Physics posts
- February 2, 2012
- 10:35 AM
- 32 views
Numerical evidence for the square root of a Wiener process
by Marco Frasca in The Gauge Connection
Brownian motion is a very kind mathematical object being very keen to numerical simulations. There are a plenty of them for any platform and software so that one is able to check very rapidly the proper working of a given hypothesis. For these aims, I have found very helpful the demonstration site by Wolfram and [...]... Read more »
Marco Frasca. (2012) Quantum mechanics is the square root of a stochastic process. arXiv. arXiv: 1201.5091v2
- January 31, 2012
- 06:04 AM
- 66 views
Quantum mechanics and stochastic processes: Revised paper posted
by Marco Frasca in The Gauge Connection
After having fixed the definition of the extended Itō integral, I have posted a revised version of my paper on arXiv (see here). The idea has been described here. A full account of this story is given here. The interesting aspect from a physical standpoint is the space that is fluctuating both for a Wiener [...]... Read more »
Marco Frasca. (2012) Quantum mechanics is the square root of a stochastic process. arXiv. arXiv: 1201.5091v2
- January 31, 2012
- 06:00 AM
- 63 views
Correcting presbyopia with corneal inlays: ¿reinventing the wheel or the advantages of simplicity?
by Pablo Artal in Optics confidential
A simple method to correct for presbyopia is evaluated...... Read more »
Tabernero, J., Schwarz, C., Fernandez, E., & Artal, P. (2011) Binocular Visual Simulation of a Corneal Inlay to Increase Depth of Focus. Investigative Ophthalmology , 52(8), 5273-5277. DOI: 10.1167/iovs.10-6436
- January 30, 2012
- 05:02 PM
- 49 views
An X-ray laser—sounds cool, but what is it?
by Cath in Basal Science (BS) Clarified
You may have noticed there was a lot of coverage on lasers last week. Some of the headlines really caught my attention: “X-Ray Laser Turns Up the Heat to 3.6 Million Degrees” or “World’s Most Powerful X-Ray Laser Super-Heats Aluminum Foil to 3.6 Million Degrees”. Sounds like an impressive laser, right? I wondered what an [...]... Read more »
Vinko, S., Ciricosta, O., Cho, B., Engelhorn, K., Chung, H., Brown, C., Burian, T., Chalupský, J., Falcone, R., Graves, C.... (2012) Creation and diagnosis of a solid-density plasma with an X-ray free-electron laser. Nature. DOI: 10.1038/nature10746
- January 27, 2012
- 03:42 PM
- 79 views
Evading Piau’s paradox
by Marco Frasca in The Gauge Connection
Disclaimer: This post is somewhat technical. Recently, I posted a paper on arXiv (see here) claiming that quantum mechanics is the square root of a Wiener process. In order to get my results I have to consider some exotic Itō integrals that Didier Piau showed not existent (see here and here). In my argument I [...]... Read more »
Marco Frasca. (2012) Quantum mechanics is the square root of a stochastic process. arXiv. arXiv: 1201.5091v1
- January 26, 2012
- 09:14 PM
- 48 views
Sniffing out Parkinson's disease
by Nsikan Akpan in That's Basic Science
Via my new Nature Network blog, a breathalyzer for Parkinson's disease based on carbon nanotube technology.... Read more »
Tisch, U., Aluf, Y., Ionescu, R., Nakhleh, M., Bassal, R., Axelrod, N., Robertman, D., Tessler, Y., Finberg, J., & Haick, H. (2011) Detection of Asymptomatic Nigrostriatal Dopaminergic Lesion in Rats by Exhaled Air Analysis Using Carbon Nanotube Sensors. ACS Chemical Neuroscience, 2147483647. DOI: 10.1021/cn200093r
- January 25, 2012
- 04:55 PM
- 93 views
do decaying neutrons travel between universes?
by Greg Fish in weird things
According to string theorists, our universe is just one of many in an otherwise infinite cosmos and that all the different universes don't just sit quietly in a vacuum, but actively interact with each other when space and time bend and fold to create the right conditions for different forces and particles to jump between [...]... Read more »
Michael Sarrazin, Guillaume Pignol, Fabrice Petit, & Valery V. Nesvizhevsky. (2012) Experimental limits on neutron disappearance into another braneworld. n/a. arXiv: 1201.3949v1
- January 25, 2012
- 05:22 AM
- 111 views
Quantum mechanics and the square root of Brownian motion
by Marco Frasca in The Gauge Connection
There is a very good reason why I was silent in the past days. The reason is that I was involved in one of the most difficult article to write down since I do research (and are more than twenty years now!). This paper arose during a very successful collaboration with two colleagues of mine: [...]... Read more »
Marco Frasca. (2012) Quantum mechanics is the square root of a stochastic process. arXiv. arXiv: 1201.5091v1
Farina, A., Giompapa, S., Graziano, A., Liburdi, A., Ravanelli, M., & Zirilli, F. (2011) Tartaglia-Pascal’s triangle: a historical perspective with applications. Signal, Image and Video Processing. DOI: 10.1007/s11760-011-0228-6
Grabert, H., Hänggi, P., & Talkner, P. (1979) Is quantum mechanics equivalent to a classical stochastic process?. Physical Review A, 19(6), 2440-2445. DOI: 10.1103/PhysRevA.19.2440
- January 16, 2012
- 09:51 AM
- 179 views
Is this journal for real?
by Neurobonkers in Neurobonkers
This year 134 suspect new journals have appeared from the abyss, all published by the same clandestine company “Scientific & Academic Publishing, USA“. Scientists have been quick to raise the alarm and ruthless in their response.... Read more »
Morrison, Heather. (2012) Scholarly Communication in Crisis. Freedom for scholarship in the internet age. Simon Fraser University School of Communication. info:/
- January 15, 2012
- 02:09 PM
- 103 views
Shrinking magnetic storage devices
by Joerg Heber in All that matters
I now finally got the time to follow-up on last week’s paper in Science by Andreas Heinrich‘s group at IBM on magnetic storage elements that are only a few atoms in size. There have been a few misconceptions in some of the news reports with some being plainly wrong (‘smallest storage device ever made’), and many didn’t [...]... Read more »
Loth, S., Baumann, S., Lutz, C., Eigler, D., & Heinrich, A. (2012) Bistability in Atomic-Scale Antiferromagnets. Science, 335(6065), 196-199. DOI: 10.1126/science.1214131
- January 14, 2012
- 12:35 PM
- 106 views
to boost data density, chill and apply magnetism
by Greg Fish in weird things
Chances are, your computer's current hard drive can store around 500 GB, and if you're a real video editing or graphics enthusiast, you either bought yourself, or customized your computer to have a 1 TB drive. But what if in the same space that your hard drive takes up now, you could host a multi-PB [...]... Read more »
Loth, S., Baumann, S., Lutz, C., Eigler, D., & Heinrich, A. (2012) Bistability in Atomic-Scale Antiferromagnets. Science, 335(6065), 196-199. DOI: 10.1126/science.1214131
- January 14, 2012
- 07:25 AM
- 89 views
Explaining Titan's Alien Weather System
by Kelly Oakes in Basic Space
Underneath Titan’s dense atmosphere lies something rather unusual, by terrestrial standards. Some features of the Saturnian moon, at first glance, might look similar to some features we have on Earth — it is the only other body in the solar system with lakes, and appears to have an active weather system. But instead of water, it’s methane that rains from the skies to fill Titan’s vast lakes, before it evaporates to form clouds that cover the surface. Curiously similar to ........ Read more »
Schneider, T., Graves, S., Schaller, E., & Brown, M. (2012) Polar methane accumulation and rainstorms on Titan from simulations of the methane cycle. Nature, 481(7379), 58-61. DOI: 10.1038/nature10666
- January 13, 2012
- 10:45 AM
- 109 views
counting exoplanets by their gravitational wells
by Greg Fish in weird things
Depending on who you talk to, planets around alien suns are either somewhat rare due to the chaotic nature of planetary formation around infant stars, or even more plentiful than the stars themselves. Since exoplanets are rather small and dim, lost in the glare of their host suns, spotting them takes a lot of time [...]... Read more »
Cassan, A., Kubas, D., Beaulieu, J., Dominik, M., Horne, K., Greenhill, J., Wambsganss, J., Menzies, J., Williams, A., Jørgensen, U.... (2012) One or more bound planets per Milky Way star from microlensing observations. Nature, 481(7380), 167-169. DOI: 10.1038/nature10684
- January 11, 2012
- 05:00 PM
- 37 views
Red giant core spins ten times faster than its surface
by Kelly Oakes in Basic Space
Astronomers have found that the core of a red giant, the type of star that our Sun will eventually become, spins ten times as fast as its surface. And it happens because of a phenomenon we can see here on Earth, too.... Read more »
Beck, P., Montalban, J., Kallinger, T., De Ridder, J., Aerts, C., García, R., Hekker, S., Dupret, M., Mosser, B., Eggenberger, P.... (2011) Fast core rotation in red-giant stars as revealed by gravity-dominated mixed modes. Nature, 481(7379), 55-57. DOI: 10.1038/nature10612
- January 10, 2012
- 11:26 AM
- 74 views
Science keeps frozen puck afloat—not magic!
by Cath in Basal Science (BS) Clarified
See the frozen puck that appears to be floating in mid-air? Physics is what is holding it there, well magnetic levitation to be exact.... Read more »
R.W. Hill. (2011) Superconducting Levitation. Physics in Canada, 67(2), 136. info:/
Holmer, P. (2003) Faster than a speeding bullet train. IEEE Spectrum, 40(8), 30-34. DOI: 10.1109/MSPEC.2003.1222045
- January 9, 2012
- 09:13 AM
- 68 views
Giant optical gain in rare-earth-ion-doped amplifiers
by Dave Flanagan in materialsdave.com
Scientists at the University of Twente have developed high performance rare-earth-ion-doped optical fiber amplifiers.... Read more »
Geskus, D., Aravazhi, S., García-Blanco, S., & Pollnau, M. (2011) Giant Optical Gain in a Rare-Earth-Ion-Doped Microstructure. Advanced Materials. DOI: 10.1002/adma.201101781
- January 9, 2012
- 01:00 AM
- 109 views
View to a Blood Vessel
by Nsikan Akpan in That's Basic Science
A microscopic camera for mapping atherosclerotic plaques.... Read more »
Yoo, H., Kim, J., Shishkov, M., Namati, E., Morse, T., Shubochkin, R., McCarthy, J., Ntziachristos, V., Bouma, B., Jaffer, F.... (2011) Intra-arterial catheter for simultaneous microstructural and molecular imaging in vivo. Nature Medicine, 17(12), 1680-1684. DOI: 10.1038/nm.2555
- January 7, 2012
- 10:34 PM
- 116 views
So, what is a “temporal cloak”, anyway?
by gg in Skulls in the Stars
I’ve been saying for a few years that optical science has entered a truly remarkable new era: instead of asking the question, “What are the physical limitations on what light can do?”, we are now asking, “How can we make … Continue reading →... Read more »
Fridman, M., Farsi, A., Okawachi, Y., & Gaeta, A. (2012) Demonstration of temporal cloaking. Nature, 481(7379), 62-65. DOI: 10.1038/nature10695
- January 7, 2012
- 05:01 PM
- 101 views
Nothingness in science: Lisi’s case
by Marco Frasca in The Gauge Connection
People working in science are well aware that severe criteria are generally used to scrutinize their work, work that must appear on reputable journals where a review by peers decides the goodness or the rejection. This is generally the start of a procedure that can last several years and that should end up with the [...]... Read more »
Marco Frasca. (2009) Mapping a Massless Scalar Field Theory on a Yang-Mills Theory: Classical Case. Mod. Phys. Lett. A 24, 2425-2432 (2009). arXiv: 0903.2357v4
Jacques Distler, & Skip Garibaldi. (2009) There is no "Theory of Everything" inside E8. Commun.Math.Phys.298:419-436,2010. arXiv: 0905.2658v3
- January 7, 2012
- 05:12 AM
- 105 views
Hamster power to help solve energy crisis? [video] | @GrrlScientist
by GrrlScientist in GrrlScientist
Children's pet hamsters can help solve the world's energy crisis! ... Read more »
Yang, R., Qin, Y., Li, C., Zhu, G., & Wang, Z. (2009) Converting Biomechanical Energy into Electricity by a Muscle-Movement-Driven Nanogenerator. Nano Letters, 9(3), 1201-1205. DOI: 10.1021/nl803904b
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.
