Researchers report solid-state quantum leaps
June 28, 2012 // R. Colin Johnson
Separate labs in the U.S. and Europe recently reported progress in adapting solid-state materials to store spintronic quantum states, a critical hurdle on the path to using spintronics in quantum computing.
Many researchers believe that spintronics for quantum computing is the most promising way forward for future computer chips, but few have reliably cast them into solid-state materials. Unfortunately, the most successful experiments today use ultra-cold gases to store quantum spin-states. However, semiconductor R&D labs worldwide are aiming to recast spintronics into traditional solid-state materials.
Researchers at the City College of New York (CCNY) and the University of California-Berkeley (UCB) reported success using laser light to encode the spin-state of atomic nuclei on gallium arsenide chips. Using a technique whereby a scanning laser defines the spin-states on a gallium arsenide chip, the researchers claim they can set-up the initial conditions for a quantum computation that can be quickly reconfigured after completion.
The technique amounts to soft lithography, since it can reconfigure each quantum computation on-the-fly, according to the researchers. The group includes UC Berkeley professor Jeffrey Reimer and CCNY professor Carlos Meriles, along doctoral candiates Jonathan King of UC Berkeley and Yunpu Li of CCNY.
Such rewritable quantum computers would use the laser to encode their spin-states, thus suppressing the tendency of solid-state materials to lose their magnetization during computations. The researchers are currently experimenting with push-pull architectures that the laser could set in order to ensure that the quantum spintronic states remain stable until the end of a computation.
Separately, the current record holders for maintaining a quantum state in a solid-state material recently surpassed their own record, reporting encoded spin states that lasted over three minutes. The researchers at Simon Fraser University and Oxford University reported a 100-time improvement over their 2008 report of 1.75 seconds. Because their solid-state material is conventional silicon, professor Mike Thewalt at Simon Fraser (Canada) and professor John Morton at Oxford (U.K.) claim their technique could enable conventional CMOS manufacturing to eventually be harnessed for future quantum computers.
Both research groups encoded quantum states on the magnetic spin of atomic nuclei, on gallium arsenide and silicon chips respectively, rather than the more conventional approach of encoding spin states on electrons.
Intel, Sheldon Cooper promote 3D camera technology
November 24, 2014
Intel has secured the services of Jim Parsons, who plays Sheldon Cooper on the comedy television series The Big Bang Theory, ...
NXP acquires Quintic's Wearable and BTLE IC business
BMW and Tesla look at car battery alliance
Interview R&S: Communications become mission-critical
The engineering desk-to-bench ratio
Rohm's European Design Center in growth phase
November 21, 2014
At Electronica EE Times Europe caught up with Michael Davis European R&D director at the European Design Center (EDC) of ...
Combo inertial sensor market on 19% CAGR, says Yole.
US, China pushing industrial chip market growth, says IHS
LA Auto Show: Hydrogen fuel cell drive is back
- Halogen-free options and increased performance for terminal blocks
- Wireless Power User Guide
- Secure is the New Smart
- 5 Best Practices for Designing Flexible Test Stations
InterviewInterview R&S: Communications become mission-critical
Driven by new application fields in the Internet of Things (IoT) and machine-to-machine (M2M) context, communications technologies are undergoing massive changes. This goes along with enormous challenges ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Cherry is giving away five of its Energy Harvesting Evaluation kits, worth over 266 Euros each, for EETimes Europe's readers to win. Cherry's energy harvesting technology benefit mostly applications where a complex wire assembly and/or batteries would be inappropriate.
The required RF-energy is created by the mechanical actuation of the switch and the data is transmitted...MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.
Most popular news
- Could magnesium battery innovation end lithium's dominance?
- From warm to cool white: colour-temperature tunable LEDs
- Li-Fi communication module wirelessly transfers data at 1-Gbps
- Supercapacitor innovation promises panel-powered cars in five years
- Rebranding the revolution: the future of IoT is embedded