Vacuum Einstein Equation
Updated: 2012-10-31 15:59:55
Sorry if I am asking a too trivial question! I am having a confusion regarding the following-The solution to Einstein equation in vacuum is given by the Schwarzschild metric. However, what does the...

I’m very sad to report that Wallace Sargent, a distinguished astronomer at Caltech, died yesterday. Wal, as he was known, was a world leader in spectroscopy and extragalactic astronomy, with a specialty in studies of quasar absorption lines. He played a crucial role in numerous major projects in astronomy, including serving as the director of [...]
On July 4, scientists around the world popped open champagne bottles and toasted the culmination of nearly five decades of research. They had discovered a new particle, one that looked awfully similar to the long-sought Higgs boson.
The Higgs boson has for decades been the last missing piece of the Standard Model of particle physics. But even if the new particle completes the puzzle, some of its pieces still refuse to fit.
A treasure trove of dark-matter detectors rests within the deep reaches of Italy's Apennine Mountains as part of Gran Sasso National Laboratory. The mountains shield the detectors from cosmic rays, making them highly sensitive to dark-matter particles.
In Wim Leemans’ lab at Lawrence Berkeley National Laboratory sits one of the world’s most advanced R&D accelerators. By pushing electrons forward on the crest of plasma waves, the accelerator is capable of accelerating electron bunches from an energy of 0 to 1 billion electronvolts in just 3 centimeters. But, until now, Leemans and his team were unable to quantify exactly how uniform that acceleration was within a bunch of electrons. This measurement is especially important for one of the most promising applications of plasma accelerators: free-electron lasers.
Seeking less costly, more efficient means of particle acceleration, physicists are developing new types of machines that zip particles to high energies in short distances. One promising method harnesses the power of plasma, accelerating electron bunches on the crest of plasma waves. Physicists recently discovered a way to measure the focus of such a beam, despite the fact that the plasma would melt traditional diagnostic tools.
SLAC has a new director: X-ray scientist Chi-Chang Kao. Kao currently serves as Associate Laboratory Director for SLAC's Stanford Synchrotron Radiation Lightsource and Acting Associate Laboratory Director for the lab's Photon Science directorate. He will assume the directorship on November 1.
Gravitational waves were first predicted by Albert Einstein almost a century ago, but scientists have yet to observe them directly.
Quantum Diaries Thoughts on work and life from particle physicists from around the . world Home About Quantum Diaries Latest Posts All Blogs John Felde UC Davis USA View Blog Read Bio Latest Posts 2012.03.05 Fast Photosensors for Neutrino Physics 2011.11.22 Recent Events at UC Davis 2011.11.09 First Double Chooz Neutrino Oscillation Result USLHC USLHC USA View Blog Read Bio Latest Posts 2012.10.16 For the Higgs , No Theological Assistance Required 2012.10.13 Snowmass” Not Snowmass 2012.10.05 VERTEX 2012 Frank Simon MPI for Physics Germany View Blog Read Bio Latest Posts 2012.07.04 Plus Two 2011.12.14 After the talk is before the talk 2011.10.24 Breathe Flip Tanedo USLHC USA View Blog Read Bio Latest Posts 2012.07.19 The Post-Higgs Hangover : where’s the new physics 2012.07.06 More
Quantum Diaries Thoughts on work and life from particle physicists from around the . world Home About Quantum Diaries Latest Posts All Blogs John Felde UC Davis USA View Blog Read Bio Latest Posts 2012.03.05 Fast Photosensors for Neutrino Physics 2011.11.22 Recent Events at UC Davis 2011.11.09 First Double Chooz Neutrino Oscillation Result USLHC USLHC USA View Blog Read Bio Latest Posts 2012.10.16 For the Higgs , No Theological Assistance Required 2012.10.13 Snowmass” Not Snowmass 2012.10.05 VERTEX 2012 Frank Simon MPI for Physics Germany View Blog Read Bio Latest Posts 2012.07.04 Plus Two 2011.12.14 After the talk is before the talk 2011.10.24 Breathe Flip Tanedo USLHC USA View Blog Read Bio Latest Posts 2012.07.19 The Post-Higgs Hangover : where’s the new physics 2012.07.06 More
Scientists from the groups of professors Risa Wechsler and Tom Abel at the Kavli Institute for Particle Astrophysics and Cosmology, an institute run jointly by Stanford University and SLAC National Accelerator Laboratory, are busily crafting enough computer simulation tools to outfit a major stadium tour—if simulations were musical instruments and the KIPAC scientists a supergroup. They’ve managed to meld their different strains of software into the type of melody that dark matter just might dance to.
CERN and Angry Birds-creator Rovio announced last Friday that they will team up to produce a learning program for children between 3 and 8 years old.
The partnership will focus on the Angry Birds Playground brand, which is designed to make learning about physics fun and accessible for all ages. It is based on Finland’s national kindergarten curriculum.
Anyone in the world with a computer can contribute to research at CERN. Through the LHC@Home project, volunteers can offer up spare computing power to simulate and process collisions happening inside the Large Hadron Collider.
CERN recently improved the program with a new feature that helps scientists monitor the system that distributes work among volunteers’ computers. But the new feature is not the work of a CERN employee; it is the work of a college undergraduate who had the chance to work with CERN through the 2012 Google Summer of Code.
Quantum Diaries Thoughts on work and life from particle physicists from around the . world Home About Quantum Diaries Latest Posts All Blogs John Felde UC Davis USA View Blog Read Bio Latest Posts 2012.03.05 Fast Photosensors for Neutrino Physics 2011.11.22 Recent Events at UC Davis 2011.11.09 First Double Chooz Neutrino Oscillation Result USLHC USLHC USA View Blog Read Bio Latest Posts 2012.10.05 VERTEX 2012 2012.10.01 Happy Birthday ATLAS 2012.09.17 So long , and thanks for all the fish Frank Simon MPI for Physics Germany View Blog Read Bio Latest Posts 2012.07.04 Plus Two 2011.12.14 After the talk is before the talk 2011.10.24 Breathe Flip Tanedo USLHC USA View Blog Read Bio Latest Posts 2012.07.19 The Post-Higgs Hangover : where’s the new physics 2012.07.06 More Post-Higgs silliness
Every year, particle accelerators play an essential role in scientific discovery, industry and even medicine. But what does it take to make an accelerator run? This video, produced by SLAC National Accelerator Laboratory, takes you into the department that builds klystrons, the devices that propel particles to nearly the speed of light within SLAC’s accelerators.
Particle detectors are the eyes of physicists, peering closely into particle events to help us understand the basic laws of nature.
To develop the kind of sight needed to view the complex particle events of future experiments, researchers are transforming detection technology by developing new, intelligent detectors. They are pushing past the limits of two-dimensional chips, the current technology, by adding to them another dimension. The three-dimensional integrated chip, or 3DIC, will be key for future detectors.
This type of detector may have a futuristic name, but it already has a spot in the history of particle physics.
Ryan Campbell, an ecologist with Fermilab’s Roads and Grounds Group, leans back in his office chair on a hot, humid Illinois summer morning. His gaze fixes on a large aerial photograph of the Fermilab property, on which he’d placed nametags on some of the large swaths of green fields and forests.
The Royal Swedish Academy of Sciences has awarded the 2012 Nobel Prize in physics to two scientists who developed groundbreaking experimental methods that are the first steps toward building a new type of supercomputer known as a quantum computer. Their research has also led to the construction of extremely precise clocks that may replace present-day atomic clocks.
If you’ve ever spent much time around astronomers, you’ll know that they tend to like their theme wear — space ties, galaxy t-shirts, satellite lapel pins, etc. To this list, I am thrilled beyond measure to add space clogs. Yes, space clogs. Dansko has come out with a limited edition “Stargazer” version of their standard [...]
...Still a little disturbed by this. More later, I promise.
-cvj
Quantum Diaries Thoughts on work and life from particle physicists from around the . world Home About Quantum Diaries Latest Posts All Blogs John Felde UC Davis USA View Blog Read Bio Latest Posts 2012.03.05 Fast Photosensors for Neutrino Physics 2011.11.22 Recent Events at UC Davis 2011.11.09 First Double Chooz Neutrino Oscillation Result USLHC USLHC USA View Blog Read Bio Latest Posts 2012.10.01 Happy Birthday ATLAS 2012.09.17 So long , and thanks for all the fish 2012.09.15 I don’t really like flying , but Frank Simon MPI for Physics Germany View Blog Read Bio Latest Posts 2012.07.04 Plus Two 2011.12.14 After the talk is before the talk 2011.10.24 Breathe Flip Tanedo USLHC USA View Blog Read Bio Latest Posts 2012.07.19 The Post-Higgs Hangover : where’s the new physics 2012.07.06 More
Quantum Diaries Thoughts on work and life from particle physicists from around the . world Home About Quantum Diaries Latest Posts All Blogs John Felde UC Davis USA View Blog Read Bio Latest Posts 2012.03.05 Fast Photosensors for Neutrino Physics 2011.11.22 Recent Events at UC Davis 2011.11.09 First Double Chooz Neutrino Oscillation Result USLHC USLHC USA View Blog Read Bio Latest Posts 2012.10.01 Happy Birthday ATLAS 2012.09.17 So long , and thanks for all the fish 2012.09.15 I don’t really like flying , but Frank Simon MPI for Physics Germany View Blog Read Bio Latest Posts 2012.07.04 Plus Two 2011.12.14 After the talk is before the talk 2011.10.24 Breathe Flip Tanedo USLHC USA View Blog Read Bio Latest Posts 2012.07.19 The Post-Higgs Hangover : where’s the new physics 2012.07.06 More
Quantum Diaries Thoughts on work and life from particle physicists from around the . world Home About Quantum Diaries Latest Posts All Blogs John Felde UC Davis USA View Blog Read Bio Latest Posts 2012.03.05 Fast Photosensors for Neutrino Physics 2011.11.22 Recent Events at UC Davis 2011.11.09 First Double Chooz Neutrino Oscillation Result USLHC USLHC USA View Blog Read Bio Latest Posts 2012.10.01 Happy Birthday ATLAS 2012.09.17 So long , and thanks for all the fish 2012.09.15 I don’t really like flying , but Frank Simon MPI for Physics Germany View Blog Read Bio Latest Posts 2012.07.04 Plus Two 2011.12.14 After the talk is before the talk 2011.10.24 Breathe Flip Tanedo USLHC USA View Blog Read Bio Latest Posts 2012.07.19 The Post-Higgs Hangover : where’s the new physics 2012.07.06 More
Quantum Diaries Thoughts on work and life from particle physicists from around the . world Home About Quantum Diaries Latest Posts All Blogs John Felde UC Davis USA View Blog Read Bio Latest Posts 2012.03.05 Fast Photosensors for Neutrino Physics 2011.11.22 Recent Events at UC Davis 2011.11.09 First Double Chooz Neutrino Oscillation Result USLHC USLHC USA View Blog Read Bio Latest Posts 2012.09.17 So long , and thanks for all the fish 2012.09.15 I don’t really like flying , but 2012.09.07 Why particle detectors need a trigger Frank Simon MPI for Physics Germany View Blog Read Bio Latest Posts 2012.07.04 Plus Two 2011.12.14 After the talk is before the talk 2011.10.24 Breathe Flip Tanedo USLHC USA View Blog Read Bio Latest Posts 2012.07.19 The Post-Higgs Hangover : where’s the new physics
Quantum Diaries Thoughts on work and life from particle physicists from around the . world Home About Quantum Diaries Latest Posts All Blogs John Felde UC Davis USA View Blog Read Bio Latest Posts 2012.03.05 Fast Photosensors for Neutrino Physics 2011.11.22 Recent Events at UC Davis 2011.11.09 First Double Chooz Neutrino Oscillation Result USLHC USLHC USA View Blog Read Bio Latest Posts 2012.09.17 So long , and thanks for all the fish 2012.09.15 I don’t really like flying , but 2012.09.07 Why particle detectors need a trigger Frank Simon MPI for Physics Germany View Blog Read Bio Latest Posts 2012.07.04 Plus Two 2011.12.14 After the talk is before the talk 2011.10.24 Breathe Flip Tanedo USLHC USA View Blog Read Bio Latest Posts 2012.07.19 The Post-Higgs Hangover : where’s the new physics
Quantum Diaries Thoughts on work and life from particle physicists from around the . world Home About Quantum Diaries Latest Posts All Blogs John Felde UC Davis USA View Blog Read Bio Latest Posts 2012.03.05 Fast Photosensors for Neutrino Physics 2011.11.22 Recent Events at UC Davis 2011.11.09 First Double Chooz Neutrino Oscillation Result USLHC USLHC USA View Blog Read Bio Latest Posts 2012.09.15 I don’t really like flying , but 2012.09.07 Why particle detectors need a trigger 2012.09.06 BOOST Part 2 : Jet Mass Frank Simon MPI for Physics Germany View Blog Read Bio Latest Posts 2012.07.04 Plus Two 2011.12.14 After the talk is before the talk 2011.10.24 Breathe Flip Tanedo USLHC USA View Blog Read Bio Latest Posts 2012.07.19 The Post-Higgs Hangover : where’s the new physics 2012.07.06 More
Quantum Diaries Thoughts on work and life from particle physicists from around the . world Home About Quantum Diaries Latest Posts All Blogs John Felde UC Davis USA View Blog Read Bio Latest Posts 2012.03.05 Fast Photosensors for Neutrino Physics 2011.11.22 Recent Events at UC Davis 2011.11.09 First Double Chooz Neutrino Oscillation Result USLHC USLHC USA View Blog Read Bio Latest Posts 2012.09.15 I don’t really like flying , but 2012.09.07 Why particle detectors need a trigger 2012.09.06 BOOST Part 2 : Jet Mass Frank Simon MPI for Physics Germany View Blog Read Bio Latest Posts 2012.07.04 Plus Two 2011.12.14 After the talk is before the talk 2011.10.24 Breathe Flip Tanedo USLHC USA View Blog Read Bio Latest Posts 2012.07.19 The Post-Higgs Hangover : where’s the new physics 2012.07.06 More
Quantum Diaries Thoughts on work and life from particle physicists from around the . world Home About Quantum Diaries Latest Posts All Blogs John Felde UC Davis USA View Blog Read Bio Latest Posts 2012.03.05 Fast Photosensors for Neutrino Physics 2011.11.22 Recent Events at UC Davis 2011.11.09 First Double Chooz Neutrino Oscillation Result USLHC USLHC USA View Blog Read Bio Latest Posts 2012.09.15 I don’t really like flying , but 2012.09.07 Why particle detectors need a trigger 2012.09.06 BOOST Part 2 : Jet Mass Frank Simon MPI for Physics Germany View Blog Read Bio Latest Posts 2012.07.04 Plus Two 2011.12.14 After the talk is before the talk 2011.10.24 Breathe Flip Tanedo USLHC USA View Blog Read Bio Latest Posts 2012.07.19 The Post-Higgs Hangover : where’s the new physics 2012.07.06 More
Quantum Diaries Thoughts on work and life from particle physicists from around the . world Home About Quantum Diaries Latest Posts All Blogs John Felde UC Davis USA View Blog Read Bio Latest Posts 2012.03.05 Fast Photosensors for Neutrino Physics 2011.11.22 Recent Events at UC Davis 2011.11.09 First Double Chooz Neutrino Oscillation Result USLHC USLHC USA View Blog Read Bio Latest Posts 2012.09.15 I don’t really like flying , but 2012.09.07 Why particle detectors need a trigger 2012.09.06 BOOST Part 2 : Jet Mass Frank Simon MPI for Physics Germany View Blog Read Bio Latest Posts 2012.07.04 Plus Two 2011.12.14 After the talk is before the talk 2011.10.24 Breathe Flip Tanedo USLHC USA View Blog Read Bio Latest Posts 2012.07.19 The Post-Higgs Hangover : where’s the new physics 2012.07.06 More
Click to enlarge. Trust me- you want to do this! Before the newsy stuff I had to give you that eye-g
The decay of a particle collision, from which the Higgs has been possibly observed. Th
After discovering the smallest particle that could ever exist, the team at Cern is now considering s
Quantum Diaries Thoughts on work and life from particle physicists from around the . world Home About Quantum Diaries Latest Posts All Blogs John Felde UC Davis USA View Blog Read Bio Latest Posts 2012.03.05 Fast Photosensors for Neutrino Physics 2011.11.22 Recent Events at UC Davis 2011.11.09 First Double Chooz Neutrino Oscillation Result USLHC USLHC USA View Blog Read Bio Latest Posts 2012.09.04 Biking to CERN 2012.09.01 The LHC sneaks along , part 2 2012.08.30 What Goes on My Research Page Frank Simon MPI for Physics Germany View Blog Read Bio Latest Posts 2012.07.04 Plus Two 2011.12.14 After the talk is before the talk 2011.10.24 Breathe Flip Tanedo USLHC USA View Blog Read Bio Latest Posts 2012.07.19 The Post-Higgs Hangover : where’s the new physics 2012.07.06 More Post-Higgs
Quantum Diaries Thoughts on work and life from particle physicists from around the . world Home About Quantum Diaries Latest Posts All Blogs John Felde UC Davis USA View Blog Read Bio Latest Posts 2012.03.05 Fast Photosensors for Neutrino Physics 2011.11.22 Recent Events at UC Davis 2011.11.09 First Double Chooz Neutrino Oscillation Result USLHC USLHC USA View Blog Read Bio Latest Posts 2012.09.04 Biking to CERN 2012.09.01 The LHC sneaks along , part 2 2012.08.30 What Goes on My Research Page Frank Simon MPI for Physics Germany View Blog Read Bio Latest Posts 2012.07.04 Plus Two 2011.12.14 After the talk is before the talk 2011.10.24 Breathe Flip Tanedo USLHC USA View Blog Read Bio Latest Posts 2012.07.19 The Post-Higgs Hangover : where’s the new physics 2012.07.06 More Post-Higgs