From: Matthew Davis <mdavis_at_physics.uq.edu.au>

Date: Tue, 16 Jan 2007 09:25:04 +1000 (EST)

Date: Tue, 16 Jan 2007 09:25:04 +1000 (EST)

The following message was sent to the matts_arxiv list by Matthew Davis <mdavis_at_physics.uq.edu.au>

Things are still a bit slow, only 15 new papers last week.

The new abstracts:

------------------------------------------------------------------------------

\\

Paper: cond-mat/0701098

Date: Fri, 5 Jan 2007 11:21:45 GMT (198kb)

Title: Fermi-Bose mixture across a Feshbach resonance

Authors: Luca Salasnich and Flavio Toigo

Categories: cond-mat.other cond-mat.stat-mech

Comments: 9 pages, 5 figures, to be published in Phys. Rev. A

Subj-class: Other; Statistical Mechanics

\\

We study a dilute mixture of degenerate bosons and fermions across a Feshbach

resonance of the Fermi-Fermi scattering length $a_F$. This scattering length is

renormalized by the boson-induced interaction between fermions and its value is

crucial to determine the phase diagram of the system. For the mixture in a box

and a positive Bose-Fermi scattering length, we show that there are three

possibilities: a single uniform mixed phase, a purely fermionic phase

coexisting with a mixed phase, and a purely fermionic phase coexisting with a

purely bosonic one. As $1/a_F$ is increased from a negative value to the

Feshbach resonance ($1/a_F=0$) the region of pure separation increases and the

other two regions are strongly reduced. Above the Feshbach resonance

($1/a_F>0$), pairs of Fermi atoms become Bose-condensed molecules. We find that

these molecules are fully spatially separated from the bosonic atoms when

$1/a_F$ exceedes a critical value. For a negative Bose-Fermi scattering length

we deduce the condition for collapse, which coincides with the onset of

dynamical instability of the fully mixed phase. We consider also the mixture in

a harmonic trap and determine the conditions for partial demixing, full

demixing and collapse. The experimental implications of our results are

investigated by analyzing mixtures of $^6$Li--$^{23}$Na and $^{40}$K--$^{87}$Rb

atoms.

\\ ( http://arXiv.org/abs/cond-mat/0701098 , 198kb)

------------------------------------------------------------------------------

\\

Paper (*cross-listing*): nlin.PS/0701011

Date: Thu, 4 Jan 2007 15:55:28 GMT (306kb)

Title: Nonstationary excitations in Bose-Einstein condensates under the action

of periodically varying scattering length with time dependent frequencies

Authors: S. Rajendran, P. Muruganandam, and M. Lakshmanan

Categories: nlin.PS cond-mat.soft

Comments: 17 pages, 6 figures (to be published in Physica D)

Subj-class: Pattern Formation and Solitons; Soft Condensed Matter

\\

We investigate nonstationary excitations in 3D-Bose-Einstein condensates in a

spherically symmetric trap potential under the modulation of scattering length

with slowly varying frequencies (adiabatic modulation). By numerically solving

the Gross-Pitaevskii equation we observe a step-wise increase in the amplitude

of oscillation due to successive phase locking between driving frequency and

nonlinear frequency. Such a nonstationary excitation has been shown to exist by

an analytic approach using variational procedure and perturbation theory in the

action-angle variables. By using a canonical perturbation theory, we have

identified the successive resonance excitations whenever the driven frequency

matches the nonlinear frequency or its subharmonics.

\\ ( http://arXiv.org/abs/nlin/0701011 , 306kb)

------------------------------------------------------------------------------

\\

Paper (*cross-listing*): nucl-th/0701006

Date: Tue, 2 Jan 2007 23:42:26 GMT (23kb)

Title: Spin 1/2 Fermions in the Unitary Limit

Authors: H.S. Kohler

Categories: nucl-th astro-ph cond-mat.other

Comments: 11 pages and 4 figures

Subj-class: Nuclear Theory; Other

\\

The energy shift due to the interaction of two particles in a large box is

proportional to the free particle scattering phase-shift. This provides an

approximation to the effective interaction referred to as the phase-shift

approximation. For a many-body fermion system this effective interaction has to

be corrected for the Pauli-blocking. It is used to calculate the energy of a

spin 1/2 fermion system as a function of the two-body scattering length and

effective range. In the unitary limit with scattering length going to infinity

and effective range going to zero the energy is 0.540 (in the units of the

non-interactiong fermi gas energy) with a pp-ladder summation. Including

hh-ladders the energy is 0.570. A smooth crossover from the BCS to the BEC

region is observed. Pairing is not included.

\\ ( http://arXiv.org/abs/nucl-th/0701006 , 23kb)

------------------------------------------------------------------------------

\\

Paper: cond-mat/0701120

Date: Sat, 6 Jan 2007 03:12:14 GMT (115kb)

Title: The Extended Bose Hubbard Model on the Two Dimensional Honeycomb Lattice

Authors: Jing Yu Gan, Wen Yu Chuan, Jin Wu Ye, Tao Li, Shi Jie Yang, and Yu Yue

Categories: cond-mat.other

Comments: 4pages, 5figures

Subj-class: Other

\\

We study the extended Bose Hubbard model on the two-dimensional honeycomb

lattice by using the quantum Monte Carlo simulations. We present the ground

state phase diagram for both of the hardcore and softcore case. We find that

the results of the honeycomb lattice are just similar to the square lattice.

For the hardcore case, the supersolid state is unstable towards the phase

separation. The transition between $\rho=1/2$ solid and the superfluid is of

first order. For the softcore case, due to the presence of the multiple

occupation, a stable supersolid phase emerges when $\rho>1/2$. We also study

the critical exponents of the transition between $\rho=1/2$ solid and

superfluid at the Heisenberg point. We find the dynamical critical exponent $z$

and the correlation length exponent $\nu$ are $z=0.15$ and $\nu=0.38$.

\\ ( http://arXiv.org/abs/cond-mat/0701120 , 115kb)

------------------------------------------------------------------------------

\\

Paper: cond-mat/0701136

Date: Mon, 8 Jan 2007 07:43:42 GMT (820kb)

Title: Vortex density spectrum of quantum turbulence

Authors: Philippe-Emmanuel P.-E. Roche (NEEL), Pantxo Diribarne (NEEL,

Phys-ENS), Thomas Didelot (NEEL), Olivier Fran\c{c}ais (GROUPE ESIEE, CNAM),

Lionel Rousseau (GROUPE ESIEE), Herv\'{e} Willaime (ESPCI)

Categories: cond-mat.other

Comments: Submitted to Europhys. Lett

Proxy: ccsd hal-00122996

Subj-class: Other

\\

The fluctuations of the vortex density in a turbulent quantum fluid are

deduced from local second-sound attenuation measurements. These measurements

are performed with a micromachined open-cavity resonator inserted across a flow

of turbulent He-II near 1.6 K. The power spectrum of the measured vortex line

density is compatible with a (-5/3) power law. The physical interpretation,

still open, is discussed.

\\ ( http://arXiv.org/abs/cond-mat/0701136 , 820kb)

------------------------------------------------------------------------------

\\

Paper: cond-mat/0701157

Date: Mon, 8 Jan 2007 23:02:24 GMT (59kb)

Title: Universality in the BCS - BEC Crossover in Cold Fermion Gases

Authors: S. Diehl

Categories: cond-mat.supr-con

Comments: 14 pages, 6 figures. Talk given at the 2006 ECT* School

``Renormalization Group and Effective Field Theory Approaches to Many-Body

Systems'', Trento, Italy

Subj-class: Superconductivity

\\

We address the finite temperature phase diagram of ultracold fermionic atoms

across a Feshbach resonance based on a functional integral for an atom-molecule

model. This allows to fully exploit the presence of the global symmetry of

phase rotations, U(1). Both the equation of state and the classification of the

thermodynamic phases are obtained from a symmetry consideration. We focus on

the universal aspects associated to narrow and broad resonances, in turn

connected by an additional form of crossover. The narrow resonance limit can be

solved exactly above the critical temperature. We also assess deviations from

the broad resonance universality which have recently been probed

experimentally.

\\ ( http://arXiv.org/abs/cond-mat/0701157 , 59kb)

------------------------------------------------------------------------------

\\

Paper: cond-mat/0701178

Date: Tue, 9 Jan 2007 16:38:22 GMT (101kb)

Title: Phase diagram and thermodynamics of the three-dimensional Bose-Hubbard

model

Authors: B. Capogrosso-Sansone, N. V. Prokof'ev, B. V. Svistunov

Categories: cond-mat.other cond-mat.stat-mech

Comments: 11 pages, 13 figures

Subj-class: Other; Statistical Mechanics

\\

We report results of quantum Monte Carlo simulations of the Bose-Hubbard

model in three dimensions. Critical parameters for the

superfluid-to-Mott-insulator transition are determined with significantly

higher accuracy than it has been done in the past. In particular, the position

of the critical point at filling factor n=1 is found to be at (U/t)_c =

29.34(2), and the insulating gap Delta is measured with accuracy of a few

percent of the hopping amplitude t. We obtain the effective mass of particle

and hole excitations in the insulating state--with explicit demonstration of

the emerging particle-hole symmetry and relativistic dispersion law at the

transition tip--along with the sound velocity in the strongly correlated

superfluid phase. These parameters are the necessary ingredients to perform

analytic estimates of the low temperature (T << Delta) thermodynamics in

macroscopic samples. We present accurate thermodynamic curves, including these

for specific heat and entropy, for typical insulating (U/t=40) and superfluid

(t/U=0.0385) phases. Our data can serve as a basis for accurate experimental

thermometry, and a guide for appropriate initial conditions if one attempts to

use interacting bosons in quantum information processing.

\\ ( http://arXiv.org/abs/cond-mat/0701178 , 101kb)

------------------------------------------------------------------------------

\\

Paper: cond-mat/0701180

Date: Tue, 9 Jan 2007 19:21:56 GMT (38kb)

Title: Twenty years of magnon Bose condensation and spin current superfluidity

in 3He-B

Authors: G.E. Volovik

Categories: cond-mat.other

Comments: 12 pages, 1 figure

Subj-class: Other

\\

20 years ago a new quantum state of matter was discovered and identified. The

observed dynamic quantum state of spin precession in superfluid $^3$He-B bears

the properties of spin current superfluidity, Bose condensation of spin waves

-- magnons, off-diagonal long-range order and related phenomena of quantum

coherence

\\ ( http://arXiv.org/abs/cond-mat/0701180 , 38kb)

------------------------------------------------------------------------------

\\

Paper: cond-mat/0701181

Date: Tue, 9 Jan 2007 17:25:21 GMT (301kb)

Title: Expansion of an ultra-cold lithium gas in the BEC-BCS crossover

Authors: Leticia Tarruell (LKB - Lhomond), Martin Teichmann (LKB - Lhomond),

Jason Mckeever (LKB - Lhomond), Thomas Bourdel (LKB - Lhomond), Julien

Cubizolles (LKB - Lhomond), Lev Khaykovich, Jing Zhang (SKLQOQOD), Nir Navon

(LKB - Lhomond), Fr\'{e}d\'{e}ric Chevy (LKB - Lhomond), Christophe Salomon

(LKB - Lhomond)

Categories: cond-mat.stat-mech cond-mat.mes-hall

Comments: 10 pages, to be published in the Proceddings of the 2006 Enrico Fermi

summer school on Fermi gases

Proxy: ccsd hal-00123470

Subj-class: Statistical Mechanics; Mesoscopic Systems and Quantum Hall Effect

\\

We present an experimental study of the time of flight properties of a gas of

ultra-cold fermions in the BEC-BCS crossover. Since interactions can be tuned

by changing the value of the magnetic field, we are able to probe both non

interacting and strongly interacting behaviors. These measurements allow us to

characterize the momentum distribution of the system as well as its equation of

state. We also demonstrate the breakdown of superfluid hydrodynamics in the

weakly attractive region of the phase diagram, probably caused by pair breaking

taking place during the expansion.

\\ ( http://arXiv.org/abs/cond-mat/0701181 , 301kb)

------------------------------------------------------------------------------

\\

Paper (*cross-listing*): nlin.CD/0612052

Date: Fri, 22 Dec 2006 18:50:39 GMT (365kb)

Title: Growing condensate in two-dimensional turbulence

Authors: M. Chertkov, C. Connaughton, I. Kolokolov, V. Lebedev

Categories: nlin.CD cond-mat.stat-mech physics.flu-dyn

Comments: 4 pages, 4 figures

Subj-class: Chaotic Dynamics; Statistical Mechanics; Fluid Dynamics

\\

We report a detailed numerical study of the phenomenon of ``energy

condensation'' in the inverse energy cascade of 2D turbulence in a biperiodic

box. Condensation is a finite size effect which occurs if the large scale

damping is weak enough to allow the inverse cascade to reach the size of the

system. It leads to the emergence of a coherent vortex dipole of a size

comparable to the box. We characterise the strongly inhomogeneous spatial

structure of the condensate and show that its time growth is self-similar. We

decompose the flow into a coherent and fluctuating component. The coherent

component, containing most of the energy, replaces the usual $k^{-5/3}$ inverse

cascade energy spectrum with a markedly steeper spectrum at large scales. Once

the coherent component is subtracted, however, we find that the fluctuations

have a spectrum close to $k^{-1}$. The fluctuations decay slowly as the

coherent part grows.

\\ ( http://arXiv.org/abs/nlin/0612052 , 365kb)

------------------------------------------------------------------------------

\\

Paper: quant-ph/0701038

Date: Tue, 9 Jan 2007 06:06:23 GMT (172kb)

Title: Theory of chaotic atomic transport in an optical lattice

Authors: V.Yu. Argonov and S.V. Prants

Categories: quant-ph

Comments: 14 pages, 8 figures

\\

A semiclassical theory of chaotic atomic transport in a one-dimensional

nondissipative optical lattice is developed. Using the basic equations of

motion for the Bloch and translational atomic variables, we derive a stochastic

map for the synchronized component of the atomic dipole moment that determines

the center-of-mass motion. We find the analytical relations between the atomic

and lattice parameters under which atoms typically alternate between flying

through the lattice and being trapped in the wells of the optical potential. We

use the stochastic map to derive formulas for the probability density functions

(PDFs) for the flight and trapping events. Statistical properties of chaotic

atomic transport strongly depend on the relations between the atomic and

lattice parameters. We show that there is a good quantitative agreement between

the analytical PDFs and those computed with the stochastic map and the basic

equations of motion for different ranges of the parameters. Typical flight and

trapping PDFs are shown to be broad distributions with power law ``heads'' with

the slope -1.5 and exponential ``tails''. The lengths of the power law and

exponential parts of the PDFs depend on the values of the parameters and can be

varied continuously. We find analytical conditions, under which deterministic

atomic transport has fractal properties, and explain a hierarchical structure

of the dynamical fractals.

\\ ( http://arXiv.org/abs/quant-ph/0701038 , 172kb)

------------------------------------------------------------------------------

\\

Paper: quant-ph/0701049

Date: Tue, 9 Jan 2007 18:39:31 GMT (267kb)

Title: Electromagnetically Induced Transparency in optically trapped rubidium

atoms

Authors: Bernd Kaltenh\"{a}user, Harald K\"{u}bler, Andreas Chromik, J\"{u}rgen

Stuhler, Tilman Pfau, Atac Imamoglu

Comments: 5 pages, 8 figures

\\

We demonstrate electromagnetically induced transparency (EIT) in a sample of

rubidium atoms, trapped in an optical dipole trap. Mixing a small amount of

$\sigma^-$-polarized light to the weak $\sigma^+$-polarized probe pulses, we

are able to measure the absorptive and dispersive properties of the atomic

medium at the same time. Features as small as 4 kHz have been detected on an

absorption line with 20 MHz line width.

\\ ( http://arXiv.org/abs/quant-ph/0701049 , 267kb)

------------------------------------------------------------------------------

\\

Paper: cond-mat/0701198

Date: Wed, 10 Jan 2007 11:56:00 GMT (74kb)

Title: Flow Equations for the BCS-BEC Crossover

Authors: S. Diehl, H. Gies, J. M. Pawlowski, C. Wetterich

Categories: cond-mat.supr-con cond-mat.stat-mech

Comments: 4 pages, 4 figures

Report-no: HD-THEP-07-02

Subj-class: Superconductivity; Statistical Mechanics

\\

The functional renormalisation group is used for the BCS-BEC crossover in

gases of ultracold fermionic atoms. In a simple truncation, we see how

universality and an effective theory with composite bosonic di-atom states

emerge. We obtain a unified picture of the whole phase diagram. The flow

reflects different effective physics at different scales. In the BEC limit as

well as near the critical temperature, it describes an interacting bosonic

theory.

\\ ( http://arXiv.org/abs/cond-mat/0701198 , 74kb)

------------------------------------------------------------------------------

\\

Paper: cond-mat/0701212

Date: Wed, 10 Jan 2007 16:52:13 GMT (268kb)

Title: N-conserving Bogoliubov vacuum of a two component Bose-Einstein

condensate: Density fluctuations close to a phase separation condition

Authors: Bartlomiej Oles, Krzysztof Sacha

Categories: cond-mat.other

Comments: 11 pages, 5 figures

Subj-class: Other

\\

Two component Bose-Einstein condensates are considered within a number

conserving version of the Bogoliubov theory. We show that the Bogoliubov vacuum

state can be obtained in the particle representation in a simple form. The

formalism is used to analyze homogeneous condensates and condensates in a

double well potential. We show that for values of system parameters close to a

phase separation condition considerable density fluctuations appear. The

predicted fluctuations can be measured experimentally.

\\ ( http://arXiv.org/abs/cond-mat/0701212 , 268kb)

------------------------------------------------------------------------------

\\

Paper: physics/0701123

Date: Wed, 10 Jan 2007 14:39:51 GMT (98kb)

Title: Grid methods for cold molecules : determination of photoassociation

lineshapes and rate constants

Authors: S. Kallush, R. Kosloff and F. Masnou-Seeuws

Categories: physics.chem-ph physics.atom-ph

Comments: Submitted to PRA

Subj-class: Chemical Physics; Atomic Physics

\\

A description of photoassociation by CW laser is formulated in the framework

of grid methods. The Hamiltonian describing one or several bound states coupled

to a multiple of continuum manifolds via a radiative field is written in the

energy representation and diagonalized. The generality of the treatment allows

to compute accurately and efficiently physical properties such as non-linear

high-intensity energy shifts, line shapes, and photoassociation rates both for

isolated and non-isolated resonances. Application is given to sodium

photoassociation in the experimental conditions of Mc Kenzie {\it et al} [Phys.

Rev. Lett. {\bf 88}, 090403 (2002)]. Inverted region for the dependency of the

rate vs. the intensity and non-symmetric lineshapes were predicted to occur

above the saturation limit. Comparison with the model of Bohn and Julienne

[Phys. Rev. A {\bf 60}, 414 (1999)] is discussed.

\\ ( http://arXiv.org/abs/physics/0701123 , 98kb)

------------------------------------------------------------------------------

\\

Paper: cond-mat/0701236

Date: Thu, 11 Jan 2007 09:01:49 GMT (7kb)

Title: Bogolyubov approximation for diagonal model of an interacting Bose gas

Authors: M.Corgini, D.P.Sankovich

Categories: cond-mat.stat-mech

Subj-class: Statistical Mechanics

\\

We study, using the Bogolyubov approximation, the thermodynamic behaviour of

a superstable Bose system whose energy operator in the second-quantized form

contains a nonlinear expression in the occupation numbers operators. We prove

that for all values of the chemical potential satisfying $\mu > \lambda(0)$,

where $\lambda (0)\leq 0$ is the lowest energy value, the system undergoes

Bose--Einstein condensation.

\\ ( http://arXiv.org/abs/cond-mat/0701236 , 7kb)

------------------------------------------------------------------------------

\\

Paper: cond-mat/0701251

Date: Thu, 11 Jan 2007 18:37:48 GMT (44kb)

Title: The Shear Viscosity to Entropy Density Ratio of Trapped Fermions in the

Unitarity Limit

Authors: Thomas Schaefer (North Carolina State University)

Categories: cond-mat.other

Comments: 4 pages, two figures

Subj-class: Other

\\

We extract the shear viscosity to entropy density ratio \eta/s of cold

fermionic atoms in the unitarity limit from experimental data on the damping of

collective excitations. We find that above the critical temperature \eta/s is

only weakly dependent on temperature and roughly equal to 1/3 in units of

\hbar/k_B. With the possible exception of the quark gluon plasma, this value is

closer to the conjectured lower bound 1/(4\pi) than any other known liquid.

\\ ( http://arXiv.org/abs/cond-mat/0701251 , 44kb)

------------------------------------------------------------------------------

\\

Paper: quant-ph/0701060

Date: Thu, 11 Jan 2007 13:11:44 GMT (569kb)

Title: Quantum time of flight distribution for cold trapped atoms

Authors: Md. Manirul Ali, Dipankar Home, A. S. Majumdar, Alok K. Pan

Categories: quant-ph

Comments: 6 pages, RevTex, 4 eps figures

\\

The time of flight distribution for a cloud of cold atoms falling freely

under gravity is considered. We generalise the probability current density

approach to calculate the quantum arrival time distribution for the mixed state

describing the Maxwell-Boltzmann distribution of velocities for the falling

atoms. We find an empirically testable difference between the time of flight

distribution calculated using the quantum probability current and that obtained

from a purely classical treatment which is usually employed in analysing time

of flight measurements. The classical time of flight distribution matches with

the quantum distribution in the large mass and high temperature limits.

\\ ( http://arXiv.org/abs/quant-ph/0701060 , 569kb)

------------------------------------------------------------------------------

The replacements:

------------------------------------------------------------------------------

\\

Paper (*cross-listing*): math-ph/0611043

replaced with revised version Mon, 8 Jan 2007 18:40:13 GMT (18kb)

Title: Interacting Bose and Fermi gases in low dimensions and the Riemann

hypothesis

Authors: Andr\'e LeClair

Categories: math-ph cond-mat.stat-mech math.MP math.NT

Comments: version 2: typos corrected

Subj-class: Mathematical Physics; Statistical Mechanics; Number Theory

\\ ( http://arXiv.org/abs/math-ph/0611043 , 18kb)

------------------------------------------------------------------------------

\\

Paper: cond-mat/0511721

replaced with revised version Tue, 9 Jan 2007 17:30:33 GMT (10kb)

Title: Vanishing bulk viscosities and conformal invariance of unitary Fermi gas

Authors: D.T. Son

Categories: cond-mat.other cond-mat.supr-con

Comments: 4 pages

Report-no: INT-PUB 05-29

Subj-class: Other; Superconductivity

\\ ( http://arXiv.org/abs/cond-mat/0511721 , 10kb)

------------------------------------------------------------------------------

\\

Paper: cond-mat/0610575

replaced with revised version Tue, 9 Jan 2007 14:50:24 GMT (16kb)

Title: Probing Anomalous Longitudinal Fluctuations of the Interacting Bose Gas

via Bose-Einstein Condensation of Magnons

Authors: Andreas Kreisel, Nils Hasselmann, and Peter Kopietz

Categories: cond-mat.stat-mech cond-mat.str-el

Comments: 4 pages, 1 figure, revised version. To appear in Physical Review

Letters

Subj-class: Statistical Mechanics; Strongly Correlated Electrons

\\ ( http://arXiv.org/abs/cond-mat/0610575 , 16kb)

------------------------------------------------------------------------------

\\

Paper: cond-mat/0612268

replaced with revised version Tue, 9 Jan 2007 08:01:20 GMT (164kb)

Title: Fermionic superfluidity: From high Tc superconductors to ultracold Fermi

gases

Authors: Qijin Chen, Chih-Chun Chien, Yan He, and K. Levin

Categories: cond-mat.str-el cond-mat.supr-con

Comments: Expanded version, invited talk at the 5th International Conference on

Complex Matter -- Stripes 2006, 6 pages, 6 figures

Subj-class: Strongly Correlated Electrons; Superconductivity

\\ ( http://arXiv.org/abs/cond-mat/0612268 , 164kb)

------------------------------------------------------------------------------

\\

Paper: cond-mat/0612522

replaced with revised version Tue, 9 Jan 2007 13:43:27 GMT (24kb)

Title: Mott-insulator phases of non-locally coupled 1D dipolar Bose gases

Authors: A. Arguelles and L. Santos

Categories: cond-mat.other

Comments: 4 pages, 4 eps figures; minor changes, reference added

Subj-class: Other

\\ ( http://arXiv.org/abs/cond-mat/0612522 , 24kb)

------------------------------------------------------------------------------

\\

Paper: quant-ph/0612200

replaced with revised version Wed, 10 Jan 2007 11:05:46 GMT (254kb)

Title: Coherent optical detection of highly excited Rydberg states using

electromagnetically induced transparency

Authors: A. K. Mohapatra, T. R. Jackson, C. S. Adams

Categories: quant-ph

Comments: Comments removed

\\ ( http://arXiv.org/abs/quant-ph/0612200 , 254kb)

------------------------------------------------------------------------------

\\

Paper: cond-mat/0611487

replaced with revised version Thu, 11 Jan 2007 08:16:01 GMT (471kb)

Title: Time modulation of atom sources

Authors: A. del Campo, J. G. Muga, M. Moshinsky

Categories: cond-mat.other

Comments: 13 pages, 8+1 figures, references added, minor corrections

Subj-class: Other

\\ ( http://arXiv.org/abs/cond-mat/0611487 , 471kb)

------------------------------------------------------------------------------

And if you're still reading at this stage, here's one just for fun:

------------------------------------------------------------------------------

\\

Paper: physics/0701130

Date: Thu, 11 Jan 2007 03:27:13 GMT (145kb)

Title: NASA's astonishing evidence that c is not constant: The pioneer anomaly

Authors: E. D. Greaves

Categories: physics.gen-ph physics.space-ph

Comments: 5 pages, 2 figures, 1 table; Submitted to Astrophysical Journal

Subj-class: General Physics; Space Physics

\\

For over 20 years NASA has struggled to find an explanation to the Pioneer

anomaly. Now it becomes clear the solution to the riddle is that they have

uncovered evidence that c, the speed of light, is not quite a universal

constant. Using J. C. Cure s hypothesis that the index of refraction is a

function of the gravitational energy density of space and straightforward

Newtonian mechanics, NASA s measurements provide compelling evidence that the

speed of light depends on the inverse of the square root of the gravitational

energy density of space. The magnitude of the Pioneer anomalous acceleration

leads to the value of the primordial energy density of space due to faraway

stars and galaxies: 1.0838. x 10^15 Joule/m3. A value which almost miraculously

coincides with the same quantity: 1.09429 x 10^15 Joule/m3 derived by J. C.

Cure from a completely different phenomenon: the bending of starlight during

solar eclipses.

\\ ( http://arXiv.org/abs/physics/0701130 , 145kb)

------------------------------------------------------------------------------

Till next week,

Matt.

-- ========================================================================= Dr M. J. Davis, Senior Lecturer in Physics School of Physical Sciences, email: mdavis_at_physics.uq.edu.au University of Queensland, ph : +61 7 334 69824 Brisbane, QLD 4072, fax : +61 7 336 51242 Australia. http://www.physics.uq.edu.au/people/mdavis/ ========================================================================= Matt's arXiv selection: weekly summary of cold-atom papers from arXiv.org http://www.physics.uq.edu.au/people/mdavis/matts_arXiv/ ========================================================================= Legal stuff: Unless stated otherwise, this e-mail represents only the views of the sender and not the views of the University of Queensland =========================================================================Received on Tue Jan 16 2007 - 09:25:04 EST

*
This archive was generated by hypermail 2.2.0
: Thu May 08 2008 - 11:51:41 EST
*