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Physics

Time & frequency

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New NIST Time Code to Boost Reception for Radio-Controlled Clocks

March 5, 2013

The National Institute of Standards and Technology (NIST) is changing the way it broadcasts time signals that synchronize radio-controlled "atomic" clocks and...

Photons Emitted by Quantum Dots Can be Made Indistinguishable Through Quantum Frequency Conversion

December 19, 2012

An international collaboration led by researchers from the NIST Center for Nanoscale Science and Technology has demonstrated the ability to make photons emitted...

NIST Mini-sensor Measures Magnetic Activity in Human Brain

April 19, 2012

A miniature atom-based magnetic sensor developed by the National Institute of Standards and Technology (NIST) has passed an important research milestone by...

NIST/CU 'Star Comb' Joins Quest for Earthlike Planets

March 6, 2012

If there is life on other planets, a laser frequency comb developed at the National Institute of Standards and Technology (NIST) may help find it. Such a comb—a...

All Time, All the Time: Improving NIST Radio

October 3, 2011

For huge numbers of people in North America who spend their days in schools, offices, stores, factories and public facilities, the time of their lives comes...

Photo of UC graduate student Matt Kirchner fine-tuning an ultra-stable microwave generator at NIST

A Quiet Phase: NIST Optical Tools Produce Ultra-low-noise Microwave Signals

June 27, 2011

By combining advanced laser technologies in a new way, physicists at the National Institute of Standards and Technology (NIST) have generated microwave signals...

Photo of an advanced laser in the back of a car

Drive Test: NIST Super-stable Laser Shines in Minivan Experiment

May 10, 2011

In a step toward taking the most advanced atomic clocks on the road, physicists at the National Institute of Standards and Technology (NIST) have designed and...

New Calculations on Blackbody Energy Set the Stage for Clocks with Unprecedented Accuracy

May 6, 2011

A team of physicists from the United States and Russia announced today that it has developed a means for computing, with unprecedented accuracy, a tiny...

Here Comes the Sun: NIST Radio Station WWVH in Hawaii Adds Solar Power

February 15, 2011

The sun is now a significant power source for the National Institute of Standards and Technology (NIST) radio station WWVH, which broadcasts time of day, marine...

two red bars: one horizontal and one vertical. Green cones come out of the middle where they intersect.

Quantum Quirk: JILA Scientists Pack Atoms Together to Prevent Collisions in Atomic Clock

February 3, 2011

BOULDER, Colo.—In a paradox typical of the quantum world, JILA scientists have eliminated collisions between atoms in an atomic clock by packing the atoms...

New Time Widget Puts Accurate Clocks on Web Pages

January 5, 2011

For Web site owners and bloggers, there is a new widget from the National Institute of Standards and Technology (NIST) that will keep your Web pages right on...

NIST Mini-Sensor Traces Faint Magnetic Signature of Human Heartbeat

October 13, 2010

Researchers from the National Institute of Standards and Technology (NIST) and the German national metrology institute have used NIST's miniature atom-based...

NIST Clock Experiment Demonstrates That Your Head is Older Than Your Feet

September 28, 2010

Scientists have long known that time passes faster at higher elevations—a curious aspect of Einstein's theories of relativity that previously has been measured...

NIST Pair of Aluminum Atomic Clocks Reveal Einstein's Relativity at a Personal Scale

September 23, 2010

BOULDER, Colo. – Scientists have known for decades that time passes faster at higher elevations—a curious aspect of Einstein's theories of relativity that...

Novel Ion Trap with Optical Fiber Could Link Atoms and Light in Quantum Networks

July 6, 2010

Physicists at the National Institute of Standards and Technology (NIST) have demonstrated an ion trap with a built-in optical fiber that collects light emitted...

Globe showing the 16 member countries of the Sistema Interamericano de Metrologia (SIM) Time Network

Time Is Money: SIM Time Network Has Far-Reaching Benefits

May 25, 2010

Clocks in the Americas and the Caribbean Islands are now ticking in unison thanks to the work of the Sistema Interamericano de Metrologia (SIM), a regional...

Good Times! Get to Know Your Radio-Controlled Clock

March 30, 2010

"How accurate is a radio-controlled clock?" National Institute of Standards and Technology (NIST) researcher Michael Lombardi asks and answers the question in a...

NIST's Second 'Quantum Logic Clock' is Now World's Most Precise Clock

February 16, 2010

Physicists at the National Institute of Standards and Technology (NIST) have built an enhanced version of an experimental atomic clock based on a single...

An ion trap sitting next to a quarter to show their similar size

NIST's Second 'Quantum Logic Clock' Based on Aluminum Ion is Now World's Most Precise Clock

February 4, 2010

BOULDER, Colo.—Physicists at the National Institute of Standards and Technology (NIST) have built an enhanced version of an experimental atomic clock based on a...

NIST, CU to Build Instrument to Help Search for Earth-like Planets

November 3, 2009

The National Institute of Standards and Technology (NIST) will collaborate with the University of Colorado at Boulder (CU) to build and apply a custom laser...

NIST Updates Popular Guide to Radio-Controlled Clocks

September 22, 2009

The National Institute of Standards and Technology (NIST) has updated its popular guide to radio-controlled clocks. Many millions of radio-controlled clocks...

black background with a bluish-purple circle of light in the middle

Ytterbium Gains Ground in Quest for Next-Generation Atomic Clocks

August 11, 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...

NIST Physicists Win European and Optics Society Awards

May 5, 2009

Jun Ye, a NIST Fellow working at JILA, a joint institute of NIST and the University of Colorado at Boulder, has received the 2009 European Frequency and Time...

NIST Physicist James Bergquist Elected to National Academy of Sciences

May 5, 2009

Physicist James C. Bergquist, a Fellow at the National Institute of Standards and Technology (NIST) whose research helped usher in the age of optical atomic...

Photo of NIST physicist Jun Ye with his strontium atomic clock

JILA/NIST Scientists Get a Grip on Colliding Fermions to Enhance Atomic Clock Accuracy

April 16, 2009

BOULDER, Colo.—Physicists have measured and controlled seemingly forbidden collisions between neutral strontium atoms—a class of antisocial atoms known as...

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