Quantum Computing News

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Multiprover Interactive Proof System Gains Power by Exploiting Quantum Entanglement

A big question for researchers in quantum computing is, where does quantum physics give us an advantage? CQT researcher Joe Fitzsimons and his collaborator Thomas Vidick from Caltech have added to the list. Specifically, they give an example of a “multiprover interactive proof system" that gains power by exploiting quantum entanglement.

27 Feb 2015

JQI Researchers Demonstrate Modular Entanglement Between Two Atomic Systems

JQI researchers, under the direction of Christopher Monroe have demonstrated modular entanglement between two atomic systems, separated by one meter. Here, photons are the long distance information carriers entangling multiple qubit modules. Inside of a single module, quantized collective vibrations called phonons connect individual qubits.

26 Feb 2015

New Way to Control Individual Vortices to Improve Performance of Superconducting Wires

Superconductor materials are prized for their ability to carry an electric current without resistance, but this valuable trait can be crippled or lost when electrons swirl into tiny tornado-like formations called vortices. These disruptive mini-twisters often form in the presence of magnetic fields, such as those produced by electric motors.

25 Feb 2015

Quantum Steering Functions as an Essential Resource in Specific Information-Theoretic Tasks

Communication security and metrology could be enhanced through a study of the role of quantum correlations in the distinguishability of physical processes, by researchers at the Universities of Strathclyde and Waterloo.

16 Feb 2015

Many Challenges Persist Before Quantum Annealing Helps Solve Complex Optimisation Problems

Many challenges lie ahead before quantum annealing, the analogue version of quantum computation, contributes to solve combinatorial optimisation problems

From Springer - Science and Technology Publishers 12 Feb 2015

New Design Extends Superposition Time of Qubit a Hundredfold

Quantum computers are experimental devices that promise exponential speedups on some computational problems. Where a bit in a classical computer can represent either a 0 or a 1, a quantum bit, or qubit, can represent 0 and 1 simultaneously, letting quantum computers explore multiple problem solutions in parallel. But such “superpositions” of quantum states are, in practice, difficult to maintain.

31 Jan 2015

Novel Technique to Extend Storage Time of Quantum Memories

The idea of computing systems based on controlling atomic spins just got a boost from new research performed at the Massachusetts Institute of Technology (MIT) and the U.S. Department of Energy's (DOE) Brookhaven National Laboratory.

30 Jan 2015

Researchers Engineer Quantum State Sensitive to the Lorentz-Violating Effects

Ever since Einstein proposed his special theory of relativity in 1905, physics and cosmology have been based on the assumption that space looks the same in all directions - that it's not squeezed in one direction relative to another.

30 Jan 2015

Study Demonstrates Role of Optical Stark Effect in Valleytronics

A potential avenue to quantum computing currently generating quite the buzz in the high-tech industry is “valleytronics,” in which information is coded based on the wavelike motion of electrons moving through certain two-dimensional (2D) semiconductors. Now, a promising new pathway to valleytronic technology has been uncovered by researchers with the Lawrence Berkeley National Laboratory (Berkeley Lab).

27 Jan 2015

New Micro-Ring Entangles Individual Particles of Light

Unlike Bilbo's magic ring, which entangles human hearts, engineers have created a new micro-ring that entangles individual particles of light, an important first step in a whole host of new technologies.

27 Jan 2015