In this paper we investigate the structure of the Mirror Universes. The two universes are coupled with transformation t to -t. It is shown that for Planck scale the oscillations of temperature of the universes are observed. For the Mirror Universes the temperature fields are shifted in phase. Key words: Gravity; Universe temperature; Oscillation of temperature.Comment: 2 pages, 2 figure

    Anthropic calculation of the velocity and acceleration of the space-time

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    In this paper considering quantum heat transport equation (QHT) formulated in our earlier papers the temperature for universes with G < 0 is calculated. As the solution of complex QHT (Schrodinger type equation), the temperature is complex also. We argue that due to anthropic limitation of the observer ImT(r,t)=0 From this condition the discretization of space-time radius R, velocity of the universe expansion v, Hubble parameter H and acceleration of the expansion a are calculated. The agreement with observational data for our Universe is quite good. PACS 98.62.Py PACS 98.80.Bp PACS 98.80.CqComment: 7pg

    On the hyperbolic Pennes equation description of the heat pulse-human cornea interaction

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    In this paper laser heating of human cornea is investigated. The new heat transport equation in cornea -hyperbolic Pennes equation is formulated and solved. It is shown that for ultra-short laser pulses the thermal energy propagates with finite velocity whereas for parabolic Pennes equation velocity is infiniteComment: 20 pgs 8 figs. arXiv admin note: substantial text overlap with arXiv:0805.0436, arXiv:0706.0011, and with gr-qc/0111112 and arXiv:gr-qc/0102026 by other authors without attributio

    Sub- and Supersonic Heat Motion Induced by Femtosecond Laser Pulses

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    In this paper the superheating of electron plasma by femtosecond laser pulses is investigated. With Heaviside thermal equation (Lasers in Engineering, 12, (2002), p.17) the generation of superhot electrons is described. It is shown that in hot electron plasma (i.e. with electron energies >5MeV) the thermal shock waves can be generated. Key words: Femtosecond laser pulses; Hot electron plasma; Shock thermal waves.Comment: 11 pages, 11 figure

    Thermal processes generated in quark-gluon plasma by yoctosecond laser pulses

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    In this paper the thermal processes generated by yoctosecond (10-24 s) laser pulses in QGP are investigated. Considering that the relaxation time in QGP is of the order of 1 ys it is shown that in QGP the yoctosecond laser pulses can generate the thermal waves with velocity v = c (0.3 fm/ys). Key words: QGP, thermal waves, yoctosecond pulsesComment: 12pg

    Weyl equation for temperature fields induced by attosecond laser pulses

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    In this paper the Weyl equation for temperature field induced by laser beam interaction with matter is proposed and solved. Depending on the scattering mechanism the temperature field oscillate or is damped. Key words: Thermal processes, Weyl equationComment: 9 page

    On the attosecond laser pulse tissue interaction

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    In this paper the attosecond laser pulse tissue is investigated. The master equation is formulated and solved. The thermal relaxation time and thermal waves speed are calculate

    Beyond the Fourier Equation: Quantum Hyperbolic Heat Transport

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    In this paper the quantum limit of heat transport induced by ultrashort laser pulses is discussed. The new quantum heat transport equation is derived. The relaxation time tau and diffusion coefficient D^e are calculated.Comment: 8 page

    Scaling law in thermal phenomena

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    In this paper the scaling law for the relaxation times in thermal phenomena is investigated. It is shown that dependent on the value of the parameter K=E/m(c\alpha)^2,where E is the energy which is delivered to the system, m is the parton mass and \alpha=1/137 for electromagnetic interaction and \alpha=0.16 for strong interaction respectively, heat transport is diffusive, for K1. For the system with N partons the relaxation time is scaled as \tau^N\to N (\hbar/(mc\alpha)^2). Key words: Thermal phenomena, scalingComment: 7 page

    Pi-meson as the quanta of non-newtonian hadronic fluid

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    It occurs that when we attempt to melt the nucleon in order to obtain the free quark gas, or QGP fluid the mass of the heat quantum (heaton) is equal to the pi-meson mass. Key words: Heat quanta; Quantum heat transport; Quantum diffusion coefficient.Comment: 10 page
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