LinkNotes: quantum computing

Showing posts with label quantum computing. Show all posts

2009-11-23

First Universal Programmable Quantum Computer

Scientists Test First Universal Programmable Quantum Computer

Physicists have been taking baby steps toward creating a full-fledged quantum computer faster and more powerful than any computer in existence, by making quantum processors capable of performing individual tasks. Now a group at the National Institute of Standards and Technology (NIST) has developed the world's first universal programmable quantum computer that can run any program that's possible under the rules of quantum mechanics.

clipped from www.zmescience.com

First Universal Two-Qubit quantum processor created

This processor could prove to be a major breakthrough for a future quantum computer, that could very well be the ‘evolutionary leap’ in the computers’ life thus resulting the possible solve of problems that are untouchable today. The discovery was presented in the latest edition of Nature Physics and this marks the first time anybody has moved beyond asking a single task from a quantum computer.

clipped from www.nature.com

Realization of a programmable two-qubit quantum processor

D. Hanneke, J. P. Home, J. D. Jost, J. M. Amini, D. Leibfried, D. J. Wineland

clipped from www.nist.gov

clipped from tf.nist.gov

Ion Storage Group

clipped from david.hanneke.us

David Hanneke
Quantum Mechanic

clipped from www.nist.gov

NIST postdoctoral researcher David Hanneke at the laser table used to demonstrate the first universal programmable processor for a potential quantum computer. A pair of beryllium ions (charged atoms) that hold information in the processor are trapped inside the cylinder at the lower right. A colorized image of the two ions is displayed on the monitor in the background.

“This is the first time anyone has demonstrated a programmable quantum processor for more than one qubit,” says NIST postdoctoral researcher David Hanneke, first author of the paper. “It’s a step toward the big goal of doing calculations with lots and lots of qubits. The idea is you’d have lots of these processors, and you’d link them together.

The NIST processor stores binary information (1s and 0s) in two beryllium ions (electrically charged atoms), which are held in an electromagnetic trap and manipulated with ultraviolet lasers. Two magnesium ions in the trap help cool the beryllium ions.

NIST scientists can manipulate the states of each beryllium qubit, including placing the ions in a “superposition” of both 1 and 0 values at the same time, a significant potential advantage of information processing in the quantum world. Scientists also can “entangle” the two qubits, a quantum phenomenon that links the pair’s properties even when the ions are physically separated.

Sources:

Long-Distance Teleportation Achieved

Clipped from: FOXNews.com - Scientist Teleport Matter More Than Three Feet - Science News | Science & Technology | Technology News

Scientist Teleport Matter More Than Three Feet

Scientists have come a bit closer to achieving the "Star Trek" feat of teleportation.

No one is galaxy-hopping, or even beaming people around, but for the first time, information has been teleported between two separate atoms across a distance of a meter — about a yard.

Clipped from: Quantum Teleportation Is a Go! | 80beats | Discover Magazine

Quantum Teleportation Is a Go!

Researchers have accomplished teleportation, though not of the “Beam me up, Scotty” variety. Instead, they sent information between two individual atoms of the element ytterbium, which were suspended in separate containers three feet apart. Because the quantum information instantly hops from one atom to the other without ever crossing the space between the two, scientists call the transfer “teleportation” [Science News].

Over the years, teleportation experiments have demonstrated that quantum states - for example, the spin of a particle or the polarization of a photon - can be teleported using a variety of methods. But the researchers behind the latest experiment … claim that this is the first time information has been teleported between two separate atoms in unconnected enclosures [MSNBC].

Clipped from: Long-Distance Teleportation Between Two Atoms Achieved :: University Communications Newsdesk, University of Maryland

Long-Distance Teleportation Between Two Atoms Achieved

Clipped from: University of Maryland Trapped Ion Quantum Computing Group

Prof. Christopher Monroe's research group at the University of Maryland Department of Physics and Joint Quantum Institute

[...] focuses on the electromagnetic manipulation of individual atoms
and photons for fundamental studies of quantum mechanics and applications in quantum information science.

Quantum Teleportation Is a Go! | 80beats | Discover Magazine

University of Maryland Trapped Ion Quantum Computing Group

Long-Distance Teleportation Between Two Atoms Achieved :: University Communications Newsdesk, University of Maryland

Quantum Leap: Information Teleported between Ions at a Distance: Scientific American

Technology Review: A Quantum Memory Leap

One quantum leap - Cosmic Log - msnbc.com

Teleportation Milestone Achieved | LiveScience

Quantum T Quantum Technologies Move A Step Closer With Demonstration Of An 'Entanglement' Filter eleportation Between Distant Matter Qubits: First Between Atoms 1 Meter Apart

Quantum Teleportation Between Distant Matter Qubits -- Olmschenk et al. 323 (5913): 486 -- Science

2008-04-22

Chips for optical quantum computing

Physicists at Bristol University in the United Kingdom have demonstrated the first logic gates on a silicon chip that can process individual photons. This brings quantum computing, based upon manipulating single photons a step closer to reality.

clipped from arstechnica.com

Integrated optics: the way to scale a quantum computer

One of the problems inherent in every implementation of quantum computing has been scaling. To gain a significant speed-up, we need a system that has enough qubits to represent the solution, but this has, so far, proven to be impossible to do in a way that accomplishes any useful work. Now, new research from Bristol University has described a method of creating optical quantum gates that can scale to many qubits reasonably well.

clipped from www.phy.bris.ac.uk

Centre for Quantum Photonics

clipped from www.informationweek.com

Physicists Build First Single-Photon Logic Gate

Bristol University physicists advance the field of quantum computing with the successful miniaturization of a high-performance, optical "controlled-NOT gate."

Led by professor Jeremy O'Brien, the researchers have successfully miniaturized a high-performance, optical "controlled-NOT gate" -- a type of logic gate considered "the building block of a quantum computer," according to a press release from Bristol.