Quantum optics: Putting quantum memories on ice

A new idea for 'freezing-out' unwanted losses in an atomic memory could make it possible to store light pulses on-chip for several minutes, increasing the capability of optical quantum computing.

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            • Speed Limit on the Quantum Highway
              Physicists at the Max Planck Institute of Quantum Optics have measured the propagation velocity of quantum signals in a many-body system. A quantum computer based on quantum particles instead of classical bits, can in principle outperform any classical computer.
            • Speed limit on the quantum highway: Physicists measure propagation velocity of quantum signals in a many-body system
              A quantum computer based on quantum particles instead of classical bits, can in principle outperform any classical computer. However, it still remains an open question, how fast and how efficient quantum computers really may be able to work. A critical limitation will be given by the velocity with which a quantum signal can spread within a processing unit. For the first time, a group of ...
            • With single laser pulses on single molecules
              Physicists at MPQ succeed in resolving the internal dynamics of individual molecules using UV femtosecond laser pulses Nowadays, large laser systems provide ultra-short light pulses of very high intensity which in principle allow the imaging of matter and its dynamics on atomic scales, down to a single molecule or a virus.
            • Forget transparent aluminum: researchers make iron invisible to X-rays
              Transparency is generally a property of a material's density or crystal structure, and varies depending on the wavelength of light. However, transparency can also be achieved by exploiting quantum interference between energy level transitions in atoms. Up until now, such transparency has been confined to optical wavelengths, due to the typical energies of atomic transitions. Transitioning ...
            • Leading Exoplanet Hunters Awarded Science Prize
              Winners are the astronomers behind La Silla’s world-leading HARPS instrument World-renowned Swiss astronomers Michel Mayor and Didier Queloz of the Geneva Observatory have been awarded the 2011 BBVA Foundation Frontiers of Knowledge Award in Basic Sciences for their work on exoplanets. The foundation recognized their groundbreaking efforts in developing “new astronomical instruments and ...
            • Could Simple Experiments Reveal the Quantum Nature of Spacetime?
              Could Simple Experiments Reveal the Quantum Nature of Spacetime?
            • Australia Day honours: full list
              The full 2012 Australia Day honours list.
            • Quantum mechanics enables perfectly secure cloud computing
              Researchers have succeeded in combining the power of quantum computing with the security of quantum cryptography and have shown that perfectly secure cloud computing can be achieved using the principles of quantum mechanics. They have performed an experimental demonstration of quantum computation in which the input, the data processing, and the output remain unknown to the quantum computer. The ...
            • Perfectly secure cloud computing possible thanks to quantum physics
              As numerous companies continue their push to get us to entrust our data to the cloud, there are many still justifiably concerned about the security of cloud computing-based services. Now an international team of scientists have demonstrated that perfectly secure cloud computing is possible by combining the power of quantum computing with the security of quantum cryptography. They carried out ...
            • Many bodies make one coherent burst of light: Researchers see superfluorescence from solid-state material
              In a flash, the world changed for Tim Noe – and for physicists who study what they call many-body problems. The Rice University graduate student was the first to see, in the summer of 2010, proof of a theory that solid-state materials are capable of producing an effect known as superfluorescence.