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quantum computers News
Photon-Powered PCs Proposed
COPENHAGEN, Denmark, Aug. 27, 2007 -- A new theory uses nonlinear optics to create the photon transistors necessary to drive future quantum computers. Incredibly fast supercomputers that can solve extremely complicated tasks have long been a dream for researchers, but there are some serious obstacles to achieving that goal. One of them is the transistors, which are the systems that process the signals. Today the signal used is an electric current, but a quantum computer uses an optical signal. Today we can send information via...
Atoms Swap ‘Spins’
GAITHERSBURG, Md., July 30, 2007 -- In a quantum square dance, thousands of atoms trapped by laser beams have been induced to swap “spins” with partners simultaneously. The repeated exchanges, lasting a total of just 10 milliseconds, might someday carry out logic operations in...
'Spin Transport' Controlled in Silicon
NEWARK, Del., May 21, 2007 -- The magnet-like spin properties of electrons have been measured and controlled in silicon for the first time, research that could lead to dramatically improved computers and cell phones. The discovery advances the nascent field of spintronics,...
Single-Photon Server Created From an Atom
GARCHING, Germany, March 19, 2007 -- Physicists have succeeded in turning a rubidium atom into a single-photon server, which could allow scientists to generate high-quality photons with consistent energy levels for use in quantum computing. Finding photons is easy: Every time you...
Mechanical Motion 'Spins' Atoms in a Gas
GAITHERSBURG, Md., Dec. 11, 2006 -- For the first time, scientists have used mechanical motion to make atoms in a gas "spin." The technique eventually might be used in high-performance magnetic sensors, to enable power-efficient chip-scale atomic devices such as clocks, or serve as...
Physicists Get a Grip on a Single Electron's Spin
DELFT, Netherlands, Aug. 28, 2006 -- For the first time, researchers said they have succeeded in controlling the spin of a single electron in a nanostructure. The achievement is a step toward using the electron's spin as a quantum bit, the basis for constructing a still-theoretical...
Quantum Dots Suitable for Computing
Oct 1, 2003 — Quantum computers promise to enable immense computing power in systems based on units of information called qubits, which are similar to the binary bits in today's classical computers but which also can simultaneously represent both a 0 and a 1....
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