science top stories popular news  

Daily non-political popular news in brief.

Crueltyfree: Counting photons without killing them

08-25-2007 · Science News Online

A delicate quantum measurement counts photons without destroying them.

Read more »

Keywords: crueltyfree, counting, photons, killing, photon

« Previous | Next »

Similar news on "Crueltyfree: Counting photons without killing them":

  1. Faster X-ray interferometers due to single-photon interference
    12-18-2007 · EurekAlert!
    By means of X-ray interferometers, lengths down to the mm range can be measured with a resolution of less than one nm. The low translation velocity of the interferometers, which made their use in practice more difficult, could now be increased by a factor of 100 by exploiting the temporal correlation of singly interfering X-ray photons.
    Similar news · Read more »
  2. Tiny avalanche photodiode detects single UV photons
    01-28-2008 · EurekAlert!
    Researchers at Northwestern University's McCormick School of Engineering have demonstrated visible-blind avalanche photodiodes capable of detecting single photons in the ultraviolet region (360-200 nm). The Northwestern team, led by Manijeh Razeghi, Walter P. Murphy Professor of Electrical Engineering and Computer Science at Northwestern's McCormick School of Engineering, became the world's first to demonstrate back-illuminated single photon detection from a III-nitride photodetector.
    Similar news · Read more »
  3. Mass weddings -- NIST's new efficient 2-photon source
    04-12-2007 · EurekAlert!
    NIST physicists have developed a highly efficient, low-noise system for producing pairs of photons for applications in quantum information theory and telecommunications.
    Similar news · Read more »
  4. Seven-point system gauges seriousness of heart failure in elderly
    11-09-2006 · EurekAlert!
    A simple points system may soon help guide treatment of elderly heart failure patients. Researchers at Washington University School of Medicine in St. Louis found that by counting how many of seven easy-to-obtain health factors a patient has, physicians can estimate the patient's risk of dying.
    Similar news · Read more »
  5. Monkeys perform arithmetic as well as college students
    12-17-2007 · EurekAlert!
    Monkeys have an ability to represent numerical values even though they lack linguistic abilities. The authors show that monkeys can also perform addition on numerical values, and that they perform similarly to college students who are asked to add without counting.
    Similar news · Read more »
  6. When God sanctions killing, the people listen
    02-23-2007 · EurekAlert!
    New research sheds light on possible origins of violent religious fundamentalism.
    Similar news · Read more »
  7. White blood cells are picky about sugar
    07-11-2007 · EurekAlert!
    A unique sugar recognized by white blood cells stimulates robust engulfment and killing of fungi, and might be useful to fight microbial infections that are resistant to current treatments.
    Similar news · Read more »
  8. Gene may hold key to future cancer hope
    10-08-2007 · EurekAlert!
    Scientists may have discovered a new way of killing tumours in what they hope could one day lead to alternative forms of cancer treatments.
    Similar news · Read more »
  9. Seismic images show dinosaur-killing meteor made bigger splash
    01-23-2008 · EurekAlert!
    The most detailed 3-D seismic images yet of the Chicxulub impact crater may modify a theory explaining the "KT Extinction Event" that wiped out most life on Earth, including the dinosaurs. According to research appearing in Nature Geosciences, the asteroid landed in deeper water than previously assumed and therefore released about 6.5 times more water vapor into the atmosphere, possibly making it deadlier by altering climate and generating acid rain.
    Similar news · Read more »
  10. Professor Strauf's research is Nature Photonics’ cover article
    12-06-2007 · EurekAlert!
    Stefan Strauf, assistant professor in the department of physics and engineering physics at Stevens Institute of Technology, along with colleagues from the University of California, Santa Barbara and Leiden University, has authored the article, "High-frequency single-photon source with polarization control," the cover article of the December 2007 issue of Nature Photonics.
    Similar news · Read more »