Physical processes affect almost every aspect of our lives, yet physicists still grapple with understanding and modeling the behavior of many such processes—particularly complex quantum physical processes, including certain superconducting effects.
To circumvent the limitations of conventional computers in tackling these problems, physicists have proposed using well-understood quantum systems called ‘quantum simulators’ (or ‘quantum emulators’) to emulate similar, but otherwise poorly understood, quantum systems.
In a review of the different approaches taken in developing these simulators, Iulia Buluta and Franco Nori from the RIKEN Advanced Science Institute, Wako (and the University of Michigan, USA), have concluded that the first practical applications may soon be a reality1.
“Quantum emulators could be employed in fields such as atomic physics or condensed-matter physics,” explains Nori. However, he says, the detailed study of known physical processes is just one advantage: these controllable quantum emulators would also allow the exploration of novel physical processes that are typically hard to study.
Among the various physical systems that could be used to build a quantum simulator, one possibility is the use of regular arrays of atoms or ions that are held in place by laser fields. According to Buluta and Nori, the interactions between these atoms provide a good model for emulating the interaction between other particles in complex systems. To model electrical conductivity, for example, this type of quantum simulator can be used to study the transition from the insulating state to the conducting state, where the atoms switch from being fixed to being free to move.
Buluta and Nori also point out that electronic devices fabricated on a computer chip could be used as a controllable quantum system. In this system, small circuits made from superconducting wires possess quantum physical properties that could be used to model atomic physics problems.
These quantum systems have been demonstrated experimentally (Fig. 1); however, challenges remain until more advanced and versatile quantum simulators can be built. Synchronizing the operation of a large number of components, for example, has not yet been achieved, Buluta notes. From a theoretical viewpoint, she says that much also needs to be learned about meaningfully programming quantum simulators.
Nevertheless, Nori believes that, in contrast to the situation 25 years ago when Richard Feynman first proposed quantum simulators, the experimental demonstrations of the basic components for quantum computers completed to date suggest an optimistic outlook. “The necessary level of control of quantum systems is now within reach,” he says.
The corresponding author for this highlight is based at the Digital Materials Laboratory, RIKEN Advanced Science Institute
Buluta, I. & Nori. F. Quantum simulators. Science 326, 108–111 (2009).
Saeko Okada | Research asia research news
Temperature-controlled fiber-optic light source with liquid core
20.06.2018 | Leibniz-Institut für Photonische Technologien e. V.
New material for splitting water
19.06.2018 | American Institute of Physics
In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.
Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...
Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.
An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.
Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...
13.06.2018 | Event News
08.06.2018 | Event News
05.06.2018 | Event News
21.06.2018 | Earth Sciences
21.06.2018 | Life Sciences
21.06.2018 | Earth Sciences