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| Author |
Gabay, Marc; Triscone, Jean-Marc |
| Title |
Superconductors: Terahertz superconducting switch |
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Journal Article |
| Year |
2011 |
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Nature Photonics |
Abbreviated Journal |
Nat. Photon. |
| Volume |
5 |
Issue |
8 |
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447-449 |
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fromIPMRAS |
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The use of terahertz pulses to 'gate' interlayer charge transport in a superconductor could lead to a variety of new and interesting applications. |
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RPLAB @ gujma @ |
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777 |
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Johnson, B. R.; Reed, M. D.; Houck, A. A.; Schuster, D. I.; Bishop, Lev S.; Ginossar, E.; Gambetta, J. M.; Dicarlo, L.; Frunzio, L.; Girvin, S. M.; Schoelkopf, R. J. |
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Quantum non-demolition detection of single microwave photons in a circuit |
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Journal Article |
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2010 |
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Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
6 |
Issue |
9 |
Pages |
663-667 |
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fromIPMRAS |
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Thorough control of quantum measurement is key to the development of quantum information technologies. Many measurements are destructive, removing more information from the system than they obtain. Quantum non-demolition (QND) measurements allow repeated measurements that give the same eigenvalue. They could be used for several quantum information processing tasks such as error correction, preparation by measurement and one-way quantum computing. Achieving QND measurements of photons is especially challenging because the detector must be completely transparent to the photons while still acquiring information about them. Recent progress in manipulating microwave photons in superconducting circuits has increased demand for a QND detector that operates in the gigahertz frequency range. Here we demonstrate a QND detection scheme that measures the number of photons inside a high-quality-factor microwave cavity on a chip. This scheme maps a photon number, n, onto a qubit state in a single-shot by means of qubit-photon logic gates. We verify the operation of the device for n=0 and 1 by analysing the average correlations of repeated measurements, and show that it is 90% QND. It differs from previously reported detectors because its sensitivity is strongly selective to chosen photon number states. This scheme could be used to monitor the state of a photon-based memory in a quantum computer. |
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RPLAB @ gujma @ |
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806 |
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Korotkov, Alexander N. |
| Title |
Entanglement preservation: The Sleeping Beauty approach |
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Journal Article |
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2012 |
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Nature Physics |
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Nat. Phys. |
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8 |
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2 |
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107-108 |
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Two-qubit entanglement can be preserved by partially measuring the qubits to leave them in a 'lethargic' state. The original state is restored using quantum measurement reversal after the qubits have travelled through a decoherence channel. |
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814 |
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| Author |
Wu, Ming C. |
| Title |
Optoelectronic tweezers |
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Journal Article |
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2011 |
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Nature Photonics |
Abbreviated Journal |
Nature Photon |
| Volume |
5 |
Issue |
6 |
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322-324 |
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Using projected light patterns to form virtual electrodes on a photosensitive substrate, optoelectronic tweezers are able to grab and move micro- and nanoscale objects at will, facilitating applications far beyond biology and colloidal science. |
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RPLAB @ gujma @ |
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775 |
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Bonifas, Andrew P.; McCreery, Richard L. |
| Title |
‘Soft’ Au, Pt and Cu contacts for molecular junctions through surface-diffusion-mediated deposition |
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Journal Article |
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2010 |
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Nature Nanotechnology |
Abbreviated Journal |
Nat. Nanotech. |
| Volume |
5 |
Issue |
8 |
Pages |
612–617 |
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Virtually all types of molecular electronic devices depend on electronically addressing a molecule or molecular layer through the formation of a metallic contact. The introduction of molecular devices into integrated circuits will probably depend on the formation of contacts using a vapour deposition technique, but this approach frequently results in the metal atoms penetrating or damaging the molecular layer. Here, we report a method of forming 'soft' metallic contacts on molecular layers through surface-diffusion-mediated deposition, in which the metal atoms are deposited remotely and then diffuse onto the molecular layer, thus eliminating the problems of penetration and damage. Molecular junctions fabricated by this method exhibit excellent yield (typically >90%) and reproducibility, and allow examination of the effects of molecular-layer structure, thickness and contact work function. |
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682 |
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