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Williams, Benjamin S. |
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Terahertz quantum-cascade lasers |
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2007 |
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Nature Photonics |
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1 |
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517-525 |
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QCL review |
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Six years after their birth, terahertz quantum-cascade lasers can now deliver milliwatts or more of continuous-wave coherent radiation throughout the terahertz range — the spectral regime between millimetre and infrared wavelengths, which has long resisted development. This paper reviews the state-of-the-art and future prospects for these lasers, including efforts to increase their operating temperatures, deliver higher output powers and emit longer wavelengths. |
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632 |
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Freer, Erik M.; Grachev, Oleg; Duan, Xiangfeng; Martin, Samuel; Stumbo, David P. |
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High-yield self-limiting single-nanowire assembly with dielectrophoresis |
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Journal Article |
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2010 |
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Nature Nanotechnology |
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Nat. Nanotech. |
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5 |
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7 |
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525–530 |
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Single-crystal nanowire transistors and other nanowire-based devices could have applications in large-area and flexible electronics if conventional top-down fabrication techniques can be integrated with high-precision bottom-up nanowire assembly. Here, we extend dielectrophoretic nanowire assembly to achieve a 98.5% yield of single nanowires assembled over 16,000 patterned electrode sites with submicrometre alignment precision. The balancing of surface, hydrodynamic and dielectrophoretic forces makes the self-assembly process controllable, and a hydrodynamic force component makes it self-limiting. Our approach represents a methodology to quantify nanowire assembly, and makes single nanowire assembly possible over an area limited only by the ability to reproduce process conditions uniformly. |
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SSPD |
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RPLAB @ gujma @ |
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683 |
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Biercuk, Michael J. |
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A quantum spectrum analyser |
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2011 |
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Nature Physics |
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Nat. Phys. |
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7 |
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525–526 |
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fromIPMRAS |
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Noise filters based on so-called dynamical decoupling pulse sequences can suppress decoherence in quantum systems. Turning this idea on its head now provides a new technique for studying the noise itself. |
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826 |
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Perseguers, S.; Lewenstein, M.; Acín, A.; Cirac, J. I. |
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Quantum random networks |
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2010 |
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Nature Physics |
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Nat. Phys. |
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6 |
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7 |
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539-543 |
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fromIPMRAS |
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Quantum mechanics offers new possibilities to process and transmit information. In recent years, algorithms and cryptographic protocols exploiting the superposition principle and the existence of entangled states have been designed. They should allow us to realize communication and computational tasks that outperform any classical strategy. Here we show that quantum mechanics also provides fresh perspectives in the field of random networks. Already the simplest model of a classical random graph changes markedly when extended to the quantum case, where we obtain a distinct behaviour of the critical probabilities at which different subgraphs appear. In particular, in a network of N nodes, any quantum subgraph can be generated by local operations and classical communication if the entanglement between pairs of nodes scales as N-2. This result also opens up new vistas in the domain of quantum networks and their applications. |
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804 |
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Author |
Haviland, David |
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Superconducting circuits: Quantum phase slips |
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2010 |
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Nature Physics |
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Nat. Phys. |
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6 |
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565–566 |
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Coulomb interactions can cause a rapid change in the phase of the wavefunction along a very narrow superconducting system. Such a phase slip at the quantum level is now measured in a chain of Josephson junctions. |
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RPLAB @ gujma @ |
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807 |
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