The piece, entitled, "Optimal Control of Quantum Rings by Terahertz Laser Pulses" (1), proposes new annular structures (quantum rings) to define a qbit, i.e. the unit of information of quantum computers.. The work has been undertaken in collaboration with the Freie-Universität of Berlin and the research team there under university teacher, Eberhard K.U. Gross.
Unlike the binary bit of current computers which only has two possible states – 0 or 1 – the unit of measurement of quantic computers is the qbit which uses a much more complex logic involving multiple states, enabling the much more efficient processing of information. There are many proposed applications for the qbit, some based on quantic points embedded in matrixes, others on magnetic molecules, others on cold atoms, and so on. The UPV/EHU researchers propose a new system based on the interaction of laser light with a metallic structure in the form of a ring and which has been written on lithographically. The advantages of the system are its simplicity and its economy, given that its quantic state can be precisely controlled with light and the technique can be integrated into current electronic structures. Ángel Rubio and his team are currently working on a combination of a number of these structures so that they may interact and operations can be carried out.
This is the fourth research article published by Ángel Rubio in "Physical Review Letters" within the space of a year.
Ángel Rubio is lecturer in the Physics of Condensed Matter at the Faculty of Chemical Sciences at the UPV/EHU, a member of the Donostia Physics Center and an associate of the CSIC-UPV/EHU Physics of Materials Mixed Centre. His research activity is internationally recognised and he has received many awards, notable amongst which are the Award from the Sociedad Española de Física for young researchers (1992); the Friedrich Wilhelm Bessel research prize from the Humboldt Foundation (2005) and the DuPont Award for Science (2006).
(1) E. Räsänen, A. Castro, J. Werschnik, A. Rubio, and E. K. U. Gross Optimal Laser-Control of Quantum Rings, (Physical Review Letters (Vol.98, No.15).
Irati Kortabitarte | alfa
Move over, lasers: Scientists can now create holograms from neutrons, too
21.10.2016 | National Institute of Standards and Technology (NIST)
Finding the lightest superdeformed triaxial atomic nucleus
20.10.2016 | The Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.
In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...
'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.
Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
21.10.2016 | Health and Medicine
21.10.2016 | Information Technology
21.10.2016 | Materials Sciences