Showing posts with label teraflop. Show all posts
Showing posts with label teraflop. Show all posts

Jun 21, 2013

Quantum Computing Explained

Today's computers rely on electrons to deliver information in binary bits, or yes/no, 1/0, on/off.

Laws of quantum physics allow bits to be in multiple states simultaneously so it has the potential to be millions of times more powerful than today's most powerful supercomputers.

Quantum bits, or Qubits are more versatile than standard bits because they can exist in three states instead of two. Current computers represent things as a one or zero, but a quantum computer can render a qubit as representing a one, a zero, or every fraction between one and zero at the same time.

An interesting thing about qubits is that by just looking at one, it changes its state, so scientists had to devise a way to look without the qubit knowing it was being looked at. (Long story, but fascinating)

A 30-qubit quantum computer is approximately as powerful as a 10 teraflop computer. It can solve 10 trillion floating point operations every second vs. an average computer, which performs about seven gigaflops (seven billion) per second. Quantum computers process multiple calculations at once vs. current computers, which process one at a time.

Google and NASA have a 512-qubit quantum computer housed in a 10 foot black cabinet, but do not expect to buy one for your home in the near future. The NASA Ames machine may be upgraded to a 2,048 qubit chip in the next year or two. There are 25.4 million nanometers in one inch and fingernails grow one nanometer every second.

Feb 25, 2011

Worlds Fastest Computer

The fastest computer in the world belongs to the Chinese. The Tianjin National Supercomputer Center's Tianhe-1A system benchmarked a performance of 2.67 petaflops (A petaflop is 1,125,899,906,842,624 calculations per second - a thousand trillion or quadrillion), surpassing the U.S. Department of Energy's Cray XT5 Jaguar system at a slow 1.75 petaflops. IBM is building two mega machines, a 10 petaflops and a 20 petaflops system, both to be running in 2012. We are approaching the Singularity faster than predicted.

A human brain's probable processing power is around 100 teraflops (100 trillion calculations per second), according to Hans Morvec, principal research scientist at the Robotics Institute of Carnegie Mellon University. We do have one edge over computers, they have not been able to build a computer that fast as small as our brain. . .  yet.

Less than forty years ago, we were wondering when the computer would be able to do a million operations a second. Less than three years ago we hailed the fastest computer for running teraflops (trillion floating point operations per second).

BTW, IBM's Watson, of Jeopardy fame, runs at a miserably slow speed of 80 teraflops.