Search results for laser:
Does weak equivalence break down at the quantum level?
Dec 08, 2009 |
4.5 / 5 (24) |
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(PhysOrg.com) -- One of the givens in physics is the weak equivalence principle. This principle has been considered solid since Einstein proposed that it is not possible to detect the difference between uniform acceleration ...
Scientists Generate Black Hole Radiation in the Lab
Dec 07, 2009 |
4.2 / 5 (26) |
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(PhysOrg.com) -- Due to their violent nature and long distance from Earth, black holes and their surroundings are very difficult to study. Currently, the main method to observe a black hole is to use an X-ray ...
Using lasers to cool and manipulate molecules
Dec 07, 2009 |
5 / 5 (9) |
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(PhysOrg.com) -- "For years, we have been using laser cooling to trap and manipulate atoms," David DeMille tells PhysOrg.com. "This has been very useful for both basic science and many applications. Recent ...
Building a more versatile laser
Nov 16, 2009 |
4.5 / 5 (19) |
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(PhysOrg.com) -- One of the drawbacks associated with using semiconductor lasers is that many of them can only produce a beam of a single wavelength, and can only send that beam in one direction at a time. ...
Scientists Make Ink Disappear, Make Paper Reusable
Oct 27, 2009 |
3.1 / 5 (16) |
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(PhysOrg.com) -- Despite ongoing efforts to save the trees, many offices print high volumes of paper documents on a daily basis. Although many companies encourage paper recycling, both disposing of and recycling ...
Physicists Investigate Unusual Four-Qubit Entanglement
Sep 30, 2009 |
4.6 / 5 (19) |
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(PhysOrg.com) -- For the first time, physicists have experimentally demonstrated a four-qubit bound-entangled state - a peculiar form of entanglement that cannot be distilled (optimized) by the usual means. ...
Buffer gas cooling could open up the field of ultracold physics
Sep 17, 2009 |
4.8 / 5 (23) |
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(PhysOrg.com) -- "Scientists have been making Bose-Einstein Condensates [BECs] for nearly 15 years," Charlie Doret tells PhysOrg.com. "Essentially all BEC research to date, however, begins with laser cooling. Unfortunately, ...
Fine-tuned: A wholly new approach to tuning a laser's frequency
Dec 04, 2009 |
4.5 / 5 (10) |
2
(PhysOrg.com) -- For more than 30 years, scientists have been trying to harness the power of terahertz radiation. Tucked between microwaves and infrared rays on the electromagnetic spectrum, terahertz rays ...
Flight of fancy: MIT autonomous mini-helicopter solves one tough challenge
Dec 03, 2009 |
4.6 / 5 (13) |
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In its first 18 years, the Association for Unmanned Vehicle Systems International’s annual aerial-robotics competition posed four successive challenges, which robotics researchers had to meet using entirely ...
Lasers used to make first boron-nitride nanotube yarn (w/ Video)
Nanotechnology / Nanomaterials
Dec 02, 2009 |
4.8 / 5 (14) |
2
(PhysOrg.com) -- Researchers have used lasers to create the first practical macroscopic yarns from boron nitride fibers, opening the door for an array of applications, from radiation-shielded spacecraft to ...
Researchers create 'synthetic magnetic fields' for neutral atoms
Dec 02, 2009 |
4.9 / 5 (15) |
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(PhysOrg.com) -- Achieving an important new capability in ultracold atomic gases, researchers at the Joint Quantum Institute, a collaboration of the National Institute of Standards and Technology and the University ...
Researchers demonstrate 100-watt-level mid-infrared lasers
Dec 01, 2009 |
4.7 / 5 (12) |
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Northwestern University researchers have achieved a breakthrough in quantum cascade laser output power, delivering 120 watts from a single device at room temperature.
Selling chip makers on optical computing
Nov 24, 2009 |
4.6 / 5 (11) |
1
(PhysOrg.com) -- Computer chips that transmit data with light instead of electricity consume much less power than conventional chips, but so far, they've remained laboratory curiosities. Professors Vladimir ...
Close-up movie shows hidden details in the birth of super-suns (w/ Video)
Nov 16, 2009 |
4.8 / 5 (10) |
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(PhysOrg.com) -- The constellation of Orion is a hotbed of massive star formation, most prominently in the Great Nebula that sits in Orion's sword. The glowing gas of the Nebula is powered by a group of young ...
Creating 3D models with a simple webcam (w/ Video)
Technology / Computer Sciences
Nov 11, 2009 |
5 / 5 (25) |
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(PhysOrg.com) -- Constructing virtual 3D models usually requires heavy and expensive equipment, or takes lengthy amounts of time. A group of researchers at the University of Cambridge, Qi Pan, Dr Gerhard Reitmayr ...
