Bizarre matter could find use in quantum computers: Odd electron mix has fault-tolerant quantum registry

From PhysOrg.com:

There are enticing new findings this week in the worldwide search for materials that support fault-tolerant quantum computing. New results from Rice University and Princeton University indicate that a bizarre state of matter that acts like a particle with one-quarter electron charge also has a "quantum registry" that is immune to information loss from external perturbations.

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Digging deep into diamonds, physicists advance quantum science and technology

From >PhysOrg.com:

By creating diamond-based nanowire devices, a team at Harvard has taken another step towards making applications based on quantum science and technology possible.

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Scientist make a leap in quantum computing

From PhysOrg.com:

A major hurdle in the ambitious quest to design and construct a radically new kind of quantum computer has been finding a way to manipulate the single electrons that very likely will constitute the new machines' processing components or "qubits."

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Scientists demonstrate 'universal' programmable quantum processor

From PhysOrg.com:

Physicists at the National Institute of Standards and Technology have demonstrated the first "universal" programmable quantum information processor able to run any program allowed by quantum mechanics -- the rules governing the submicroscopic world -- using two quantum bits (qubits) of information. The processor could be a module in a future quantum computer, which theoretically could solve some important problems that are intractable today.

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Solving big problems with new quantum algorithm

From PhysOrg.com:

In a recently published paper, Aram Harrow at the University of Bristol and colleagues from MIT in the United States have discovered a quantum algorithm that solves large problems much faster than conventional computers can.

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Weird "Particles" Spotted in Hot New Material

From Science NOW:

In the past 5 years, no material has excited more interest from condensed matter physicists than graphene, a sheet of carbon only one atom thick. Electrons zing through the stuff in an unusual way, and they flow so easily that graphene could someday replace silicon and other semiconductors as the material of choice for microchips. Now, a team of physicists has taken a key step in fulfilling graphene's promise as a hotbed of exotic physics by showing that the electrons within it can team up to behave like particles with a fraction of the electron's charge.

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Quantum computing may actually be useful, after all

From PhysOrg.com:

In recent years, quantum computers have lost some of their luster. In the 1990s, it seemed that they might be able to solve a class of difficult but common problems — the so-called NP-complete problems — exponentially faster than classical computers. Now, it seems that they probably can't. In fact, until this week, the only common calculation where quantum computation promised exponential gains was the factoring of large numbers, which isn't that useful outside cryptography.

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Proposed Quantum Computer Consists of Billions of Electron Spins

From PhysOrg.com:

While researchers have already demonstrated the building blocks for few-bit quantum computers, scaling these systems up to large quantum computers remains a challenge. One of the biggest problems is developing physical systems that can reliably store thousands of qubits, and enabling bits and pairs to be addressed individually for gate operations.

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First-ever calculation performed on optical quantum computer chip

From PhysOrg.com:

A primitive quantum computer that uses single particles of light (photons) whizzing through a silicon chip has performed its first mathematical calculation. This is the first time a calculation has been performed on a photonic chip and it is major step forward in the quest to realise a super-powerful quantum computer.

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Sustained quantum information processing demonstrated

From PhysOrg.com:

Raising prospects for building a practical quantum computer, physicists at the National Institute of Standards and Technology have demonstrated sustained, reliable information processing operations on electrically charged atoms (ions). The new work, described in the August 6 issue of Science Express, overcomes significant hurdles in scaling up ion-trapping technology from small demonstrations to larger quantum processors.

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Discovery about behavior of building block of nature could lead to computer revolution

From PhysOrg.com:

The electron is a fundamental building block of nature and is indivisible in isolation, yet a new experiment has shown that electrons, if crowded into narrow wires, are seen to split apart.

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Physicists Propose Scheme for Teleporting Light Beams

From PhyOrg.com:

Usually when physicists talk about quantum teleportation, they're referring to the transfer of quantum states from one particle to another without a physical link. Now, physicists have investigated a slightly different form of teleportation, in which they teleport a quantum field, or an entire beam of light, from one location to another. This kind of "strong" teleportation is required for some quantum information applications, and could lead to the teleportation of quantum images.

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Physicists find way to control individual bits in quantum computers

From PhysOrg.com:

Physicists at the National Institute of Standards and Technology have overcome a hurdle in quantum computer development, having devised a viable way to manipulate a single "bit" in a quantum processor without disturbing the information stored in its neighbors. The approach, which makes novel use of polarized light to create "effective" magnetic fields, could bring the long-sought computers a step closer to reality.

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Physicists Demonstrate Quantum Memory with Matter Qubits

From PhyOrg.com:

For the first time, scientists have successfully operated a quantum gate between two remote particles of matter, marking an important step toward the development of a quantum computer. In previous experiments, researchers have used photons, which are difficult to store. Using matter qubits enables the researchers to store the obtained quantum information, opening up new possibilities for the generation of remote networks of entangled qubits.

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Could Maxwell's Demon Exist in Nanoscale Systems?

From PhysOrg.com:

Maxwell’s demon may be making a comeback. Physicists know that the demon, an imaginary creature that decreases the entropy of a system, cannot exist in macroscopic systems due to the energy it requires to perform its role. However, a recent study has shown that, on the nanoscale, Maxwell’s demon might be able to do its work with much less energy than previously thought due to tiny thermal fluctuations that occur in small systems

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Making quantum computing scalable

From PhysOrg.com:

Quantum information processing is one of the hottest areas of science and technology right now. Making quantum information processing scalable is an important part of the efforts involved with regard to practical quantum computing. “By tuning the gap of a superconducting qubit, we can allow different types of coupling for use in quantum information processing,” Hans Mooij tells PhysOrg.com.

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Quantum technologies move a step closer with the demonstration of an 'entanglement' filter

(PhysOrg.com) -- A team of physicists and engineers has demonstrated an optical device that filters two particles of light (or photons) based on the correlations between their polarisation that are only allowed in the seemingly bizarre quantum world. This so called "entanglement filter" passes the pair of photons only if they inhabit the same quantum state, without the user (or anything else) ever knowing what that state is.

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How Time-Traveling Could Affect Quantum Computing

How Time-Traveling Could Affect Quantum Computing from PhysOrg.com

(PhysOrg.com) -- If space-time were constructed in such a way that you could travel back in time, it would create some pretty strange effects. One of these oddities, as many people know, is the “grandfather paradox.” Here, a person travels back in time to kill their grandfather before the person’s father is born, thus preventing their own birth.

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Memoirs of a qubit: Hybrid memory solves key problem for quantum computing

Memoirs of a qubit: Hybrid memory solves key problem for quantum computing from PhysOrg.com

An international team of scientists has performed the ultimate miniaturisation of computer memory: storing information inside the nucleus of an atom. This breakthrough is a key step in bringing to life a quantum computer - a device based on the fundamental theory of quantum mechanics which could crack problems unsolvable by current technology.

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Researchers make milestone discovery in quantum mechanics

Researchers make milestone discovery in quantum mechanics from PhysOrg.com

Researchers at UC Santa Barbara have recently reached what they are calling a milestone in experimental quantum mechanics.

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