Computer Science: General Computer Science: Quantum Computers Physics: Quantum Computing Physics: Quantum Physics
Published

New method to control electron spin paves the way for efficient quantum computers      (via sciencedaily.com) 

Researchers have developed a new method for manipulating information in quantum systems by controlling the spin of electrons in silicon quantum dots. The results provide a promising new mechanism for control of qubits, which could pave the way for the development of a practical, silicon-based quantum computer.

Computer Science: Quantum Computers Offbeat: Computers and Math Physics: Quantum Computing Physics: Quantum Physics
Published

Qubits on strong stimulants      (via sciencedaily.com)     Original source 

In the global push for practical quantum networks and quantum computers, an international team of researchers has demonstrated a leap in preserving the quantum coherence of quantum dot spin qubits.

Computer Science: Encryption Computer Science: General Computer Science: Quantum Computers Offbeat: Computers and Math Physics: Quantum Computing Physics: Quantum Physics
Published

Quantum physicists make major nanoscopic advance      (via sciencedaily.com)     Original source 

In a new breakthrough, researchers have solved a problem that has caused quantum researchers headaches for years. The researchers can now control two quantum light sources rather than one. Trivial as it may seem to those uninitiated in quantum, this colossal breakthrough allows researchers to create a phenomenon known as quantum mechanical entanglement. This in turn, opens new doors for companies and others to exploit the technology commercially.

Computer Science: Quantum Computers Engineering: Graphene Offbeat: Computers and Math Physics: Quantum Computing
Published

Scientists observe 'quasiparticles' in classical systems      (via sciencedaily.com) 

Quasiparticles -- long-lived particle-like excitations -- are a cornerstone of quantum physics, with famous examples such as Cooper pairs in superconductivity and, recently, Dirac quasiparticles in graphene. Now, researchers have discovered quasiparticles in a classical system at room temperature: a two-dimensional crystal of particles driven by viscous flow in a microfluidic channel. Coupled by hydrodynamic forces, the particles form stable pairs -- a first example of classical quasiparticles, revealing deep links between quantum and classical dissipative systems.

Chemistry: Thermodynamics Computer Science: Quantum Computers Physics: Quantum Computing
Published

No 'second law of entanglement' after all      (via sciencedaily.com) 

When two microscopic systems are entangled, their properties are linked to each other irrespective of the physical distance between the two. Manipulating this uniquely quantum phenomenon is what allows for quantum cryptography, communication, and computation. While parallels have been drawn between quantum entanglement and the classical physics of heat, new research demonstrates the limits of this comparison. Entanglement is even richer than we have given it credit for.

Physics: Quantum Computing
Published

Physical effect also valid in the quantum world      (via sciencedaily.com) 

Physicists have experimentally proven that an important theorem of statistical physics applies to so-called 'Bose-Einstein condensates.' Their results now make it possible to measure certain properties of the quantum 'superparticles' and deduce system characteristics that would otherwise be difficult to observe.

Physics: Quantum Computing
Published

Approaching the terahertz regime      (via sciencedaily.com) 

A class of nonvolatile memory devices, called MRAM, based on quantum magnetic materials, can offer a thousandfold performance beyond current state-of-the-art memory devices. The materials known as antiferromagnets were previously demonstrated to store stable memory states, but were difficult to read from. This new study paves an efficient way for reading the memory states, with the potential to do so incredibly quickly too.

Computer Science: General Computer Science: Quantum Computers Physics: Quantum Computing
Published

Shedding light on quantum photonics      (via sciencedaily.com) 

As buzz grows ever louder over the future of quantum, researchers everywhere are working overtime to discover how best to unlock the promise of super-positioned, entangled, tunneling or otherwise ready-for-primetime quantum particles, the ability of which to occur in two states at once could vastly expand power and efficiency in many applications.

Computer Science: General Computer Science: Quantum Computers Physics: Quantum Computing
Published

Can you trust your quantum simulator?      (via sciencedaily.com) 

Physicists have developed a protocol to verify the accuracy of quantum experiments.

Computer Science: Quantum Computers Physics: Quantum Computing
Published

Blast chiller for the quantum world      (via sciencedaily.com) 

The quantum nature of objects visible to the naked eye is currently a much-discussed research question. A team has now demonstrated a new method in the laboratory that could make the quantum properties of macroscopic objects more accessible than before. With the method, the researchers were able to increase the efficiency of an established cooling method by an order of a magnitude.

Geoscience: Geomagnetic Storms Geoscience: Severe Weather Offbeat: Earth and Climate
Published

When migrating birds go astray, disturbances in magnetic field may be partly to blame      (via sciencedaily.com) 

Disturbances to Earth's magnetic field can lead birds astray -- a phenomenon scientists call 'vagrancy' -- even in perfect weather, and especially during fall migration. While other factors such as weather likely play bigger roles in causing vagrancy, researchers found a strong correlation between birds that were captured far outside of their expected range and the geomagnetic disturbances that occurred during both fall and spring migrations.

Physics: Quantum Computing
Published

'A perfect little system': Physicists isolate a pair of atoms to observe p-wave interaction strength for the first time      (via sciencedaily.com) 

Physicists have taken a first step in understanding quantum emergence -- the transition from 'one-to-many' particles -- by studying not one, not many, but two isolated, interacting particles. The result is a first, small step toward understanding natural quantum systems, and how they can lead to more powerful and effective quantum simulations. The team has measured the strength of a type of interaction -- known as 'p-wave interactions' -- between two potassium atoms. P-wave interactions are weak in naturally occurring systems, but researchers had long predicted that they have a much higher maximum theoretical limit. The team is the first to confirm that the p-wave force between particles reached this maximum.

Computer Science: Quantum Computers Physics: Quantum Computing
Published

The optical fiber that keeps data safe even after being twisted or bent      (via sciencedaily.com) 

An optical fiber that uses the mathematical concept of topology to remain robust, thereby guaranteeing the high-speed transfer of information, has been created by physicists.

Computer Science: Quantum Computers Physics: Quantum Computing
Published

New quantum computing architecture could be used to connect large-scale devices      (via sciencedaily.com) 

Researchers have demonstrated an architecture that can enable high fidelity and scalable communication between superconducting quantum processors. Their technique can generate and route photons, which carry quantum information, in a user-specified direction. This method could be used to develop a large-scale network of quantum processors that could efficiently communicate with one another.

Physics: Quantum Computing
Published

New type of entanglement lets scientists 'see' inside nuclei      (via sciencedaily.com) 

Nuclear physicists have found a new way to use the Relativistic Heavy Ion Collider (RHIC) to see the shape and details inside atomic nuclei. The method relies on particles of light that surround gold ions as they speed around the collider and a new type of quantum entanglement that's never been seen before.

Physics: Quantum Computing
Published

High-performance visible-light lasers that fit on a fingertip      (via sciencedaily.com) 

Researchers have created visible lasers of very pure colors from near-ultraviolet to near-infrared that fit on a fingertip. The colors of the lasers can be precisely tuned and extremely fast -- up to 267 petahertz per second, which is critical for applications such as quantum optics. The team is the first to demonstrate chip-scale narrow-linewidth and tunable lasers for colors of light below red -- green, cyan, blue, and violet.

Computer Science: Quantum Computers Physics: Quantum Computing
Published

Researchers show a new way to induce useful defects using invisible material properties      (via sciencedaily.com)     Original source 

Much of modern electronic and computing technology is based on one idea: add chemical impurities, or defects, to semiconductors to change their ability to conduct electricity. These altered materials are then combined in different ways to produce the devices that form the basis for digital computing, transistors, and diodes. Indeed, some quantum information technologies are based on a similar principle: adding defects and specific atoms within materials can produce qubits, the fundamental information storage units of quantum computing.

Energy: Alternative Fuels Geoscience: Geology Geoscience: Geomagnetic Storms Geoscience: Severe Weather
Published

New study models the transmission of foreshock waves towards Earth      (via sciencedaily.com) 

As the supersonic solar wind surges towards Earth, its interaction with our planet's magnetic field creates a shock to deflect its flow, and a foreshock filled with electromagnetic waves. How these waves can propagate to the other side of the shock has long remained a mystery.

Chemistry: Thermodynamics Computer Science: Quantum Computers Physics: Quantum Computing
Published

Chaos gives the quantum world a temperature      (via sciencedaily.com) 

Two seemingly different areas of physics are related in subtle ways: Quantum theory and thermodynamics. How can the laws of thermodynamics arise from the laws of quantum physics? This question has now been pursued with computer simulations, which showed that chaos plays a crucial role: Only where chaos prevails do the well-known rules of thermodynamics follow from quantum physics.

Computer Science: Quantum Computers Physics: Quantum Computing
Published

Quantum dots at room temp, using lab-designed protein      (via sciencedaily.com)     Original source 

Quantum dots are normally made in industrial settings with high temperatures and toxic, expensive solvents -- a process that is neither economical nor environmentally friendly. But researchers have now pulled off the process at the bench using water as a solvent, making a stable end-product at room temperature. Their work opens the door to making nanomaterials in a more sustainable way by demonstrating that protein sequences not derived from nature can be used to synthesize functional materials.