Latest Quantum information science Stories
Team successfully decoupled a single quantum spin from its surroundingsFinding ways to control matter at the level of single atoms and electrons fascinates many scientists and engineers because the ability to manipulate single charges and single magnetic moments (spins) may help researchers penetrate deep into the mysteries of quantum mechanics and modern solid-state physics. It may also allow development of new, highly sensitive magnetometers with nanometer resolution, single-spin...
An international research group led by scientists from the University of Bristol has developed a new approach to quantum computing that could soon be used to perform complex calculations that cannot be done by today's computers.Scientists from Bristol's Centre for Quantum Photonics have developed a silicon chip that could be used to perform complex calculations and simulations using quantum particles in the near future. The researchers believe that their device represents a new route to a...
Tokyo, Sept 10, 2010 - (JCN Newswire) - Institute for Nano Quantum Information Electronics, The University of Tokyo (Director: Yasuhiko Arakawa), Fujitsu Laboratories Limited, and NEC Corporation today announced that they have achieved quantum cryptographic key distribution(1) at a world-record distance of 50 km using transmission from a single-photon emitter(2). This result was the product of the three-way collaboration between the University of Tokyo, Fujitsu,...
International collaboration tackles the problemThe Norwegian University of Science and Technology (NTNU) and the University of Erlangen-Nürnberg together with the Max Planck Institute for the Science of Light in Erlangen have recently developed and tested a technique exploiting imperfections in quantum cryptography systems to implement an attack.Countermeasures were also implemented within an ongoing collaboration with leading manufacturer ID Quantique.Quantum cryptography is a technology...
Dr. David Awschalom, professor of physics at the University of California, Santa Barbara has been selected as the recipient of the 2010 Materials Research Society Turnbull award for research funded in large measure by the Air Force Office of Scientific Research.The David Turnbull Award, one of the three highest honors bestowed upon scientists by MRS, will be awarded to Dr. Awschalom at the MRS Fall Meeting in Boston, Ma. for his achievements and leadership in establishing the field of...
Physicists demonstrate means for quantum bits to communicate over long distancesA team of Harvard physicists led by Mikhail D. Lukin has achieved the first-ever quantum entanglement of photons and solid-state materials. The work marks a key advance toward practical quantum networks, as the first experimental demonstration of a means by which solid-state quantum bits, or "qubits," can communicate with one another over long distances.Quantum networking applications such as...
Uncertainty in the presence of a quantum memoryA quantum particle is hard to grasp, because one cannot determine all its properties precisely at the same time. Measurements of certain parameter pairs such as position and momentum remain inaccurate to a degree given by Heisenberg's Uncertainty Principle. This is important for the security of quantum cryptography, where information is transmitted in the form of quantum states such as the polarization of particles of light. A group of scientists...
Location-based security is ensured by using quantum mechanicsA research group led by computer scientists at the UCLA Henry Samueli School of Engineering and Applied Science has proved that cryptography "” the practice and study of hiding information "” that is based solely on physical location is possible by using quantum mechanics.Such a method, the researchers say, allows one to encrypt and decrypt data at a secure location without pre-sharing any cryptographic keys that can be used to...
Recently, academic debate has been swirling around the existence of unusual quantum mechanical effects in the most ubiquitous of phenomena, including photosynthesis, the process by which organisms convert light into chemical energy. In particular, physicists have suggested that entanglement (the quantum interconnection of two or more objects like photons, electrons, or atoms that are separated in physical space) could be occurring in the photosynthetic complexes of plants, particularly in the...
Physicists at the National Institute of Standards and Technology (NIST) have demonstrated an ion trap with a built-in optical fiber that collects light emitted by single ions (electrically charged atoms), allowing quantum information stored in the ions to be measured. The advance could simplify quantum computer design and serve as a step toward swapping information between matter and light in future quantum networks.Described in a forthcoming issue of Physical Review Letters,* the new device...
