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1.
In this paper the quantum heat transport in a Planck gas in the presence of the potential (other than the thermal one) is investigated. The new quantum heat transport equation which generalizes our potential-free QHT is developed. The thermal wave solution of QHT for a Planck gas is obtained and a condition for distortionless propagation of thermal wave is formulated. It is argued that the initial conditions of the Beginning (i.e., at t=0) are smeared in the time scale of the Planck time. 相似文献
2.
Bipin Singh Koranga Rajesh Pandey 《International Journal of Theoretical Physics》2011,50(5):1468-1473
Neutrino mixing lead to a non zero contribution to the dark energy of the universe. We assume that the neutrino masses and
mixing arise through physics at a scale intermediate between Planck Scale and the electroweak scale. The mechanism of neutrino
mixing is a possible candidate to contribute the cosmological dark energy. Quantum gravitational (Planck scale) effects lead
to an effective SU(2)
L
×U(1) invariant dimension-5 Lagrangian involving neutrino and Higgs fields, which gives rise to additional terms in neutrino
mass matrix. There additional term can be considered to be perturbation of the GUT scale bi-maximal neutrino mass matrix.
We assume that the gravitational interaction is flavor. In this paper, we discuss the three flavor neutrino mixing and cosmological
dark energy contributes due to Planck scale effects. 相似文献
3.
4.
In this paper the quantum heat transport equation (QHT) is applied to the study of thermal properties of Planck gas, i.e.,
a gas of massive particles with mass equal to the Planck massM
P
= (łc/G)1/2 and whose relaxation time equals the Planck timeτ
p
= (łG/c
5)1/2. The quantum of thermal energy for a Planck gas,E
Planck = 1019GeV, and the quantum thermal diffusion coefficientD
Planck = (ħG/c)1/2 are calculated. Within the framework of QHT the thermal phenomena in a Planck gas can be divided into two classes: for a
time period shorter thanτ
p
, the time reversal symmetry holds and for a time period longer thanτ
p
, time symmetry is broken, i.e., a time arrow is created. 相似文献
5.
基于Majhi等人最近的工作,利用狄拉克方程,在半经典近似外讨论了Kerr-Newman黑洞的熵修正.在单位制G=c=kB=1下,由于普朗克常数与普朗克长度,普朗克质量和普朗克电荷的平方成正比,作用量的量子修正项与半经典项的比例常数被选为(Mrh-Q2/2)-1.结合视界方程的微分形式和黑洞热力学第一定律,本文得到了荷电稳态黑洞的修正熵并发现修正项同样包括Bekenstein-Hawking熵的对数项和倒数项. 相似文献
6.
Demokrit – Planck A branch of physics exists closely linked to the constant h and associated with atomism. It is this h-physics that Planck originated. But atomism like existence of localized, charged particles with different masses does not follow from this physics, especially the charge quant. Hence Demokrit asserted more then quantum physics is competent to answer. 相似文献
7.
Bipin Singh Koranga 《International Journal of Theoretical Physics》2011,50(1):42-47
We consider non renormalization 1/M
x
interaction term as a perturbation of the neutrino mass matrix. We find that for the degenerate neutrino mass spectrum. We
assume that the neutrino masses and mixing arise through physics at a scale intermediate between Planck Scale and the electroweak
scale. We also assume, above the electroweak breaking scale, neutrino masses are nearly degenerate and their mixing is bimaximal.
The perturbation generates a non zero value of θ
13, which is within reach of the high performance neutrino factory. In this paper, we find that the non zero value of θ
13 due to Planck scale effects indicates the possibility of CP violation. 相似文献
8.
Yu-Quan Yuan Xiao-Xiong Zeng Zhi-Jian Zhou Liang-Ping Jin 《General Relativity and Gravitation》2009,41(12):2771-2780
Recently, fermions tunneling beyond semiclassical approximation from an uncharged static black hole was investigated by Majhi,
which was based on the work of Banerjee and Majhi, it was found that the black hole entropy correction can be produced as
the quantum effect of a particle is taken into account. In this paper, we further extend this idea to the stationary Kerr
black hole to discuss its entropy correction. To get the corrections correctly, the proportionality parameters of quantum
corrections of action I
i
to the semiclassical action I
0 in this case are regarded as the inverse of the product of Planck Length and Planck Mass. The result shows that entropy corrections
to the stationary black hole also include the logarithmic term and inverse area term in Bekenstein–Hawking entropy beyond
semiclassical approximation. 相似文献
9.
An extended scale relativity theory, actively developed by one of the authors, incorporates Nottale's scale relativity principle where the Planck scale is the minimum impassible invariant scale in Nature, and the use of polyvector-valued coordinates in C-spaces (Clifford manifolds) where all lengths, areas, volumes are treated on equal footing. We study the generalization of the ordinary point-particle quantum mechanical oscillator to the p-loop (a closed p-brane) case in C-spaces. Its solution exhibits some novel features: an emergence of two explicit scales delineating the asymptotic regimes (Planck scale region and a smooth region of a quantum point oscillator). In the most interesting Planck scale regime, the solution recovers in an elementary fashion some basic relations of string theory (including string tension quantization and string uncertainty relation). It is shown that the degeneracy of the first collective excited state of the p-loop oscillator yields not only the well-known Bekenstein–Hawking area-entropy linear relation but also the logarithmic corrections therein. In addition we obtain for any number of dimensions the Hawking temperature, the Schwarschild radius, and the inequalities governing the area of a black hole formed in a fusion of two black holes. One of the interesting results is a demonstration that the evaporation of a black hole is limited by the upper bound on its temperature, the Planck temperature. 相似文献
10.
Anomalous diffusion is one of the most ubiquitous phenomena in nature, and it is present in a wide variety of physical situations, for instance, transport of fluid in porous media, diffusion of plasma, diffusion at liquid surfaces, etc. The fractional approach proved to be highly effective in a rich variety of scenarios such as continuous time random walk models, generalized Langevin equations, or the generalized master equation. To investigate the subdiffusion of anomalous diffusion, it would be useful to study a time fractional Fokker–Planck equation. In this paper, firstly the time fractional, the sense of Riemann–Liouville derivative, Fokker–Planck equation is transformed into a time fractional ordinary differential equation (FODE) in the sense of Caputo derivative by discretizing the spatial derivatives and using the properties of Riemann–Liouville derivative and Caputo derivative. Then combining the predictor–corrector approach with the method of lines, the algorithm is designed for numerically solving FODE with the numerical error O(kmin{1+2α,2})+O(h2), and the corresponding stability condition is got. The effectiveness of this numerical algorithm is evaluated by comparing its numerical results for α=1.0 with the ones of directly discretizing classical Fokker–Planck equation, some numerical results for time fractional Fokker–Planck equation with several different fractional orders are demonstrated and compared with each other, moreover for α=0.8 the convergent order in space is confirmed and the numerical results with different time step sizes are shown. 相似文献
11.
On May 20, 2019 the values of the Planck, h, and Avogadro, NA, constants will be fixed, revising our measurement system, the International System of Units (SI), and providing a new way to get mass traceability. While the famous energy relations mc2 and hf may remind many that the Planck constant is indeed related to mass, it is less recognized how this is also true for the Avogadro constant. These concepts are reviewed in the context of the upcoming revision of the SI. How the fixed values were chosen and how mass traceability will be maintained with the smallest uncertainty are also discussed. 相似文献
12.
The origin of the grand unified theory (GUT) scale from the top-down perspective is explored. The GUT gauge symmetry is broken
by the renormalization group effects, which is an extension of the radiative electroweak symmetry breaking scenario to the
GUT models. That is, in the same way as the origin of the electroweak scale, the GUT scale is generated from the Planck scale
through the radiative corrections to the soft supersymmetry breaking mass parameters. This mechanism is applied to a perturbative
SO(10) GUT model, recently proposed by us. In the SO(10) model, the relation between the GUT scale and the Planck scale can naturally be realized by using order-one coupling
constants.
PACS 12.10.-g, 12.10.Dm, 12.10.Kt 相似文献
13.
Supersymmetric Standard Model (MSSM) has two sources of rapid proton decay: (i) R-parity breaking terms and (ii) higher dimensional Planck induced B-violating terms; its extensions to include neutrino masses via the type I seesaw mechanism need not have the first of these problems due to the existence of B−L as a gauge symmetry but for sure always have the second one. If instead, neutrino masses are explained in a type III seesaw extension of standard model, an anomaly free gauge symmetry different from B−L is known to exist. In this note, it is shown that a realistic supersymmetric versions of this model can be constructed (MSSM as well as SUSY left–right with type III seesaw) which eliminate R-parity violating couplings and suppress Planck scale contributions to proton decay. The degree of suppression of the latter depends on the weak gauge group. For the left–right case, the suppression to the desired level is easily achieved. 相似文献
14.
R.F. Alvarez‐Estrada 《Annalen der Physik》2002,11(5):357-385
The issue of irreversibility is revisited for a closed system formed by N classical non‐relativistic particles inside a volume Ω, interacting through two‐body potentials, for large N and Ω. The classical phase‐space distribution function f, multiplied by suitable Hermite polynomials and integrated over all momenta, yields new moments. The Liouville equation and the initial distribution fin imply a new non‐equilibrium linear infinite hierarchy for the moments. That hierarchy differs from the BBGKY one for distribution functions and displays some suggestive Fokker‐Planck‐like structures. A physically motivated ansatz for fin (which introduces statistical assumptions), used by previous authors, is chosen. All moments of order n ≥ n0 are expressed in terms of those of order n0 — 1 and of fin. The properties of the Fokker‐Planck‐like structures (hermiticity, non‐negative eigenvalues) allow for implementing a natural long‐time approximation in the hierarchy, so as to introduce relaxation to equilibrium and irreversibility, consistently with the hydrodynamical balance equations. Further (more restrictive) assumptions and approximations lead to new irreversible models, generalizing non‐trivially the Fokker‐Planck equation. They are described through a truncated hierarchy of linear equations for moments of order n ≤ n0 — 1 (n0 being finite). The connections with Brownian particle dynamics and Fluid Dynamics are analyzed, for consistency. 相似文献
15.
In order to gain insight into the possible Ground State of Quantized Einstein's Gravity, we have derived a variational calculation of the energy of the quantum gravitational field in an open space, as measured by an asymptotic observer living in an asymptotically flat space-time. We find that for Quantum Gravity (QG) it is energetically favourable to perform its quantum fluctuations not upon flat space-time but around a "gas" of wormholes of mass m
p, the Planck mass (m
p 1019 GeV) and average distance l
p, the Planck length a
p(a
p 10–33 cm). As a result, assuming such configuration to be a good approximation to the true Ground State of Quantum Gravity, space-time, the arena of physical reality, turns out to be well described by Wheeler's quantum foam and adequately modeled by a space-time lattice with lattice constant l
p, the Planck lattice. 相似文献
16.
V. I. Psarev 《Russian Physics Journal》1998,41(11):1093-1097
We present an analysis of general statistical distributions, from which we obtain the Maxwell and Planck distributions. Using
the derived relationships among the moments of the distributions, when they are confined to the interval (0, ∞) or the finite
interval (0,d) of index values, it is possible to determine more reliably the degree of correlation between the theoretical distribution
and the experimental one. It is shown that the Planck distribution for the spectral power of radiation does not describe the
solar spectrum in the visible wavelength range.
State University, Zaporog. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 11, pp. 39–44, November, 1998. 相似文献
17.
We consider non-renormalizable interaction term as perturbation of the conventional neutrino mass matrix. We assume that the
neutrino masses and mixing arise through physics at a scale intermediate between Planck scale and the electroweak breaking
scale. We also assume that, just above the electroweak breaking scale, neutrino masses are nearly degenerate and their mixing
is tetra-maximal. Quantum gravity (Planck scale effects) lead to an effective SU(2)
L
×U(1) invariant dimension-5 Lagrangian involving neutrino and Higgs fields. On electroweak symmetry breaking, this operator
gives rise to correction to the above masses and mixing. These additional term can be consider as a perturbation to the Tetra-maximal
mass matrix. The nature of gravitational interaction demands that the element of this perturbation matrix should be independent
of flavor indices. We compute the deviation of three neutrino mixing angles due to Planck scale effects. We find that there
is no change in θ
13 and θ
23 but change in solar mixing angle θ
12 is suppress by 3.0°. 相似文献
18.
Antonino Marciano 《Czechoslovak Journal of Physics》2005,55(11):1479-1485
I summarize results recently obtained in collaboration with Amelino-Camelia, Bruno and Mandanici (preprint University of Rome
“La Sapienza”, August, 2005) that concern an analysis of the path of a massless particle in a q-de Sitter space-time and an approximation scheme suitable for the corresponding analysis in a quantum FRW Universe. On the
basis of some arguments in the quantum-gravity literature, the q deformation parameter is assumed to depend on both the Planck scale and the curvature, leading to results that are significantly
different from those of other studies of Planck-scale effects in cosmology, where the possibility of an interplay between
curvature and Planck scale was ignored.
Presented at the International Colloquium “Integrable Systems and Quantum Symmetries”, Prague, 16–18 June 2005. 相似文献
19.
20.
Slobodan Prvanović 《International Journal of Theoretical Physics》2012,51(6):1838-1846
The algebra of polynomials in operators that represent generalized coordinate and momentum and depend on the Planck constant
is defined. The Planck constant is treated as the parameter taking values between zero and some nonvanishing h
0. For the later of these two extreme values, introduced operator algebra becomes equivalent to the algebra of observables
of quantum mechanical system defined in the standard manner by operators in the Hilbert space. For the vanishing Planck constant,
the generalized algebra gives the operator formulation of classical mechanics since it is equivalent to the algebra of variables
of classical mechanical system defined, as usually, by functions over the phase space. In this way, the semiclassical limit
of kinematical part of quantum mechanics is established through the generalized operator framework. 相似文献