
Space Science Image of the Week: NASA’s Galileo spacecraft shares a view of Jupiter’s moon Callisto, one of the worlds that will be explored by ESA’s Juice mission
Week In Images
Our week through the lens: 19-23 January 2015
Holographic Generation of Highly Twisted Electron Beams
Author(s): Vincenzo Grillo, Gian Carlo Gazzadi, Erfan Mafakheri, Stefano Frabboni, Ebrahim Karimi, and Robert W. Boyd
Researchers generated an electron beam with very high orbital angular momentum—potentially good for atomic-scale images of the magnetism in materials.
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[Phys. Rev. Lett. 114, 034801] Published Fri Jan 23, 2015
Integral manoeuvres for the future

Since 2002, ESA’s Integral spacecraft has been observing some of the most violent events in the Universe, including gamma-ray bursts and black holes. While it still has years of life ahead, its fuel will certainly run out one day.
Satellites catch Austfonna shedding ice
Rapid ice loss in a remote Arctic ice cap has been detected by the Sentinel-1A and CryoSat satellites.
Getting to know Rosetta’s comet
The spacecraft is revealing Comet 67P/Churyumov-Gerasimenko as having a remarkable array of surface features and with many processes contributing to its activity, painting a complex picture of its evolution.
Helicopter Could Be ‘Scout’ for Mars Rovers
A proposed helicopter could triple the distances that Mars rovers can drive in a Martian day and help pinpoint interesting targets for study.
Hilltop Panorama Marks Mars Rover’s 11th Anniversary
A panorama from one of the highest elevations that NASA’s Mars Exploration Rover Opportunity has reached in its 11 years on Mars includes the U.S. flag at the summit.
Five Things About NASA’s SMAP
The Soil Moisture Active Passive (SMAP) mission, scheduled for launch on Jan. 29, will measure the moisture in Earth’s soil with greater accuracy and higher resolution than any preceding mission, producing a global map of soil moisture e…
Rosetta Comet ‘Pouring’ More Water into Space
There has been a significant increase in the amount of water “pouring” out of the Rosetta mission’s comet.
Getting to know Rosetta’s comet
Rosetta is revealing its host comet as having a remarkable array of surface features and with many processes contributing to its activity, painting a complex picture of its evolution.
Acoustic Black Hole in a Stationary Hydrodynamic Flow of Microcavity Polaritons
Author(s): H. S. Nguyen, D. Gerace, I. Carusotto, D. Sanvitto, E. Galopin, A. Lemaître, I. Sagnes, J. Bloch, and A. Amo
The flow of hybrid electron-photon states through a black-hole-like “acoustic horizon” may produce an observable signature of Hawking radiation.
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[Phys. Rev. Lett. 114, 036402] Published Thu Jan 22, 2015
Earth from Space

Join us Friday, 23 January, at 10:00 CET for the ‘Earth from Space’ video programme. Discover the largest glacier in the Alps in this week’s programme
Black hole on a diet creates a “changing look” quasar
Until now, scientists have been unable to study both the bright and dim phases of a quasar in a single source.
Chandra celebrates the International Year of Light
Organizations, institutions, and individuals involved in the science and applications of light will be joining together for this yearlong celebration.
Comet close-ups

High-resolution images from ESA’s Rosetta spacecraft reveal an incredible array of surface features on the comet
Mysteries in Nili Fossae

These new images from the high-resolution stereo camera on ESA’s Mars Express show Nili Fossae, one of the most enticing regions on Mars. This ‘graben system’ lies northeast of the volcanic region of Syrtis Major on the northwestern edge of the large Isidis impact basin – and intriguing hints of methane have been seen here.
SPIDER Experiment Touches Down in Antarctica
An instrument called SPIDER just landed after 16 days drifting in the wind above Antarctica, searching for signs of inflation in the earliest moments of the universe.
Gullies on Vesta Suggest Past Water-Mobilized Flows
Protoplanet Vesta, visited by NASA’s Dawn spacecraft from 2011 to 2013, was once thought to be completely dry, incapable of retaining water because of the low temperatures and pressures at its surface.
NASA, Microsoft Collaboration Will Allow Scientists to ‘Work on Mars’
NASA and Microsoft have teamed up to develop software called OnSight, a new technology that will enable scientists to work virtually on Mars using wearable technology called Microsoft HoloLens.
Let there be light
Technology image of the week: a laser from ESA’s Optical Ground Station, illuminating the future of optical communications
Explosive Synchronization in Adaptive and Multilayer Networks
Author(s): Xiyun Zhang, Stefano Boccaletti, Shuguang Guan, and Zonghua Liu
In networks of coupled oscillators, the condition for explosive synchronization is shown not be correlations between the networks’ nodes, but rather that giant synchronized cluster formation is suppressed.
[Phys. Rev. Lett. 114, 038701] Published Wed Jan 21, 2015
Sound Velocity Bound and Neutron Stars
Author(s): Paulo Bedaque and Andrew W. Steiner A conjectured bound on the nonrelativistic sound velocity may be violated in a massive enough neutron star.[Phys. Rev. Lett. 114, 031103] Published Wed Jan 21, 2015
Critical Casimir Forces and Colloidal Phase Transitions in a Near-Critical Solvent: A Simple Model Reveals a Rich Phase Diagram
Author(s): John R. Edison, Nikos Tasios, Simone Belli, Robert Evans, René van Roij, and Marjolein Dijkstra
Computer simulations of the phase behavior of dense colloidal suspensions in a near-critical solvent show that the solvent mediated interactions can drive colloidal gas-liquid and fluid-solid phase transitions.
[Phys. Rev. Lett. 114, 038301] Published Wed Jan 21, 2015
Quasiparticle Interference, Quasiparticle Interactions, and the Origin of the Charge Density Wave in 2H-NbSe_{2}
Author(s): C. J. Arguello, E. P. Rosenthal, E. F. Andrade, W. Jin, P. C. Yeh, N. Zaki, S. Jia, R. J. Cava, R. M. Fernandes, A. J. Millis, T. Valla, R. M. Osgood, Jr., and A. N. Pasupathy
Photoemission and tunneling measurements show that the charge-density wave in 2H-NbSe2 is governed by quasiparticles coupling to phonon modes.
[Phys. Rev. Lett. 114, 037001] Published Wed Jan 21, 2015
Telescope on NASA’s SDO collects its 100 millionth image
The Atmospheric Imaging Assembly, which uses four telescopes working parallel to gather eight images of the Sun, cycles through 10 different wavelengths every 12 seconds.
Telescope To Seek Dust Where Other Earths May Lie
The journey to find worlds ripe for life begins in part by following a trail of dust.
Winter tracking

Human spaceflight and operations image of the week: ESA’s Kiruna station in the snow
Thomas and Luca

Image gallery of ESA astronaut Thomas Pesquet spacewalk training at NASA’s Johnson Space Center with veteran ESA spacewalker Luca Parmitano
Dawn delivers new image of Ceres
This is the first in a series of images that will be taken for navigation purposes during the approach to Ceres.
Dawn delivers new image of Ceres
This is the first in a series of images that will be taken for navigation purposes during the approach to Ceres.
Destination: Moon

An eight-minute film of the past, present and future of Moon exploration, from the lunar cataclysm to ESA’s vision of what lunar exploration could be
Dawn Delivers New Image of Ceres
As NASA’s Dawn spacecraft closes in on Ceres, new images show the dwarf planet at 27 pixels across, about three times better than the calibration images taken in early December.
An ecosystem in a box

An unusual package was delivered to a hotel in Beijing, China, in 1987 containing a batch of blue–green algae that would spend five days in space in a capsule. The ESA-led MELiSSA project was on its way.
A stormy shape-shifter

Space Science Image of the Week: ESA’s Venus Express spacecraft snapped this image in 2007 of a rapidly shape-shifting vortex at Venus’ south pole
NEOWISE: A yearlong look at the sky
The spacecraft discovered and characterized 40 near-Earth objects in the first year after the mission was restarted.
Snapshot of cosmic burst of radio waves
The theories are now that the radio wave burst might be linked to a compact type of object — such as neutron stars or black holes — and the bursts could be connected to collisions or “star quakes.”
Rahvusvaheline valguse aasta 2015 on alanud!
Täna, 19.01.2015 avatakse Pariisis, UNESCO peakorteris rahvusvaheline valguse aasta 2015. Rahvusvahelina valguse aasta toimub Ühendatud Rahvaste Organisatsiooni egiidi all ning on ellu kutsutud valguse ja optiliste tehnoloogiate rolli teadvustamiseks meie igapäevaelus ja inimkonna tuleviku kujunemisel. Võib julgesti öelda, et ilma valguseta ei oleks elu, ilma valguseta ei oleks meil võimalik infot saada ja vahetada. Kui […]
NuSTAR Principal Investigator Receives Astrophysics Prize
The 2015 Rossi Prize has been awarded to Fiona Harrison, the principal investigator of NASA’s Nuclear Spectroscopic Telescope Array, or NuSTAR.
NASA SMAP Observatory Ready for Launch
The launch of NASA’s Soil Moisture Active Passive (SMAP) mission at Vandenberg Air Force Base (VAFB) in California is scheduled for Thursday, Jan. 29.
‘Lost’ 2003 Mars Lander Found by Mars Reconnaissance Orbiter
The Beagle 2 Mars Lander, built by the United Kingdom, has been thought lost on Mars since 2003, but has now been found in images from NASA’s Mars Reconnaissance Orbiter.
DG Briefing replay
Watch the replay of ESA DG’s traditional start-of-year media briefing on the activities for 2015, Friday 16 January.
Week In Images
Our week through the lens: 12-16 January 2015
Three nearly Earth-sized planets found orbiting nearby star
The outermost planet orbits in the “Goldilocks” zone, a region where surface temperatures could be moderate enough for liquid water and perhaps life to exist.
New Horizons begins first stages of Pluto encounter
The “optical navigation” campaign that starts January 25 will mark the first time pictures from the spacecraft will be used to help pinpoint Pluto’s location.
Beagle-2 lander found on Mars

The UK-led Beagle-2 Mars lander, which hitched a ride on ESA’s Mars Express mission and was lost on Mars since 2003, has been found in images taken by a NASA orbiter at the Red Planet.
Rejigging the Cluster quartet

Aiming to study Earth’s ‘bow shock’ in the solar wind, the constellation of Cluster satellites is being rejigged to bring two of the four to within almost touching distance.
NASA’s New Horizons Begins First Stages of Pluto Encounter
NASA’s New Horizons spacecraft is entering the first of several approach phases, culminating July 14 with the first close-up flyby of the dwarf planet Pluto.
NEOWISE: A Yearlong Look at the Sky
A NASA spacecraft using infrared imaging discovered 40 near-Earth objects in one year and observed many others, including a comet that has become this month’s brightest.
Sequence Determines Degree of Knottedness in a Coarse-Grained Protein Model
Author(s): Thomas Wüst, Daniel Reith, and Peter Virnau
The sequence of amino acids in certain biomolecules could be a factor in ensuring that they remain free of knots.
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[Phys. Rev. Lett. 114, 028102] Published Thu Jan 15, 2015
New exoplanet-hunting telescopes achieve first light
The 12 instruments of the Next-Generation Transit Survey will focus on discovering Neptune-sized and smaller planets from Paranal Observatory in Chile.
Asteroid to fly by Earth safely January 26
The flyby of 2004 BL86 will be the closest by any known space rock this large until asteroid 1999 AN10 flies past Earth in 2027.
DG Media Briefing
Watch ESA DG’s traditional start-of-year media briefing on the activities for 2015, Friday 16 January. Streaming starts at 09:00 CET
Remaking the mould
Technology image of the week: this one-piece instrument housing was produced using a 3D printed mould
Crystal-Rich Rock ‘Mojave’ is Next Mars Drill Target
This week, NASA’s Curiosity Mars rover is preparing to drill its second sample of Mount Sharp. An upgraded version of its onboard software is ready for installation next week.
NASA and ESA Celebrate 10 Years Since Titan Landing
Looking back at a tremendous international accomplishment: landing a robotic probe on a moon of Saturn.
Nonlocality and Conflicting Interest Games
Author(s): Anna Pappa, Niraj Kumar, Thomas Lawson, Miklos Santha, Shengyu Zhang, Eleni Diamanti, and Iordanis Kerenidis Quantum nonlocality gives players an advantage in conflicting interest games, as demonstrated by the Battle of the Sexes game implem…
Cavity-Modified Collective Rayleigh Scattering of Two Atoms
Author(s): René Reimann, Wolfgang Alt, Tobias Kampschulte, Tobias Macha, Lothar Ratschbacher, Natalie Thau, Seokchan Yoon, and Dieter Meschede
Two groups have independently isolated two atoms in a single cavity and measured that the collective light output is not simply the sum of single emitters.
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[Phys. Rev. Lett. 114, 023601] Published Wed Jan 14, 2015
Enhanced Quantum Interface with Collective Ion-Cavity Coupling
Author(s): B. Casabone, K. Friebe, B. Brandstätter, K. Schüppert, R. Blatt, and T. E. Northup
Two groups have independently isolated two atoms in a single cavity and measured that the collective light output is not simply the sum of single emitters.
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[Phys. Rev. Lett. 114, 023602] Published Wed Jan 14, 2015
Thermometry via Light Shifts in Optical Lattices
Author(s): M. McDonald, B. H. McGuyer, G. Z. Iwata, and T. Zelevinsky
A new spectroscopic technique provides an order of magnitude improvement in the temperature measurement of ultracold gases in optical lattices.
[Phys. Rev. Lett. 114, 023001] Published Wed Jan 14, 2015
Vega ready to launch spaceplane

On its first launch of the year, Europe’s Vega rocket will loft ESA’s unmanned spaceplane to test reentry technologies for future vehicles.
Asteroid to Fly By Earth Safely on January 26
The January 26 flyby of asteroid 2004 BL86 will be the closest by any known space rock this large until an asteroid flies past Earth in 2027.
NASA Mountaintop Sensor Finds High Methane over LA
NASA instruments on a mountaintop show that Los Angeles’ annual methane emissions are 18 to 61 percent higher than the best previous estimates.
Onset of a Limit Cycle and Universal Three-Body Parameter in Efimov Physics
Author(s): Yusuke Horinouchi and Masahito Ueda A functional renormalization group analysis shows that the three-body behavior of identical bosons is independent of the details of their pairwise short-range interactions.[Phys. Rev. Lett. 114, 025301] Pu…
Ten years at Titan
Celebrating the 10th anniversary of the pioneering Huygens mission to Saturn’s moon Titan, the first successful landing on an outer Solar System world
„Maavärinatuledest” avastatakse uus füüsika
Kui tektoonilised plaadid nihkuvad – üksteise vastu hõõrdudes ja maavärinaid põhjustades –, on nende vahel tavaliselt määrdena toimiv pulbriks hõõrutud kivide kiht. Karen Daniels uurib Põhja-Carolina ülikooli laboratooriumis väikeseid plastkettaid, mis libisevad üksteise peal sarnaselt Maa tektooniliste plaatidega. Daniels ja tema kolleegid uurivad, kas plastkettad ja võib-olla plaatide vahel leiduvad graanulid tekitavad liikumisel akustilisi signaale. Nüüd on […]
Rivers Are Draining Greenland Quickly: NASA-UCLA
Meltwater rivers flowing on Greenland’s frozen surface may contribute as much to global sea level rise as all other processes that drain water from the ice sheet combined.
Orbital Engineering in Symmetry-Breaking Polar Heterostructures
Author(s): Ankit S. Disa, Divine P. Kumah, Andrei Malashevich, Hanghui Chen, Dario A. Arena, Eliot D. Specht, Sohrab Ismail-Beigi, F. J. Walker, and Charles H. Ahn
In transition-metal oxides, the ability to control which atomic orbitals are occupied by electrons could be used to develop materials with new functionalities.
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[Phys. Rev. Lett. 114, 026801] Published Mon Jan 12, 2015
Quantum Critical Transport and the Hall Angle in Holographic Models
Author(s): Mike Blake and Aristomenis Donos The techniques of gauge/gravity duality provide a holographic model explaining the anomalous scaling of resistivity in strange metals.[Phys. Rev. Lett. 114, 021601] Published Mon Jan 12, 2015
Retrieving Time-Dependent Green’s Functions in Optics with Low-Coherence Interferometry
Author(s): Amaury Badon, Geoffroy Lerosey, Albert C. Boccara, Mathias Fink, and Alexandre Aubry
Time dependent Green’s functions are measured at optical frequencies for scattered waves propagating in complex media using low coherence interferometry.
[Phys. Rev. Lett. 114, 023901] Published Mon Jan 12, 2015
ΛΛ Correlation Function in Au+Au Collisions at sqrt[s_{NN}]=200 GeV
Author(s): L. Adamczyk et al. (STAR Collaboration)
A high statistics measurement of the ΛΛ correlation function in heavy-ion collisions at RHIC suggests that the strength of the interaction is weak and provides a new limit on H-dibaryon production.
[Phys. Rev. Lett. 114, 022301] Published Mon Jan 12, 2015
JPL Scientist Alberto Behar Remembered
JPL employees were deeply saddened by the death of Dr. Alberto Behar, who died in the crash of a small plane on Friday, Jan. 10, near Van Nuys Airport in the Los Angeles area.
Will the Real Monster Black Hole Please Stand Up?
New data from NASA’s NuSTAR mission determine which of two supermassive black holes is pouring out X-rays in a colliding pair of galaxies.
Scientists Pinpoint Saturn With Exquisite Accuracy
Signals from NASA’s Saturn-orbiting probe and the keen eyes of a continent-spanning telescope array yield greatly improved knowledge of the “true” center of the Saturn system.
NASA Satellite Set to Get the Dirt on Soil Moisture
A new NASA satellite that will peer into the topmost layer of Earth’s soils to measure the hidden waters that influence our climate is in final preparations for a Jan. 29 launch.
Machines Teach Astronomers About Stars
The same technology that suggests what movies you might like to watch is helping astronomers learn about stars.
NASA Mars Rover Opportunity Climbs to High Point on Rim
NASA’s Mars Exploration Rover Opportunity, continuing to drive while engineers tackle a flash-memory issue, has reached a crater-rim high point on “Cape Tribulation.”
Unusual Light Signal Hints at Distant Black Hole Merger
Scientists have found what appear to be two supermassive black holes in the final stages of a merger, a rare event never seen before.
NASA Robot Plunges Into Volcano to Explore Fissure
Researchers at NASA’s Jet Propulsion Laboratory are developing robots to explore volcanoes.
Tunable Long Range Forces Mediated by Self-Propelled Colloidal Hard Spheres
Author(s): Ran Ni, Martien A. Cohen Stuart, and Peter G. Bolhuis The effective force between two flat objects immersed in a suspension of active colloids can be tuned by changing the activity and density of the colloids. This finding opens the door to …
Observation of a Four-Electron Auger Process in Near-K-Edge Photoionization of Singly Charged Carbon Ions
Author(s): A. Müller, A. Borovik, Jr., T. Buhr, J. Hellhund, K. Holste, A. L. D. Kilcoyne, S. Klumpp, M. Martins, S. Ricz, J. Viefhaus, and S. Schippers
Using a new photon-ion merged-beam setup at PETRA III, DESY, resonant Auger decay in which three electrons are emitted simultaneously is observed in carbon ions.
[Phys. Rev. Lett. 114, 013002] Published Wed Jan 07, 2015
Shot Noise Induced by Nonequilibrium Spin Accumulation
Author(s): Tomonori Arakawa, Junichi Shiogai, Mariusz Ciorga, Martin Utz, Dieter Schuh, Makoto Kohda, Junsaku Nitta, Dominique Bougeard, Dieter Weiss, Teruo Ono, and Kensuke Kobayashi Excess shot noise from a current passing through a potential barrier…
Framing Anomaly in the Effective Theory of the Fractional Quantum Hall Effect
Author(s): Andrey Gromov, Gil Young Cho, Yizhi You, Alexander G. Abanov, and Eduardo Fradkin Anomalies in quantum field theories point to a consistent effective theory for fractional Hall liquids.[Phys. Rev. Lett. 114, 016805] Published Wed Jan 07, 2015
Observation of the Leggett-Rice Effect in a Unitary Fermi Gas
Author(s): S. Trotzky, S. Beattie, C. Luciuk, S. Smale, A. B. Bardon, T. Enss, E. Taylor, S. Zhang, and J. H. Thywissen
Measurements of the transverse spin diffusivity of a unitary Fermi gas show that it behaves as a ‘bad metal’ with transport lifetimes near the quantum limit.
[Phys. Rev. Lett. 114, 015301] Published Wed Jan 07, 2015
Proximity-Induced Ferromagnetism in Graphene Revealed by the Anomalous Hall Effect
Author(s): Zhiyong Wang, Chi Tang, Raymond Sachs, Yafis Barlas, and Jing Shi Placing graphene on an insulating magnetic substrate can make the material ferromagnetic without disturbing its exceptional conductivity.[Phys. Rev. Lett. 114, 016603] Publis…
Smashing results about our nearby galactic neighbors
A new survey indicates that the Magellanic Clouds are bigger and more complex than previously thought.
Volunteer ‘Disk Detectives’ Classify Possible Planetary Habitats
Citizen scientists are busy sifting through images from the WISE mission, logging 1 million potential planetary habitats.
NASA’s Kepler Marks 1,000th Exoplanet Discovery, Uncovers More Small Worlds in Habitable Zones
NASA’s Kepler Space Telescope has, to date, offered scientists more than 4,000 candidate planets — the 1,000th of which was recently verified.
Dark Matter with Pseudoscalar-Mediated Interactions Explains the DAMA Signal and the Galactic Center Excess
Author(s): Chiara Arina, Eugenio Del Nobile, and Paolo Panci A new dark matter model is able to account for the annual dark matter modulation observed by DAMA and the galactic center gamma-ray excess, while remaining compatible with other exclusion lim…
New Project Scientist for Mars Rover
NASA’s Curiosity Mars rover has a new science-team chief who has already helped lead the mission for a decade.
NASA Announces Briefing on New Mission to Track Water in Earth’s Soil
NASA will hold a briefing at 11 a.m. PST (2 p.m. EST) Thursday, Jan. 8, about the upcoming Soil Moisture Active Passive (SMAP) mission.
Experimental Observation of Lee-Yang Zeros
Author(s): Xinhua Peng, Hui Zhou, Bo-Bo Wei, Jiangyu Cui, Jiangfeng Du, and Ren-Bao Liu Imaginary magnetic fields predicted by the fundamental theory of phase transitions can be realized experimentally.[Phys. Rev. Lett. 114, 010601] Published Mon Jan …
Measurement of the Gravity-Field Curvature by Atom Interferometry
Author(s): G. Rosi, L. Cacciapuoti, F. Sorrentino, M. Menchetti, M. Prevedelli, and G. M. Tino
By measuring gravity with cold atoms at three different heights simultaneously, a team determined a new property of a gravitational field.
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[Phys. Rev. Lett. 114, 013001] Published Mon Jan 05, 2015
Spectral Noise Correlations of an Ultrafast Frequency Comb
Author(s): Roman Schmeissner, Jonathan Roslund, Claude Fabre, and Nicolas Treps
The amplitude and phase of noise between different “teeth” in a femotsecond frequency comb is measured using a programmable pulse that can isolate the noise in different frequency regions.
[Phys. Rev. Lett. 113, 263906] Published Wed Dec 31, 2014
Direct Visualization of Conformation and Dense Packing of DNA-Based Soft Colloids
Author(s): Jing Zhang, Paul M. Lettinga, Jan K. G. Dhont, and Emmanuel Stiakakis
A 2D array of magnetic DNA coated colloids shifts from a closed packed circle configuration to close packed hexagons under increasing pressure, with no interpenetration of the DNA coating strands.
[Phys. Rev. Lett. 113, 268303] Published Wed Dec 31, 2014
Anomalous Impact in Reaction-Diffusion Financial Models
Author(s): I. Mastromatteo, B. Tóth, and J.-P. Bouchaud
Financial markets can behave like critical systems in which small perturbations have an anomalously high impact on trading prices.
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[Phys. Rev. Lett. 113, 268701] Published Wed Dec 31, 2014
Technology Innovations Spin NASA’s SMAP into Space
It’s active. It’s passive. And it’s got a big, spinning lasso.
Thermophoretic Forces on DNA Measured with a Single-Molecule Spring Balance
Author(s): Jonas N. Pedersen, Christopher J. Lüscher, Rodolphe Marie, Lasse H. Thamdrup, Anders Kristensen, and Henrik Flyvbjerg
The thermopheretic forces arising from temperature gradients over a single DNA strand have been measured using the DNA strand itself, which effectively acts as a tiny spring balance.
[Phys. Rev. Lett. 113, 268301] Published Tue Dec 30, 2014
Generation and Detection of a Sub-Poissonian Atom Number Distribution in a One-Dimensional Optical Lattice
Author(s): J.-B. Béguin, E. M. Bookjans, S. L. Christensen, H. L. Sørensen, J. H. Müller, E. S. Polzik, and J. Appel
A minimally invasive measurement technique gives a precise, real-time estimate of the number of atoms in a one-dimensional trap.
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[Phys. Rev. Lett. 113, 263603] Published Tue Dec 30, 2014
Dynamic Compression of Single Nanochannel Confined DNA via a Nanodozer Assay
Author(s): Ahmed Khorshid, Philip Zimny, David Tétreault-La Roche, Geremia Massarelli, Takahiro Sakaue, and Walter Reisner
A new experimental system can compress single DNA molecules trapped in a channel using a nanosized spherical plunger.
[Phys. Rev. Lett. 113, 268104] Published Tue Dec 30, 2014

