Tag Archives: Physics

Quantum world record smashed

Qubits survive at room temperature for a world-record 39 minutes A normally fragile quantum state has been shown by Oxford University researchers to survive at room temperature for a world record 39 minutes. An artistic rendition of a “bound exciton” quantum state used to prepare and read out information stored in the form of quantum […]

Why don’t we have fusion yet?

The preamplifiers of the National Ignition Facility. The unified lasers deliver 1.8 megajoules of energy and 500 terawatts of power — 1,000 times more than the United States uses at any one moment. (Credit: Damien Jemison/LLNL) The dream of igniting a self-sustained fusion reaction with high yields of energy, a feat likened to creating a miniature […]

Is faster-than-light travel possible?

Alcubierre warp drive (credit: Anderson Institute) Engineers at NASA Johnson Space Center are designing instruments to find out, by slightly warping the trajectory of a photon and measuring the distance it travels, The New York Times reports. Inspiration for the research came from Mexican physicist Miguel Alcubierre, who proposed in 1994 a method of stretching space in […]

A quantum computing solution for unstructured search

Bose-Einstein condensate (credit: Wikimedia Commons) Tom Wong, a graduate student in physics and David Meyer, professor of mathematics at the University of California, San Diego, have proposed a new algorithm for quantum computing, that will speed up unstructured search. The goal is to locate a particular item within an unsorted pile of data. Solving this problem on a […]

Making quantum encryption practical

Part of Alice’s optical parametric amplifier receiver. This receiver enables her to obtain the quantum-illumination performance advantage that ensures Bob’s communication to her is immune to Eve’s passive eavesdropping. (Credit: Zheshen Zhang et al./MIT) Researchers in the Optical and Quantum Communications Group at MIT’s Research Laboratory of Electronics (RLE) have experimentally demonstrated a new quantum communication protocol that solves two basic problems with […]

Which is faster: conventional or quantum computer?

D-Wave quantum computer much faster for specific problems The D-Wave Systems Fridge with Cryogenic Packaging (credit: Amherst College) A computer science professor at Amherst College has conducted experiments to test the speed of a quantum computing system (from D-Wave) against conventional computing methods. “Ours is the first paper to my knowledge that compares the quantum approach to conventional methods using […]

Google and NASA launch Quantum Artificial Intelligence Lab

The chip at the heart of one of D-Wave’s computers (credit: D-Wave) Google, in partnership with NASA and the Universities Space Research Association (USRA), has launched an initiative to investigate how quantum computing might lead to breakthroughs in machine learning, a branch of AI that focuses on construction and study of systems that learn from data.. The new lab will use […]

Harnessing the energy of 2,000 suns

Rendering by Airlight Energy of the prototype HCPVT system under development The Swiss Commission for Technology and Innovation has awarded scientists a $2.4 million (2.25 million CHF) grant to develop an affordable photovoltaic system capable of concentrating solar radiation 2,000 times and converting 80 percent of the incoming radiation into useful energy.* The system would also provide […]

All-optical switching promises terahertz-speed hard drive and RAM memory

Magnetic structure in a colossal magneto-resistive manganite is switched from antiferromagnetic to ferromagnetic ordering during about 100 femtosecond laser pulse photo-excitation (credit: DOE Ames Laboratory) Researchers at the U.S. Department of Energy’s Ames Laboratory, Iowa State University, and the University of Crete in Greece have found a new way to switch magnetism that is at least 1000 […]