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All posts; Tags Include "Atomic Physics"

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  • August 22, 2016
  • 11:11 PM

Measuring altitude — with clocks?

by Jens Wilkinson in It Ain't Magic

Measuring altitude using atomic clocks seems like a crazy idea, but it’s already being done at RIKEN in Japan.... Read more »

Takano, T., Takamoto, M., Ushijima, I., Ohmae, N., Akatsuka, T., Yamaguchi, A., Kuroishi, Y., Munekane, H., Miyahara, B., & Katori, H. (2016) Geopotential measurements with synchronously linked optical lattice clocks. Nature Photonics. DOI: 10.1038/nphoton.2016.159  

  • May 24, 2016
  • 10:02 AM

Should Biologists be Guided by Beauty?

by Jalees Rehman in The Next Regeneration

One key characteristic of a beautiful scientific theory is the simplicity of the underlying concepts. According to Weinberg, Einstein's theory of gravitation is described in fourteen equations whereas Newton's theory can be expressed in three. Despite the appearance of greater complexity in Einstein's theory, Weinberg finds it more beautiful than Newton's theory because the Einsteinian approach rests on one elegant central principle – the equivalence of gravitation and ........ Read more »

Dietrich, M., Ankeny, R., & Chen, P. (2014) Publication Trends in Model Organism Research. Genetics, 198(3), 787-794. DOI: 10.1534/genetics.114.169714  

Weinberg, Steven. (1992) Dreams of a Final Theory . Vintage Books. info:/

  • September 17, 2015
  • 09:00 AM

The Martian: Getting Home Is Just Half The Problem

by Mark Lasbury in The 'Scope

"The Martian" movie opens soon! It's about an astronaut stranded on Mars who is trying to survive and find a way to get back home. But today, we humans here on Earth still have to think of clever ways to survive a trip to the red planet in the first place.... Read more »

  • March 31, 2015
  • 08:00 AM

Shields Up! Lay In A Course For Mars

by Mark E. Lasbury in The 'Scope

Deflector shields allowed Star Trek and other sci-fi franchises to have long space battles. Without them, one good strike and everyone was dead – that wouldn’t lend itself to sequels.

We don’t need shields for space battles yet, but we do need them to get to Mars. Cosmic radiation will kill or injure every astronaut unless we can deflect the radiation away from the spacecraft. We’re just about to build real deflectors, and our teachers are the magnetic fields we find ........ Read more »

  • March 10, 2015
  • 07:00 AM

Pulling Us Toward Tractor Beams

by Mark E. Lasbury in The 'Scope

Tractor beams pulling space ships are things of science fiction, but tractor beams pulling small objects on Earth are science fact. Beams usually push things away with their force, but we have learned to manipulate them so that they push things back to the source – we can do it with water, sound and even laser light.... Read more »

Shvedov, V., Davoyan, A., Hnatovsky, C., Engheta, N., & Krolikowski, W. (2014) A long-range polarization-controlled optical tractor beam. Nature Photonics, 8(11), 846-850. DOI: 10.1038/nphoton.2014.242  

Mo Li, W. H. P. Pernice, & H. X. Tang. (2009) Tunable bipolar optical interactions between guided lightwaves. Nature Photonics. arXiv: 0903.5117v1

Démoré CE, Dahl PM, Yang Z, Glynne-Jones P, Melzer A, Cochran S, MacDonald MP, & Spalding GC. (2014) Acoustic tractor beam. Physical review letters, 112(17), 174302. PMID: 24836252  

Punzmann, H., Francois, N., Xia, H., Falkovich, G., & Shats, M. (2014) Generation and reversal of surface flows by propagating waves. Nature Physics, 10(9), 658-663. DOI: 10.1038/nphys3041  

Ruffner DB, & Grier DG. (2012) Optical conveyors: a class of active tractor beams. Physical review letters, 109(16), 163903. PMID: 23215079  

  • March 3, 2015
  • 08:00 AM

Star Trek Phasers, Coming To Us Sooner or Laser

by Mark E. Lasbury in The 'Scope

Can we make a Star Trek phaser? In a classic example of life imitating art, the militaries of many countries are actively pursuing such directed energy weapons. So far, we’ve developed high-energy lasers and masers, particle beams, and something that looks a lot like an aimed lightning bolt. But our versions are huge, what must be overcome to make hand-held versions?... Read more »

Shao, L., Cline, D., Ding, X., Ho, Y., Kong, Q., Xu, J., Pogorelsky, I., Yakimenko, V., & Kusche, K. (2013) Simulation prediction and experiment setup of vacuum laser acceleration at Brookhaven National Lab-Accelerator Test Facility. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 25-29. DOI: 10.1016/j.nima.2012.09.053  

Bartal, T., Foord, M., Bellei, C., Key, M., Flippo, K., Gaillard, S., Offermann, D., Patel, P., Jarrott, L., Higginson, D.... (2011) Focusing of short-pulse high-intensity laser-accelerated proton beams. Nature Physics, 8(2), 139-142. DOI: 10.1038/nphys2153  

Oxborrow, M., Breeze, J., & Alford, N. (2012) Room-temperature solid-state maser. Nature, 488(7411), 353-356. DOI: 10.1038/nature11339  

Peralta, E., Soong, K., England, R., Colby, E., Wu, Z., Montazeri, B., McGuinness, C., McNeur, J., Leedle, K., Walz, D.... (2013) Demonstration of electron acceleration in a laser-driven dielectric microstructure. Nature, 503(7474), 91-94. DOI: 10.1038/nature12664  

  • February 17, 2015
  • 07:05 AM

I'll Beam Right Over

by Mark E. Lasbury in The 'Scope

Star Trek’s 50th anniversary is next year. Wouldn’t transporting a person to the ISS be a great way to celebrate? Well, there are a couple of problems to overcome, but we’re on our way. We have recently learned how to transport information and light from one place to another, without it ever existing anywhere in between! And this will help us make quantum computers that will be able to transport all the information contained in every atom of your body.... Read more »

Ma, X., Herbst, T., Scheidl, T., Wang, D., Kropatschek, S., Naylor, W., Wittmann, B., Mech, A., Kofler, J., Anisimova, E.... (2012) Quantum teleportation over 143 kilometres using active feed-forward. Nature, 489(7415), 269-273. DOI: 10.1038/nature11472  

Yokoyama, S., Ukai, R., Armstrong, S., Sornphiphatphong, C., Kaji, T., Suzuki, S., Yoshikawa, J., Yonezawa, H., Menicucci, N., & Furusawa, A. (2013) Ultra-large-scale continuous-variable cluster states multiplexed in the time domain. Nature Photonics, 7(12), 982-986. DOI: 10.1038/nphoton.2013.287  

  • February 10, 2015
  • 07:00 AM

Sometimes Warped Thinking Is A Good Thing

by Mark E. Lasbury in The 'Scope

As Star Trek’s 50th anniversary approaches, are we getting closer to traveling at light speed? Believe it or not – yes, we are. We have begun to understand and harness the power of antimatter, and the plasma bubble-driven warp drive has moved from silly idea to serious consideration – so much so that NASA has designed a warp drive ship, the IXS Enterprise, of course.... Read more »

S. Beghella-Bartoli, P.M. Bhujbal, A. Nas. (2015) Confirmation of Santilli's detection of antimatter galaxies via a telescope with concave lens. America Journal of Modern Physics, 4(1), 34. info:/

Ganiev, Y., Gordeev, V., Krasilnikov, A., Lagutin, V., Otmennikov, V., & Panasenko, A. (2000) Aerodynamic Drag Reduction by Plasma and Hot-Gas Injection. Journal of Thermophysics and Heat Transfer, 14(1), 10-17. DOI: 10.2514/2.6504  

Ronan Keane, & Wei-Ming Zhang. (2012) Beamed Core Antimatter Propulsion: Engine Design and Optimization. J.Br.Interplanet.Soc. arXiv: 1205.2281v2

  • November 30, 2014
  • 06:36 AM

Graphene is the New Kevlar

by Viputheshwar Sitaraman in Draw Science

Graphene is twice as strong as kevlar, extremely light, and can absorb mach 9 impacts with atom-thick layers. [Infographic]... Read more »

  • February 20, 2014
  • 10:17 PM

Smart Materials from Nanotechnology for Global Challenges

by JNSM in JScholar Publishers

There are several open challenges that our society has to address in the near future: produce sufficient amounts of clean energy from renewable sources, design new technologies that enable a sustainable economic growth, address some relevant environmental issues like quality of air and water or waste recycling, improve our standard of life via more accurate diagnostic tools and new medical treatments, just to mention a few. Most of these challenges deal with the design, synthesis, characterizati........ Read more »

Gianfranco Pacchioni. (2014) Smart Materials from Nanotechnology for Global Challenges. Journal of Nanotechnology and Smart Materials, 1(1), 1-1. info:/1: 101

  • February 2, 2014
  • 01:11 PM

Back to work

by Marco Frasca in The Gauge Connection

I would like to have a lot more time to write on my blog. Indeed, time is something I have no often and also the connection is not so good as I would like in the places I spend most of it. So, I take this moment to give an update of what I have […]... Read more »

Kuroda N, Ulmer S, Murtagh DJ, Van Gorp S, Nagata Y, Diermaier M, Federmann S, Leali M, Malbrunot C, Mascagna V.... (2014) A source of antihydrogen for in-flight hyperfine spectroscopy. Nature communications, 3089. PMID: 24448273  

M. W. Ray,, E. Ruokokoski,, S. Kandel,, M. Möttönen,, & D. S. Hall. (2014) Observation of Dirac monopoles in a synthetic magnetic field. Nature, 657-660. DOI: 10.1038/nature12954  

  • November 11, 2013
  • 01:01 PM

Let’s Explore Quantum Teleportation

by Jason Carr in Wired Cosmos

Quantum teleportation is perhaps the closest that modern technology has come to developing a sort of teleporter for transmitting physical objects across distances without the use of some physical method of moving them. Quantum teleportation involves transmitting the exact state that an atom or photon exists in, and then using this data at a different … Read More →... Read more »

Satyabrata Adhikari, A S Majumdar, Dipankar Home, A K Pan, & P Joshi. (2012) Quantum teleportation using non-orthogonal entangled channels. Phys. Scr. DOI: 10.1088/0031-8949/85/04/045001  

  • June 15, 2013
  • 04:10 PM

Return in Paris

by Marco Frasca in The Gauge Connection

After two years since the last edition, I was back in Paris to participate to the Twelfth Workshop on Non-perturbative Quantum Chromodynamics. The conference is organized by high-energy group at Brown University and held at Institut d’Astrophysique de Paris. Professor Chung-I Tan and Professor Berndt Mueller from Duke University are the organizers. As it also happened in the precedent edition, […]... Read more »

Marco Frasca. (2011) Chiral symmetry in the low-energy limit of QCD at finite temperature. Phys. Rev. C 84, 055208 (2011). arXiv: 1105.5274v4

D. Gomez Dumm, & N. N. Scoccola. (2004) Characteristics of the chiral phase transition in nonlocal quark models. Phys.Rev. C72 (2005) 014909. arXiv: hep-ph/0410262v2

M. Ruggieri, F. Scardina, S. Plumari, & V. Greco. (2013) Elliptic Flow from Nonequilibrium Color Glass Condensate Initial Conditions. arXiv. arXiv: 1303.3178v1

David Dudal, John Gracey, Silvio Paolo Sorella, Nele Vandersickel, & Henri Verschelde. (2008) A refinement of the Gribov-Zwanziger approach in the Landau gauge: infrared propagators in harmony with the lattice results. Phys.Rev.D78:065047,2008. arXiv: 0806.4348v2

Lieb, E., & Simon, B. (1973) Thomas-Fermi Theory Revisited. Physical Review Letters, 31(11), 681-683. DOI: 10.1103/PhysRevLett.31.681  

Marco Frasca. (2006) Thermodynamic Limit and Decoherence: Rigorous Results. Journal of Physics: Conference Series 67 (2007) 012026. arXiv: quant-ph/0611024v1

  • June 13, 2013
  • 10:04 AM

New Picture of Ice Could Revolutionize Gas Hydrates Understanding, Hydrogen Storage

by dailyfusion in The Daily Fusion

A collaboration between Oak Ridge National Laboratory researchers and a team led by the Carnegie Institution for Science’s Malcolm Guthrie has led to discoveries about how ice behaves under pressure, changing ideas that date back almost 50 years. The findings could alter scientists’ understanding of how the water molecule responds to conditions found deep within planets and could have implications for energy science.... Read more »

Guthrie, M., Boehler, R., Tulk, C., Molaison, J., dos Santos, A., Li, K., & Hemley, R. (2013) Neutron diffraction observations of interstitial protons in dense ice. Proceedings of the National Academy of Sciences. DOI: 10.1073/pnas.1309277110  

  • June 12, 2013
  • 11:58 AM

New Method Images Single Molecules and Atoms

by Akshat Rathi in United Academics

The ultimate dream of nanotechnology is to be able to manipulate matter atom by atom. To do that, we first need to know what they look like. In what could be a major step in that direction, researchers have developed a method that can determine the shape of a single molecule and identify its constituent atoms.

The laws of nature limit what can be seen with the help of light alone. Only objects separated by more than half the wavelength of the light that illuminates it can be observed as separ........ Read more »

Zhang, R., Zhang, Y., Dong, Z., Jiang, S., Zhang, C., Chen, L., Zhang, L., Liao, Y., Aizpurua, J., Luo, Y.... (2013) Chemical mapping of a single molecule by plasmon-enhanced Raman scattering. Nature, 498(7452), 82-86. DOI: 10.1038/nature12151  

  • January 13, 2013
  • 07:44 AM

Measuring mass by telling the time

by Joerg Heber in All That Matters

How do you measure mass with high precision? This is not an easy question, as it is very difficult to measure the weight of something with the same ultra-high precision with which atomic clocks measure time. To this day, the kilogram is defined by a piece of metal made of platinum and iridium that is stored in Paris. [...]... Read more »

Lan, S., Kuan, P., Estey, B., English, D., Brown, J., Hohensee, M., & Muller, H. (2013) A Clock Directly Linking Time to a Particle's Mass. Science. DOI: 10.1126/science.1230767  

  • January 3, 2013
  • 10:18 PM

Atoms at negative absolute temperatures

by Joerg Heber in All That Matters

Usually we tend to think about temperature as being related to the motion of atoms. At lower temperatures, atomic motions slow down. Absolute zero, defined as zero Kelvin or −273.15 degrees Celsius, then is the point where all atomic motion stops. But what comes beyond that, does something like a negative absolute temperature exist? Indeed, as Ulrich Schneider [...]... Read more »

Braun, S., Ronzheimer, J., Schreiber, M., Hodgman, S., Rom, T., Bloch, I., & Schneider, U. (2013) Negative Absolute Temperature for Motional Degrees of Freedom. Science, 339(6115), 52-55. DOI: 10.1126/science.1227831  

  • December 19, 2012
  • 06:00 PM

what alcohol can tell us about the fate of the universe

by Greg Fish in weird things

Once upon a time, we looked at an explanation for dark matter involving a theory about how all matter around us could decay over 6.6 × 10^33 years and noted that there’s a controversy as to whether protons actually decay. To help settle this, astronomers took advantage of the fact that telescopes are relativistic time machines, and peered through them at a galaxy known as PKS 1830-211 — a name only a scientist could love — that just so happens to be a gravitational lens a........ Read more »

  • November 12, 2012
  • 06:54 AM

CERN collider could be world’s fastest stopwatch

by Flora Malein in

The clock would keep time based on extremely short light pulses given out when ‘heavy ions’, nuclei that belong to heavy atoms such as lead, are smashed together at speed within the collider. To read more click here. Sources:  Ipp, A., & Somkuti, P. (2012). Yoctosecond Metrology Through Hanbury Brown–Twiss Correlations from a Quark-Gluon Plasma [...]... Read more »

  • March 22, 2012
  • 02:52 PM

Viewing Nanoparticles in 3D

by Jason Carr in Wired Cosmos

UCLA researchers are now able to peer deep within the world’s tiniest structures to create three-dimensional images of individual atoms and their positions. Their research, published March 22 in the journal Nature (cited below), presents a new method for directly measuring the atomic structure of nanomaterials. “This is the first experiment where we can directly see local [...]... Read more »

M. C. Scott, Chien-Chun Chen, Matthew Mecklenburg, Chun Zhu, Rui Xu, Peter Ercius, Ulrich Dahmen, B. C. Regan, & Jianwei Miao. (2011) Electron tomography at 2.4 Å resolution. Nature. arXiv: 1108.5350v4

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