905 research outputs found
Classical and Quantum Interaction of the Dipole
A unified and fully relativistic treatment of the interaction of the electric
and magnetic dipole moments of a particle with the electromagnetic field is
given. New forces on the particle due to the combined effect of electric and
magnetic dipoles are obtained. Four new experiments are proposed, three of
which would observe topological phase shifts.Comment: 10 pages, Latex/Revtex. Some minor errors have been correcte
Influence of gender and locality on achievement in physics among matriculation students of Krishnagiri district of Tamilnadu
The aim of the present study was to measure the influence of Gender and
Locality on the Achievement in Physics among the Matriculation Students of
Krishnagiri District of Tamil Nadu. The study belongs to the Normative Survey
Research. The sample consists of 350 students of which 190 Urban and 160 Rural
students. There are 234 boys and 116 girls totally. The investigators constructed an
Achievement Test in Physics consisting of 120 items with 4 alternatives. To find out the
significant difference with regard to the variables,lf test was followed. It was found that
the achievement of boys in physics in Urban Matriculation schools were significantly
higher than their counter part. The higher achievement of the Urban boys and Urban
girls may be due to the reasons of higher motivation of the parents, higher instructional
facilities, competition among the motivated students and higher students general
awareness
Gravitational Phase Operator and Cosmic Strings
A quantum equivalence principle is formulated by means of a gravitational
phase operator which is an element of the Poincare group. This is applied to
the spinning cosmic string which suggests that it may (but not necessarily)
contain gravitational torsion. A new exact solution of the Einstein-
Cartan-Sciama-Kibble equations for the gravitational field with torsion is
obtained everywhere for a cosmic string with uniform energy density, spin
density and flux. A novel effect due to the quantized gravitational field of
the cosmic string on the wave function of a particle outside the string is used
to argue that spacetime points are not meaningful in quantum gravity.Comment: 22 pages, to be published Phys. Rev. D. Some minor changes have been
made and a reference has been added to the paper of D.V. Gal'tsov and P.S.
Letelier, Phys. Rev. D 47 (1993) 4273, which first contained the metric (2.2)
external to the cosmic string. The present paper extends this solution to a
regular solution inside the string as wel
Action principle formulation for motion of extended bodies in General Relativity
We present an action principle formulation for the study of motion of an
extended body in General Relativity in the limit of weak gravitational field.
This gives the classical equations of motion for multipole moments of arbitrary
order coupling to the gravitational field. In particular, a new force due to
the octupole moment is obtained. The action also yields the gravitationally
induced phase shifts in quantum interference experiments due to the coupling of
all multipole moments.Comment: Revised version derives Octupole moment force. Some clarifications
and a reference added. To appear in Phys. Rev.
Design of Flying Disk
The flying object, which is the disk shape (sphere) having rotating and non-rotating parts. This can fly at both space and atmosphere having high speed by using the modified rotary wing concept, which is the vortex created by the blade tips is also used as the thrust along with the lift produced by the blades. The additional lift also created by the disk when the blade angle of attack changes. The blades do not connected in the same point and it connected in some degree in the sphere. The blades/wings attached to the iron like ring to cooperate with the high magnetic field, i.e. it rotates with the principle of magnetic levitation followed by this, and vertical takeoff and can land at any place
Geometric phases for mixed states in interferometry
We provide a physical prescription based on interferometry for introducing
the total phase of a mixed state undergoing unitary evolution, which has been
an elusive concept in the past. We define the parallel transport condition that
provides a connection-form for obtaining the geometric phase for mixed states.
The expression for the geometric phase for mixed state reduces to well known
formulas in the pure state case when a system undergoes noncyclic and unitary
quantum evolution.Comment: Two column, 4 pages, Latex file, No figures, Few change
Fatty acid signatures of the Indian mackerel Rastrelliger kanagurta (Cuvier)from the Arabian Sea along the Indian coast
The fatty acid profile of the Indian mackerel Rastrelliger kanagurta from the Arabian Sea was studied
in relation to its maturation and spawning cycle. Among fatty acids, polyunsaturated fatty acids (PUFA)
component was the highest (46.9%) followed by saturated fatty acids (SFA) and monounsaturated fatty
acids (MUFA) at 41.8% and 11% respectively. No differences were observed between the period of
low spawning activity in January and peak spawning activity in May. However significant (p<0.05)
differences were observed with regard to sex where females had higher levels of SFA and MUFA while
males had higher levels of PUFA. With regard to maturity stages, only females showed significant
differences (p<0.05) in MUFA content with higher level in mature stages compared to immature stages.
Docosahexaenoic acid (DHA) was the single largest component of PUFA. The absence of marked
temperature differences in the Arabian Sea probably precludes seasonal effects on the levels of SFA,
MUFA and PUFA in the Indian mackerel while variations of individual FA within these groups indicate
lipid dynamics in relation to reproduction and feeding
Reply to `Singularities of the mixed state phase'
The only difference between Bhandari's viewpoint [quant-ph/0108058] and ours
[Phys. Rev. Lett. 85, 2845 (2000)] is that our phase is defined modulo ,
whereas Bhandari argues that two phases that differ by , integer,
may be distinguished experimentally in a history-dependent manner.Comment: 2 page
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