The Physics Olympics in Beijing

After the stunning defeat of the American team on opening day of the
Beijing Olympics, the Chinese have surged ahead in the Physics Olympics
competition with their new VUV Laser ARPES Facility! But, no, the rest
of the world will not let the Chinese dominate without a competition!

The Europeans have made a great showing in the physics events these last
few days with several interesting finishes :

http://arxiv.org/abs/0808.1028

Energy Gaps and Kohn Anomalies in Elemental Superconductors

which demonstrate incipient spin and charge density wave instabilities
in elemental superconductors, and now another paper on the fundamental
theory of time resolved optical spectroscopy, a technique developed by
Dragan Mihailovic and the Slovakian team :

http://arxiv.org/abs/0808.1005

Theory of time-resolved optical spectroscopy on correlated electron systems.

And now the Japanese come up with their own stunning victory :

http://arxiv.org/abs/0808.1323

An Isotopic Fingerprint of Electron-Phonon Coupling in High-Tc Cuprates

They haven't buckled in to the threat of the Chinese, but they are
breathing heavily! In other words, breathing modes, not buckling modes.

What are the Americans to do, having been soundly defeated. Will they
rush to completion their own laser ARPES facility at the UW Madison?

Will they even be ready for the 2012 Olympics?

No, wait, they're going out with a bang, they're going to PASS!

It's a long bomb!

http://arxiv.org/abs/0807.4468

The cosmological BCS mechanism and the Big Bang Singularity

OMG, they fumbled the ball, now the universe is going to expand FOREVER!

kT wrote:

After the stunning defeat of the American team on opening day of the
Beijing Olympics, the Chinese have surged ahead in the Physics Olympics
competition with their new VUV Laser ARPES Facility! But, no, the rest
of the world will not let the Chinese dominate without a competition!
[snip further crap]

Idiot.

--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/lajos.htm#a2

Uncle Al wrote:

kT wrote:

After the stunning defeat of the American team on opening day of the
Beijing Olympics, the Chinese have surged ahead in the Physics Olympics
competition with their new VUV Laser ARPES Facility! But, no, the rest
of the world will not let the Chinese dominate without a competition!

[snip further crap]

Idiot.

Uncle Al's comments are always inciteful.

http://arxiv.org/abs/0711.0282

Development of a Vacuum Ultra-Violet Laser-Based Angle-Resolved
Photoemission System with a Super-High Energy Resolution Better Than

1 meV.

(Submitted on 2 Nov 2007)

The design and performance of the first vacuum ultra-violet (VUV)
laser-based angle-resolved photoemission (ARPES) system are described.
The VUV laser with a photon energy of 6.994 eV and bandwidth of 0.26 meV
is achieved from the second harmonic generation using a novel non-linear
optical crystal KBe2BO3F2 (KBBF). The new VUV laser-based ARPES system
exhibits superior performance, including super-high energy resolution
better than 1 meV, high momentum resolution, super-high photon flux and
much enhanced bulk sensitivity, which are demonstrated from measurements
on a typical Bi2Sr2CaCu2O8 high temperature superconductor. Issues and
further development related to the VUV laser-based photoemission
technique are discussed.

"Uncle Al" wrote
Idiot.

Yup. You are indeed.

V for Vendicar wrote:

"Uncle Al" wrote
Idiot.

Yup. You are indeed.

And in a stunning upset at the physics games in Beijing tonight, the
Germans take the Gold!

http://arxiv.org/abs/0808.1675

Metallicity in the half-filled Holstein-Hubbard model

Authors: H. Fehske, G. Hager, J. Jeckelmann

(Submitted on 12 Aug 2008)

We re-examine the Peierls insulator to Mott insulator transition
scenario in the one-dimensional Holstein-Hubbard model where, at
half-filling, electron-phonon and electron-electron interactions compete
for establishing charge- and spin-density-wave states, respectively. By
means of large-scale density-matrix renormalization group calculations
we determine the spin-, single-particle charge- and two-particle
charge-excitation gaps and prove--in the course of a careful finite-size
scaling analysis--recent claims for an intervening metallic phase in the
weak-coupling regime. We show that for large phonon frequencies the
metallic region is even more extended than previously expected, and
subdivided into ordinary Luttinger liquid and bipolaronic liquid phases

Big celebration tonight all over the WORLD!

"kT" wrote
And in a stunning upset at the physics games in Beijing tonight, the
Germans take the Gold!

http://arxiv.org/abs/0808.1675

Metallicity in the half-filled Holstein-Hubbard model

Authors: H. Fehske, G. Hager, J. Jeckelmann

(Submitted on 12 Aug 2008)

We re-examine the Peierls insulator to Mott insulator transition scenario
in the one-dimensional Holstein-Hubbard model where, at half-filling,
electron-phonon and electron-electron interactions compete for
establishing charge- and spin-density-wave states, respectively. By means
of large-scale density-matrix renormalization group calculations we
determine the spin-, single-particle charge- and two-particle
charge-excitation gaps and prove--in the course of a careful finite-size
scaling analysis--recent claims for an intervening metallic phase in the
weak-coupling regime. We show that for large phonon frequencies the
metallic region is even more extended than previously expected, and
subdivided into ordinary Luttinger liquid and bipolaronic liquid phases

And what was the American Entry?

"We'ze gone and dunn a Jimmy on the Ford around the corner in Grand Theft
Auto and without being capped by Ay Yo, da motha****a copzzz."

V for Vendicar wrote:
"kT" wrote
And in a stunning upset at the physics games in Beijing tonight, the
Germans take the Gold!

http://arxiv.org/abs/0808.1675

Metallicity in the half-filled Holstein-Hubbard model

Authors: H. Fehske, G. Hager, J. Jeckelmann

(Submitted on 12 Aug 2008)

We re-examine the Peierls insulator to Mott insulator transition scenario
in the one-dimensional Holstein-Hubbard model where, at half-filling,
electron-phonon and electron-electron interactions compete for
establishing charge- and spin-density-wave states, respectively. By means
of large-scale density-matrix renormalization group calculations we
determine the spin-, single-particle charge- and two-particle
charge-excitation gaps and prove--in the course of a careful finite-size
scaling analysis--recent claims for an intervening metallic phase in the
weak-coupling regime. We show that for large phonon frequencies the
metallic region is even more extended than previously expected, and
subdivided into ordinary Luttinger liquid and bipolaronic liquid phases

And what was the American Entry?

"We'ze gone and dunn a Jimmy on the Ford around the corner in Grand Theft
Auto and without being capped by Ay Yo, da motha****a copzzz."


http://www.youtube.com/watch?v=dnP1h...eature=related

V for Vendicar wrote:
"kT" wrote
And in a stunning upset at the physics games in Beijing tonight, the
Germans take the Gold!

http://arxiv.org/abs/0808.1675

Metallicity in the half-filled Holstein-Hubbard model

Authors: H. Fehske, G. Hager, J. Jeckelmann

(Submitted on 12 Aug 2008)

We re-examine the Peierls insulator to Mott insulator transition scenario
in the one-dimensional Holstein-Hubbard model where, at half-filling,
electron-phonon and electron-electron interactions compete for
establishing charge- and spin-density-wave states, respectively. By means
of large-scale density-matrix renormalization group calculations we
determine the spin-, single-particle charge- and two-particle
charge-excitation gaps and prove--in the course of a careful finite-size
scaling analysis--recent claims for an intervening metallic phase in the
weak-coupling regime. We show that for large phonon frequencies the
metallic region is even more extended than previously expected, and
subdivided into ordinary Luttinger liquid and bipolaronic liquid phases

And what was the American Entry?

Tonight the University of Chicago finally win a medal for the Americans,
they'll have to settle for a bronze this year, also in the theoretical :

http://arxiv.org/abs/0808.1900

Fermions with attractive interactions on optical lattices and what they
imply for correlated systems :

"A central conclusion of our work is that in a lattice, around half
filling, the smooth evolution from the BCS to the BEC limits is
interrupted."

Introducing : phase separation!

Let's give a big round of applause for the Chih-Chun Chien, Qijin Chen,
and Kathryn Levin, also the German Polaron group and Chinese VUV group!

A fine showing in the condensed matter competition at the Olympics!