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quantum computers News
Universal digital simulator holds promise for quantum computers
INNSBRUCK, Austria – A new digital approach enables universal quantum simulation in a system of trapped ions that can in principle simulate any physical system efficiently, allowing researchers to explore the dynamics of quantum computers. Previously, quantum simulation was achieved through an analog method: Two years ago, the research group of Christian Roos and Rainer Blatt at the University of Innsbruck re-created the properties of a particle moving close to the speed of light in a quantum system. They...
Topological Properties Protect Quantum Memory, Computing
INNSBRUCK, Austria, Oct. 12, 2011 — Theoretical physicists have formulated a new concept for engineering so-called topological states of matter in quantum mechanical many-body systems. They linked concepts of quantum optics and condensed matter physics that eventually could lead to a...
Accurate Reading Taken from Mini-Quantum Computer
UTRECHT, Netherlands, Oct. 4, 2011 — Scientists have taken an accurate readout from a mini-quantum computer comprising four quantum bits on a chip of diamond. The advance marks a step toward quantum computing and makes it possible to test quantum algorithms, such as teleportation, on a...
$13M UMich Center to Advance Nanophotonics
ANN ARBOR, Mich., Sept. 15, 2011 — A new $13 million National Science Foundation center based at the University of Michigan will enable the development of high-tech photonic materials that could promote advances in invisibility cloaking, nanoscale lasers, high-efficiency lighting and...
Universal Digital Quantum Simulation Realized
INNSBRUCK, Austria, Sept. 2, 2011 — Using a digital approach instead of the previous analog approach, physicists have successfully achieved universal quantum simulation in a system of trapped ions that can, in principle, simulate any physical system efficiently. The mathematical...
Two Atoms Entangled Using Microwaves
BOULDER, Colo., Aug. 15, 2011 — For the first time NIST physicists have linked the quantum properties of two separated ions by manipulating them with microwaves instead of the usual array of laser beams. The development could pave the way for miniaturized, easy-to-commercialize...
First Micropillars Milled in Warsaw
WARSAW, Poland, June 20, 2011 — Rare milling equipment that produces nanosize semiconductor structures, or micropillars, is now at the disposal of scientists and students at the University of Warsaw. These micropillars can be used as efficient light sources and will open up...
Single Atom Stores Quantum Info
GARCHING, Germany, May 9, 2011 — Quantum information has been stored in a single rubidium atom, a technique that can be used in principle to design powerful quantum computers and to network them with each other across large distances. Quantum computers will one day be able to...
A game of quantum hot potato
BOULDER, Colo. – To simplify information processing for quantum computers and simulations, scientists have coaxed two atoms in separate locations to take turns jiggling back and forth while swapping the smallest measurable units of energy. For the first time,...
MMIs targeted for quantum computers
BRISTOL, UK – Quantum circuits based on optical multimode interference (MMI) are being used to advance quantum computers. Building a quantum computer requires a large number of interconnected components, or gates, whose function is similar to that of a...
It’s high “NOON” for microwave photons
SANTA BARBARA, Calif. – An important milestone toward the realization of a large-scale quantum computer and further demonstration of a new level of the quantum control of light were accomplished by a team of scientists at the University of California, Santa Barbara (UCSB),...
Photons for quantum computing
GAITHERSBURG, Md. – A reliable source of photons for quantum computers could be a step closer to realization, thanks to scientists at the National Institute of Standards and Technology (NIST) who have found that calculations impossible or impractical to achieve with...
Efficient Single-Photon Sources Move Closer
BRISTOL, England, March 29, 2011 — Fluorescent diamond “defect centers” are being used to create efficient single-photon sources that are expected to enable secure optical communications, also known as quantum cryptography. Defect centers in diamond materials, which...
Circuit Sets Record Beating Microscopic Drum
BOULDER, Colo., March 21, 2011 — An electrochemical circuit in which microwaves communicate with a vibrating mechanical component 1000 times more vigorously than has previously been demonstrated could one day control the motion of large objects at the quantum scale. ...
Switcher Takes Quantum Communication to New Level
EVANSTON, Ill., March 14, 2011 — The first all-optical switch suitable for single-photon quantum communications has been developed at Northwestern University. The switching device raises quantum communication to a new level, representing a step toward building a network that takes...
MMIs Targeted for Quantum Computers
BRISTOL, England, March 4, 2011 — Quantum circuits based on optical multimode interference (MMI) are being used to advance quantum computers. Building a quantum computer will require a large number of interconnected components (gates), whose function is similar to that of a...
NIST Advances Single Photon for Quantum Computers
GAITHERSBURG, Md., Jan. 21, 2011 — Researchers working at the National Institute of Standards and Technology (NIST) have brought science closer to creating reliable sources of photons for the long-awaited quantum computer. In principle, quantum computers can perform calculations that...
Laser Controls Quantum State in Diamond
SANTA BARBARA, Calif., Nov. 2, 2010 — Laser light has successfully been combined with trapped electrons to detect and control the electrons' fragile quantum state without erasing it. This is an important step toward using quantum physics to expand computing power and to communicate over...
Quantum Optical Chip Ramps Up Computing
BRISTOL, England, Sept. 16, 2010 — A new approach to computing that uses a quantum optical chip could soon be used to perform complex calculations that cannot be done by today’s computers, according to an international research group led by scientists from the University of...
Quantum Particles in Perfect Order
GARCHING, Germany, Aug. 20, 2010 — For the first time a team around Stefan Kuhr and Immanuel Bloch at Max Planck Institute of Quantum (MPQ) has now succeeded in observing — atom by atom, lattice site by lattice site — single-atom resolved images of a highly correlated...
Atom-Photon Pairs Key to Quantum Computers
MUNICH, Germany, Aug. 19, 2010 — In the quest for developing quantum computers that will be vastly superior to present-day computers, physicists have found that strong coupling of quantum bits with light quanta play a pivotal role. An electron microscopical picture of the...
Holding onto a Pinch of Light
TEL AVIV, Israel, July 16, 2010 — A new tool developed by Tel Aviv University, Holographic Optical Tweezers (HOTs) use holographic technology to manipulate up to 300 nanoparticles at a time, such as beads of glass or polymer, that are too small and delicate to be handled with...
Electron Superposition Controlled in Silicon
LONDON, June 23, 2010 — The remarkable ability of an electron to exist in two places at once has been controlled in the most common electronic material — silicon — for the first time. The research from the University of Surrey, University College London,...
Glass Fiber Interface Stores Quantum Info
MAINZ, Germany, May 25, 2010 — A quantum interface based on an ultrathin glass fiber, which connects light particles and atoms, has been realized by physicists at the Johannes Gutenberg University of Mainz. According to the team, this is an essential prerequisite for quantum...
Better Rydberg Atom Trap Built
ANN ARBOR, Mich., May 11, 2010 — In an achievement that could help enable fast quantum computers, University of Michigan physicists have built a better Rydberg atom trap. Rydberg atoms are highly excited, nearly-ionized giants that can be thousands of times larger than their...
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June 2024
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