Physics posts
- February 25, 2011
- 06:27 PM
- 1,372 views
Fusion for the Future: NIF
by The Astronomist in The Astronomist.
Fusion is only 50 years away and it will solve all of the worlds energy problems. That is the good news. The bad news is that it has been 50 years away for the last 50 years. If that situation is maddening to you then you are not alone. Leonardo Mascheroni, a retired Los Alamos National Laboratory physicist, wanted funding to build a colossal laser for producing energy from fusion and was willing to trade the United States' nuclear weapons secrets to realize his dream. Mascheroni was recently in........ Read more »
Glenzer, S., MacGowan, B., Michel, P., Meezan, N., Suter, L., Dixit, S., Kline, J., Kyrala, G., Bradley, D., Callahan, D.... (2010) Symmetric Inertial Confinement Fusion Implosions at Ultra-High Laser Energies. Science, 327(5970), 1228-1231. DOI: 10.1126/science.1185634
- February 23, 2011
- 06:01 PM
- 1,134 views
A Clay Problem solved?
by nath in Imprints of Philippine Science
There is a buzz in the Philippine science circle that Amador Muriel has solved the 3D Navier-Stokes Equation. This equation (or an understanding of this equation) is one of the Millenium Prize Problems of the Clay Mathematics Institute (CMI). These problems collated by CMI are “some of the most difficult problems with which mathematicians were [...]... Read more »
Muriel, A. (1997) An integral formulation of hydrodynamics. Physica D: Nonlinear Phenomena, 101(3-4), 299-316. DOI: 10.1016/S0167-2789(96)00181-9
- February 23, 2011
- 09:40 AM
- 1,825 views
Giggity
by Iddo Friedberg in Byte Size Biology
The authors and editor knew exactly what they were doing with this one:... Read more »
Chau, R., Hamel, S., & Nellis, W. (2011) Chemical processes in the deep interior of Uranus. Nature Communications, 203. DOI: 10.1038/ncomms1198
- February 23, 2011
- 04:00 AM
- 1,460 views
Cut down to size: supermassive black holes turn out not to be so “super” after all
by Kelly Oakes in Basic Space
You might not be able to tell from wherever you are reading this, but black holes in the distant universe just shrunk down to as little as a tenth of their previous size. This is not some cosmic disappearing act; … Continue reading →... Read more »
Kollatschny, W., & Zetzl, M. (2011) Broad-line active galactic nuclei rotate faster than narrow-line ones. Nature, 470(7334), 366-368. DOI: 10.1038/nature09761
- February 22, 2011
- 11:06 AM
- 1,144 views
This “Week” in the Universe: February 1st – February 21st
by S.C. Kavassalis in The Language of Bad Physics
So I’ve been remiss in my reading lately, but here are my picks from the past few weeks. We have Outstanding Problems in Galaxy Formation, Herschel on Dark Matter, Dark Matter Detection Discussed, “Symmetry Breaking” in Graphene?, Closed Timelike Curves and Postselection, Frame-Like Geometry of Double Field Theory, and Loop Lectures with Carlo Rovelli.
Astrophysics and Gravitation:
Outstanding Problems in Galaxy Formation
Joseph Silk (2011). Feedback in Galaxy Formation arXiv arXiv:........ Read more »
Joseph Silk. (2011) Feedback in Galaxy Formation. arXiv. arXiv: 1102.0283v1
Alexandre Amblard, & et al. (2011) Sub-millimetre galaxies reside in dark matter halos with masses greater than 3x10^11 solar masses. Nature. arXiv: 1101.1080v1
San-Jose, P., González, J., & Guinea, F. (2011) Electron-Induced Rippling in Graphene. Physical Review Letters, 106(4). DOI: 10.1103/PhysRevLett.106.045502
Lloyd, S., Maccone, L., Garcia-Patron, R., Giovannetti, V., Shikano, Y., Pirandola, S., Rozema, L., Darabi, A., Soudagar, Y., Shalm, L.... (2011) Closed Timelike Curves via Postselection: Theory and Experimental Test of Consistency. Physical Review Letters, 106(4). DOI: 10.1103/PhysRevLett.106.040403
Hohm, O., & Kwak, S. (2011) Frame-like geometry of double field theory. Journal of Physics A: Mathematical and Theoretical, 44(8), 85404. DOI: 10.1088/1751-8113/44/8/085404
Carlo Rovelli. (2011) Lectures on loop gravity. arXiv. arXiv: 1102.3660v2
- February 21, 2011
- 07:07 AM
- 1,019 views
Igor Suslov and the beta function of the scalar field
by Marco Frasca in The Gauge Connection
I think that blogs are a very good vehicle for a scientist to let his/her work widely known and can be really helpful also for colleagues doing research in the same field. This is the case of Igor Suslov at Kapitza Institute in Moscow. Igor is doing groundbreaking research in quantum field theory and, particularly, [...]... Read more »
I. M. Suslov. (2011) Renormalization Group Functions of \phi^4 Theory from High-Temperature Expansions. J.Exp.Theor.Phys., v.112, p.274 (2011); Zh.Eksp.Teor.Fiz., v.139, p.319 (2011). arXiv: 1102.3906v1
Marco Frasca. (2008) Infrared behavior of the running coupling in scalar field theory. arxiv. arXiv: 0802.1183v4
Marco Frasca. (2010) Mapping theorem and Green functions in Yang-Mills theory. arxiv. arXiv: 1011.3643v2
- February 18, 2011
- 08:43 AM
- 1,208 views
Ashtekar and the BKL conjecture
by Marco Frasca in The Gauge Connection
Abhay Ashtekar is a well-known Indian physicist working at Pennsylvania State University. He has produced a fundamental paper in general relativity that has been the cornerstone of all the field of research of loop quantum gravity. Beyond the possible value that loop quantum gravity may have, we will see in the future, this result of [...]... Read more »
Ashtekar, A. (1986) New Variables for Classical and Quantum Gravity. Physical Review Letters, 57(18), 2244-2247. DOI: 10.1103/PhysRevLett.57.2244
Abhay Ashtekar, Adam Henderson, & David Sloan. (2011) A Hamiltonian Formulation of the BKL Conjecture. arxiv. arXiv: 1102.3474v1
Marco Frasca. (2005) Strong coupling expansion for general relativity. Int.J.Mod.Phys. D15 (2006) 1373-1386. arXiv: hep-th/0508246v3
Frasca, M. (1992) Strong-field approximation for the Schrödinger equation. Physical Review A, 45(1), 43-46. DOI: 10.1103/PhysRevA.45.43
- February 18, 2011
- 06:51 AM
- 1,208 views
The ‘anti-laser’
by Joerg Heber in All That Matters
I don’t have much time this week and next to blog, but yesterday Science published an interesting paper by Hui Cao and colleagues at Yale that is hard to ignore. It is the ‘anti-laser’. In short, this anti-laser does exactly the same what a laser does, just with time reversed. You can do that because the [...]... Read more »
Wan, W., Chong, Y., Ge, L., Noh, H., Stone, A., & Cao, H. (2011) Time-Reversed Lasing and Interferometric Control of Absorption. Science, 331(6019), 889-892. DOI: 10.1126/science.1200735
- February 17, 2011
- 02:36 PM
- 1,088 views
Holifield needs your help
by nuclear.kelly in Miss Atomic Bomb
Below is the text of a letter in support of the continued operation of the Holifield Radioactive Ion Beam Facility at Oak Ridge National Lab. It currently has a dozen signatures attached to it, with more being added daily. If you agree with the letter, consider contacting your representatives and asking them to grant us a fair review.It would be a great tragedy to see the operating budget for the Holifield Radioactive Ion Beam Facility (HRIBF) at Oak Ridge National Laboratory cut, as has been pr........ Read more »
Jones, K., Adekola, A., Bardayan, D., Blackmon, J., Chae, K., Chipps, K., Cizewski, J., Erikson, L., Harlin, C., Hatarik, R.... (2010) The magic nature of 132Sn explored through the single-particle states of 133Sn. Nature, 465(7297), 454-457. DOI: 10.1038/nature09048
Beene, J., Bardayan, D., Galindo Uribarri, A., Gross, C., Jones, K., Liang, J., Nazarewicz, W., Stracener, D., Tatum, B., & Varner, R. (2011) ISOL science at the Holifield Radioactive Ion Beam Facility. Journal of Physics G: Nuclear and Particle Physics, 38(2), 24002. DOI: 10.1088/0954-3899/38/2/024002
- February 16, 2011
- 01:03 PM
- 1,733 views
Light bending to the extreme
by Joerg Heber in All That Matters
How does a lens work? Well, as the light arrives at the lens it gets bent towards the focal point of the lens. The denser the lens material is in comparison to the surrounding air, the more it is deflected. The materials property that quantifies this effect is the refractive index. For lenses, the general [...]... Read more »
Choi, M., Lee, S., Kim, Y., Kang, S., Shin, J., Kwak, M., Kang, K., Lee, Y., Park, N., & Min, B. (2011) A terahertz metamaterial with unnaturally high refractive index. Nature, 470(7334), 369-373. DOI: 10.1038/nature09776
- February 15, 2011
- 05:28 AM
- 1,989 views
Caught in the act: sneak preview of galaxy cluster that’s still forming
by Kelly Oakes in Basic Space
Galaxy clusters are some of the largest structures in the universe. Astronomers have found these clusters, which are large groups of galaxies bound together by gravity, as far back as only 4 billion years after the Big Bang (less than … Continue reading →... Read more »
Capak PL, Riechers D, Scoville NZ, Carilli C, Cox P, Neri R, Robertson B, Salvato M, Schinnerer E, Yan L.... (2011) A massive protocluster of galaxies at a redshift of z ≈ 5.3. Nature, 470(7333), 233-5. PMID: 21228776
- February 10, 2011
- 06:56 AM
- 699 views
QCD at strong magnetic fields
by Marco Frasca in The Gauge Connection
Today on arxiv it is appeared the contribution to the conference “The many faces of QCD” of my friend Marco Ruggieri. Marco is currently a postdoc student at Yukawa Institute in Tokyo and has been a former student of Raoul Gatto. Gatto is one of the most known Italian physicists that had as students also [...]... Read more »
Marco Ruggieri. (2011) Chiral symmetry restoration and deconfinement in strong magnetic fields. arxiv. arXiv: 1102.1832v1
Kondo, K. (2010) Toward a first-principle derivation of confinement and chiral-symmetry-breaking crossover transitions in QCD. Physical Review D, 82(6). DOI: 10.1103/PhysRevD.82.065024
FRASCA, M. (2009) INFRARED QCD. International Journal of Modern Physics E, 18(03), 693. DOI: 10.1142/S0218301309012781
- February 9, 2011
- 01:03 PM
- 1,486 views
Current Cosmology From Supernova Data.
by Joseph Smidt in The Eternal Universe
Ariel Goobar and Bruno Leibundgu have recently submitted an article to Annual Review of Nuclear and Particle Science summing up our current understanding of physics from the current set of supernova data. We have accrued quite a lot of supernova data over the years and so it is interesting to take a look at how much we have learned. I will not report everything but will post a few interesting
... Read more »
Ariel Goobar, & Bruno Leibundgut. (2011) Supernova cosmology: legacy and future. To Appear In Annual Review of Nuclear and Particle Science. arXiv: 1102.1431v1
- February 8, 2011
- 06:17 AM
- 614 views
A striking clue and some more
by Marco Frasca in The Gauge Connection
My colleagues participating to “The many faces of QCD” in Ghent last year keep on publishing their contributions to the proceedings. This conference produced several outstanding talks and so, it is worthwhile to tell about that here. I have already said about this here, here and here and I have spent some words about the [...]... Read more »
Silvio P. Sorella, David Dudal, Marcelo S. Guimaraes, & Nele Vandersickel. (2011) Features of the Refined Gribov-Zwanziger theory: propagators, BRST soft symmetry breaking and glueball masses. arxiv. arXiv: 1102.0574v1
N. Vandersickel,, D. Dudal,, & S.P. Sorella. (2011) More evidence for a refined Gribov-Zwanziger action based on an effective potential approach. arxiv. info:/1102.0866
Axel Maas. (2011) Scalar-matter-gluon interaction. arxiv. arXiv: 1102.0901v1
Frasca, M. (2006) Strongly coupled quantum field theory. Physical Review D, 73(2). DOI: 10.1103/PhysRevD.73.027701
- February 7, 2011
- 01:30 PM
- 809 views
How can I know if I have cataracts and its severity?
by Pablo Artal in Optics confidential
Lear about a new optical method to detect and grade cataract... and more... Read more »
Artal, P., Benito, A., Pérez, G., Alcón, E., De Casas,, Pujol, J., & Marín, J. (2011) An Objective Scatter Index Based on Double-Pass Retinal Images of a Point Source to Classify Cataracts. PLoS ONE, 6(2). DOI: 10.1371/journal.pone.0016823
- February 4, 2011
- 02:07 PM
- 781 views
CUDA: An update
by Marco Frasca in The Gauge Connection
My activity with CUDA technology by Nvidia and parallel computing is going on (see here). I was able to get up and running the code made available by Pedro Bicudo and Nuno Cardoso (see here) on my machine. This is a code for SU(2) QCD and, currently, these colleagues are working on the SU(3) version. [...]... Read more »
Frigori, R. (2010) Screening masses in quenched (2 1)d(2 1)d Yang–Mills theory: Universality from dynamics?. Nuclear Physics B, 833(1-2), 17-27. DOI: 10.1016/j.nuclphysb.2010.02.021
- February 3, 2011
- 05:38 AM
- 559 views
The Gribov obsession
by Marco Frasca in The Gauge Connection
I have treated the question of Yang-Mills propagators in-depth in my blog being one of my main concerns. There is an important part of the scientific community aimed to understand how these functions behave both at lower energies and overall on the whole energy range. The motivation to write down these few lines today arises [...]... Read more »
Actor, A. (1979) Classical solutions of SU(2) Yang—Mills theories. Reviews of Modern Physics, 51(3), 461-525. DOI: 10.1103/RevModPhys.51.461
R. F. Sobreiro, & S. P. Sorella. (2005) Introduction to the Gribov Ambiguities In Euclidean Yang-Mills Theories. arxiv. arXiv: hep-th/0504095v1
Marco Frasca. (2010) Mapping theorem and Green functions in Yang-Mills theory. arxiv. arXiv: 1011.3643v1
- February 2, 2011
- 01:05 PM
- 1,729 views
The ultimate x-ray machines are ready to go
by Joerg Heber in All That Matters
When you go to the doctor for an x-ray, the nurse or doctor briefly disappear behind a screen, presses a button for a brief moment, and you’re all set. It seems an x-ray takes about a second but the actual exposure times is much faster. Milliseconds more likely. Such speeds seem like almost an eternity [...]... Read more »
Seibert, M., Ekeberg, T., Maia, F., Svenda, M., Andreasson, J., Jönsson, O., Odić, D., Iwan, B., Rocker, A., Westphal, D.... (2011) Single mimivirus particles intercepted and imaged with an X-ray laser. Nature, 470(7332), 78-81. DOI: 10.1038/nature09748
Chapman, H., Fromme, P., Barty, A., White, T., Kirian, R., Aquila, A., Hunter, M., Schulz, J., DePonte, D., Weierstall, U.... (2011) Femtosecond X-ray protein nanocrystallography. Nature, 470(7332), 73-77. DOI: 10.1038/nature09750
- February 1, 2011
- 02:55 PM
- 850 views
How to Plug an Oil Leak with Corn Starch
by Ryan K in A Quantum of Knowledge
One of the biggest, if not THE biggest news story of 2010 was the Deepwater Horizon oil spill. The spill released over 200 million gallons of crude oil into the Gulf of Mexico and is one of the biggest man-made natural disasters in history. The spill lasted for nearly 3 months due to the high [...]... Read more »
Beiersdorfer, P., Layne, D., Magee, E., & Katz, J. (2011) Viscoelastic Suppression of Gravity-Driven Counterflow Instability. Physical Review Letters, 106(5). DOI: 10.1103/PhysRevLett.106.058301
- February 1, 2011
- 06:37 AM
- 424 views
A wonderful confirmation
by Marco Frasca in The Gauge Connection
Contributions to proceedings to Ghent conference “The many faces of QCD” are starting to appear on arxiv and today appeared one of the most striking one I have heard of at that conference: Orlando Oliveira, Pedro Bicudo and Paulo Silva published their paper (see here). This paper represents a true cornerstone for people doing computations [...]... Read more »
O. Oliveira, P. J. Silva, & P. Bicudo. (2011) What Lattice QCD tell us about the Landau Gauge Infrared Propagators. arxiv. arXiv: 1101.5983v1
FRASCA, M. (2008) Infrared gluon and ghost propagators. Physics Letters B, 670(1), 73-77. DOI: 10.1016/j.physletb.2008.10.022
FRASCA, M. (2009) MAPPING A MASSLESS SCALAR FIELD THEORY ON A YANG–MILLS THEORY: CLASSICAL CASE. Modern Physics Letters A, 24(30), 2425. DOI: 10.1142/S021773230903165X
Marco Frasca. (2008) Infrared behavior of the running coupling in scalar field theory. arxiv. arXiv: 0802.1183v4
topics
join us!
Do you write about peer-reviewed research in your blog? Use ResearchBlogging.org to make it easy for your readers — and others from around the world — to find your serious posts about academic research.
If you don't have a blog, you can still use our site to learn about fascinating developments in cutting-edge research from around the world.
