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optical lattice News
Optical Moiré Lattices Produce Solitons
SHANGHAI, Oct. 14, 2020 — Researchers from Jiao Tong University discovered that optical moiré lattices can produce solitons — self-trapped solitary waves — at extremely low power levels. The research establishes potential to explore nonlinear phenomena such as four-wave mixing and second-harmonic generation. The research stems from an earlier discovery in Fangwei Ye’s lab, in which his team discovered a way to stop the spreading of light and localize a laser into a tight spot using
Spectroscopy, Microscopy Allow Precise Imaging of Optical Frequencies
BOULDER, Colo., March 6, 2018 — An imaging technique combines spectroscopy with high-resolution microscopy to produce rapid, precise measurements of quantum behavior in an atomic clock. Physicists believe the technique could improve atomic clock precision and provide a path toward...
Optical gratings could make quantum tech portable
GLASGOW, Scotland, and LONDON – A microfabricated chip that produces ultracold atoms could lead to portable, ultraprecise clocks and quantum sensors. Many of the most accurate measurement devices, including atomic clocks, work by observing how atoms transfer between individual...
Optical Gratings Could Make Quantum Tech Portable
GLASGOW, Scotland, & LONDON, May 10, 2013 — A microfabricated chip that produces ultracold atoms could lead to portable, ultraprecise clocks and quantum sensors. Many of the most accurate measurement devices, including atomic clocks, work by observing how atoms transfer between individual...
Quantum Effects Observed in Optomechanical System
BERKELEY, Calif., Aug. 21, 2012 — The first direct observations of distinctly quantum optical effects — amplification and squeezing — have been recorded in an optomechanical system. The step forward points the way to low-power quantum optical devices and enhanced...
Many-body system beats computer in simulating quantum dynamics
MUNICH – A recent experiment has shown that a many-body system of ultracold atoms can be used as a quantum simulator for experiments where classical computers fail. This also allows physicists to have a better understanding of how particles tunnel, and it...
Many-Body System Beats Computer in Simulating Quantum Dynamics
MUNICH, Germany, March 29, 2012 — A recent experiment has shown that a many-body system of ultracold atoms can be used as a quantum simulator for experiments where classical computers fail. This also allows physicists to have a better understanding of how particles tunnel, and it...
Giant Atoms Trapped with 90% Efficiency
ANN ARBOR, Mich., Dec. 29, 2011 — With an “egg carton” of laser light, physicists can trap giant Rydberg atoms with up to 90 percent efficiency. The achievement could advance computing and terahertz imaging and detection devices, among other applications.
Trapping Charged Particles with Laser Light
GARCHING, Germany, Oct. 27, 2010 — In the past decades, setups for trapping single particles have played a key role in high precision quantum measurements because they allow for an ultimate control of all important experimental parameters. However, until now scientists had to choose...
Quantum Signals Converted to Telecom Wavelengths
ATLANTA, Sept. 29, 2010 — Using optically dense, ultracold clouds of rubidium atoms, advances have been made in three key elements needed for quantum information systems – including a technique for converting photons carrying quantum data to wavelengths that can be...
Quantum Particles in Perfect Order
GARCHING, Germany, Aug. 20, 2010 — For the first time a team around Stefan Kuhr and Immanuel Bloch at Max Planck Institute of Quantum (MPQ) has now succeeded in observing — atom by atom, lattice site by lattice site — single-atom resolved images of a highly correlated...
Lasers Pin Atoms in Order
INNSBRUCK, Austria, July 29, 2010 — A fundamental physical phenomena, whereby an arbitrarily weak perturbation causes atoms to build an organized structure from an initially unorganized one, has been demonstrated for the first time. Physicists can observe quantum mechanical phase...
Exotic Multibody Collisions Revealed
GARCHING, Germany, May 14, 2010 — At extremely low temperatures atoms can aggregate into so-called Bose Einstein condensates (BEC) forming coherent laser-like matter waves. Due to interactions between the atoms fundamental quantum dynamics emerge and give rise to periodic collapses...
Better Rydberg Atom Trap Built
ANN ARBOR, Mich., May 11, 2010 — In an achievement that could help enable fast quantum computers, University of Michigan physicists have built a better Rydberg atom trap. Rydberg atoms are highly excited, nearly-ionized giants that can be thousands of times larger than their...
Atoms Fooled by Fake Field
GAITHERSBURG, Md., Dec. 2, 2009 -- For the first time, physicists have used laser light to create "synthetic magnetism," an exotic condition in which neutral atoms suddenly begin to behave as if they were charged particles interacting with a magnetic field – even though no such field...
$5 Million Award
Dec 1, 2009 — A team led by Rice University of Houston has won a three-year grant from the Army Research Office, with funding from DARPA. The group, representing seven universities, will build a simulator to investigate high-temperature superconductivity using...
Yb Tops Cesium in Superclock
GAITHERSBERG, Md., Aug. 12, 2009 – An experimental atomic clock based on ytterbium atoms is about four times more accurate than it was several years ago, giving it a precision comparable to that of the NIST-F1 cesium fountain clock, the nation's civilian time standard. Scientists at...
Fermions Boost Atomic Clock
GAITHERSBURG, Md., April 16, 2009 – Physicists at JILA and NIST-Boulder, both in Colorado, have controlled collisions between neutral strontium atoms called fermions, an advance that could lead to more accurate atomic clocks.
Quantum Gases Made Visible
MAINZ, Germany, Oct. 22, 2008 – Scientists at the Johannes Gutenberg University Mainz have, for the first time, succeeded in rendering the spatial distribution of individual atoms in a Bose-Einstein condensate visible. Bose-Einstein condensates are small, ultracold gas clouds...
Molecules Take Step Toward Use as Quantum Bits
GARCHING, Germany, Sept. 25, 2006 -- By creating an optical lattice out of several superimposed laser beams, physicists have succeeded in arranging and keeping molecules in a regular array, an important step toward creating a state in which they could possibly store and exchange...
Degenerate Fermi Gas Studied in Three-Dimensional Optical Lattice
Apr 1, 2005 — A team of physicists at the Swiss Federal Institute of Technology in Zurich, Switzerland, has loaded a degenerate Fermi gas into a three-dimensional optical lattice and studied its response to changes in the strength of the trapping lasers and of an...
(21 results found)
April 2024
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