| Records |
| Author |
Feofanov, A. K.; Oboznov, V. A.; Bol'Ginov, V. V.; Lisenfeld, J.; Poletto, S.; Ryazanov, V. V.; Rossolenko, A. N.; Khabipov, M.; Balashov, D.; Zorin, A. B.; Dmitriev, P. N.; Koshelets, V. P.; Ustinov, A. V. |
| Title |
Implementation of superconductor/ferromagnet/ superconductor |
Type |
Journal Article |
| Year |
2010 |
Publication |
Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
6 |
Issue |
8 |
Pages |
593-597 |
| Keywords |
fromIPMRAS |
| Abstract |
High operation speed and low energy consumption may allow the superconducting digital single-flux-quantum circuits to outperform traditional complementary metal-oxide-semiconductor logic. The remaining major obstacle towards high element densities on-chip is a relatively large cell size necessary to hold a magnetic flux quantum Φ0. Inserting a π-type Josephson junction in the cell is equivalent to applying flux Φ0/2 and thus makes it possible to solve this problem. Moreover, using π-junctions in superconducting qubits may help to protect them from noise. Here we demonstrate the operation of three superconducting circuits-two of them are classical and one quantum-that all utilize such π-phase shifters realized using superconductor/ferromagnet/superconductor sandwich technology. The classical circuits are based on single-flux-quantum cells, which are shown to be scalable and compatible with conventional niobium-based superconducting electronics. The quantum circuit is a π-biased phase qubit, for which we observe coherent Rabi oscillations. We find no degradation of the measured coherence time compared to that of a reference qubit without a π-junction. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
|
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
Notes  |
|
Approved |
no |
| Call Number |
RPLAB @ gujma @ |
Serial |
805 |
| Permanent link to this record |
| |
|
| |
| Author |
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. |
| Title |
Quantum non-demolition detection of single microwave photons in a circuit |
Type |
Journal Article |
| Year |
2010 |
Publication |
Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
6 |
Issue |
9 |
Pages |
663-667 |
| Keywords |
fromIPMRAS |
| Abstract |
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. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
|
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
no |
| Call Number |
RPLAB @ gujma @ |
Serial |
806 |
| Permanent link to this record |
| |
|
| |
| Author |
Haviland, David |
| Title |
Superconducting circuits: Quantum phase slips |
Type |
Journal Article |
| Year |
2010 |
Publication |
Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
6 |
Issue |
|
Pages |
565–566 |
| Keywords |
fromIPMRAS |
| Abstract |
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. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
|
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
no |
| Call Number |
RPLAB @ gujma @ |
Serial |
807 |
| Permanent link to this record |
| |
|
| |
| Author |
Saunders, D. J.; Jones, S. J.; Wiseman, H. M.; Pryde, G. J. |
| Title |
Experimental EPR-steering using Bell-local states |
Type |
Journal Article |
| Year |
2010 |
Publication |
Nat. Phys. |
Abbreviated Journal |
Nat. Phys. |
| Volume |
6 |
Issue |
11 |
Pages |
845-849 |
| Keywords |
fromIPMRAS |
| Abstract |
The concept of `steering' was introduced in 1935 by Schrödinger as a generalization of the EPR (Einstein-Podolsky-Rosen) paradox. It has recently been formalized as a quantum-information task with arbitrary bipartite states and measurements, for which the existence of entanglement is necessary but not sufficient. Previous experiments in this area have been restricted to an approach that followed the original EPR argument in considering only two different measurement settings per side. Here we demonstrate experimentally that EPR-steering occurs for mixed entangled states that are Bell local (that is, that cannot possibly demonstrate Bell non-locality). Unlike the case of Bell inequalities, increasing the number of measurement settings beyond two-we use up to six-significantly increases the robustness of the EPR-steering phenomenon to noise. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
|
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
no |
| Call Number |
RPLAB @ gujma @ |
Serial |
808 |
| Permanent link to this record |
| |
|
| |
| Author |
Toyabe, Shoichi; Sagawa, Takahiro; Ueda, Masahito; Muneyuki, Eiro; Sano, Masaki |
| Title |
Experimental demonstration of information-to-energy conversion and validation of the generalized Jarzynski equality |
Type |
Journal Article |
| Year |
2010 |
Publication |
Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
6 |
Issue |
12 |
Pages |
988-992 |
| Keywords |
fromIPMRAS |
| Abstract |
In 1929, Leo Szilard invented a feedback protocol in which a hypothetical intelligence called Maxwell's demon pumps heat from an isothermal environment and transduces it to work. After an intense controversy that lasted over eighty years; it was finally clarified that the demon's role does not contradict the second law of thermodynamics, implying that we can convert information to free energy in principle. Nevertheless, experimental demonstration of this information-to-energy conversion has been elusive. Here, we demonstrate that a nonequilibrium feedback manipulation of a Brownian particle based on information about its location achieves a Szilard-type information-energy conversion. Under real-time feedback control, the particle climbs up a spiral-stairs-like potential exerted by an electric field and obtains free energy larger than the amount of work performed on it. This enables us to verify the generalized Jarzynski equality, or a new fundamental principle of “information-heat engine” which converts information to energy by feedback control. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
|
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
no |
| Call Number |
RPLAB @ gujma @ |
Serial |
831 |
| Permanent link to this record |
| |
|
| |
| Author |
Home, Jonathan |
| Title |
Quantum entanglement: Watching correlations disappear |
Type |
Journal Article |
| Year |
2010 |
Publication |
Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
6 |
Issue |
12 |
Pages |
938-939 |
| Keywords |
fromIPMRAS |
| Abstract |
Engineered decoherence enables tracking of multipartite entanglement as a quantum state decays. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
|
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
no |
| Call Number |
RPLAB @ gujma @ |
Serial |
832 |
| Permanent link to this record |
| |
|
| |
| Author |
Saffman, Mark |
| Title |
Quantum computing: A quantum telecom link |
Type |
Journal Article |
| Year |
2010 |
Publication |
Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
6 |
Issue |
11 |
Pages |
838-839 |
| Keywords |
fromIPMRAS |
| Abstract |
Converting data-carrying photons to telecommunication wavelengths enables distribution of quantum information over long distances. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
|
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
no |
| Call Number |
RPLAB @ gujma @ |
Serial |
833 |
| Permanent link to this record |
| |
|
| |
| Author |
Raussendorf, Robert |
| Title |
Quantum computing: Shaking up ground states |
Type |
Journal Article |
| Year |
2010 |
Publication |
Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
6 |
Issue |
11 |
Pages |
840-841 |
| Keywords |
fromIPMRAS |
| Abstract |
Measurement-based quantum computation with an Affleck-Kennedy-Lieb-Tasaki state is experimentally realized for the first time. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
|
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
no |
| Call Number |
RPLAB @ gujma @ |
Serial |
834 |
| Permanent link to this record |
| |
|
| |
| Author |
Buchanan, Mark |
| Title |
Body of evidence |
Type |
Manuscript |
| Year |
2010 |
Publication |
Nature Physics |
Abbreviated Journal |
Nat. Phys. |
| Volume |
6 |
Issue |
|
Pages |
|
| Keywords |
fromIPMRAS |
| Abstract |
|
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
|
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
no |
| Call Number |
RPLAB @ gujma @ |
Serial |
837 |
| Permanent link to this record |
| |
|
| |
| Author |
Hoeffgen, S.K.; Kuhnhenn, J.; Weinand, U. |
| Title |
High radiation sensitivity of chiral long period gratings |
Type |
Journal Article |
| Year |
2010 |
Publication |
IEEE Trans. Nucl. Sci. |
Abbreviated Journal |
|
| Volume |
57 |
Issue |
5 |
Pages |
2915 - 2922 |
| Keywords |
chiral fiber gratings, chiral gratings, chiral LPG, from chiralphotonics |
| Abstract |
The radiation sensitivity of chiral long period gratings was investigated for the first time. After a Co-60 gamma dose of 100 kGy they show radiation-induced changes of their transmission dip wavelength of up to 10 nm, which is 100 to 1000 times higher than the radiation-induced wavelength shift of different fiber Bragg grating types. They can therefore be used as radiation sensors down to doses of 10 Gy or even below, but not for accurate dose measurements since the size of the wavelength shift after a certain dose still depends on the radiation dose rate. Chiral gratings made of eight single mode fiber types with differences of their radiation-induced attenuation of several orders of magnitude were investigated in order to look for a correlation between dip wavelength shift and fiber attenuation. However, the dip wavelength curves do not show exactly the same order as the fiber attenuation curves. A theory that can exactly predict all properties of the chiral gratings might enable us to specify from our results an optimized fiber for the production of gratings that can also be used for radiation dosimetry. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
|
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
no |
| Call Number |
|
Serial |
848 |
| Permanent link to this record |
| |
|
| |
| Author |
Doerr, C.R.; Zhang, C.; Winzer, P.J. |
| Title |
Monolithic InP multi-wavelength coherent receiver |
Type |
Conference Article |
| Year |
2010 |
Publication |
Conference on optical fiber communication, collocated national fiber optic engineers conference |
Abbreviated Journal |
Conf. OFC/NFOEC |
| Volume |
|
Issue |
|
Pages |
1-3 |
| Keywords |
InP balanced detector, waveguide grating, polarization splitter, from chiralphotonics |
| Abstract |
We propose and demonstrate a novel four-channel monolithic polarization-diversity dual-quadrature coherent receiver with balanced detection in InP. It uses an interleave-chirped arrayed waveguide grating that acts simultaneously as a demultiplexer, 90° hybrid, and polarization splitter. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
|
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
no |
| Call Number |
|
Serial |
851 |
| Permanent link to this record |
| |
|
| |
| Author |
Lee, B. G.; Doany, F. E.; Assefa, S.; Green, W.; Yang, M.; Schow, C. L.; Jahnes, C. V.; Zhang, S.; Singer, J.; Kopp, V. I.; Kash, J. A.; Vlasov, Y. A. |
| Title |
20-μm-pitch eight-channel monolithic fiber array coupling 160 Gb/s/channel to silicon nanophotonic chip |
Type |
Conference Article |
| Year |
2010 |
Publication |
Conf. OFC/NFOEC |
Abbreviated Journal |
Conf. OFC/NFOEC |
| Volume |
|
Issue |
|
Pages |
1-3 |
| Keywords |
spot size converters, SSC, optical waveguides, optical fiber waveguides, ultra-dense silicon waveguide arrays, silicon waveguides, waveguide arrays, from chiralphotonics |
| Abstract |
A multichannel tapered coupler interfacing standard 250-μm-pitch low-NA polarization-maintaining fiber arrays with ultra-dense 20-μm-pitch high-NA silicon waveguides is designed, fabricated, and tested, demonstrating coupling losses below 1 dB and injection bandwidths of 160 Gb/s/channel. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
|
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
Conference on optical fiber communication, collocated national fiber optic engineers conference |
| Notes |
|
Approved |
no |
| Call Number |
|
Serial |
852 |
| Permanent link to this record |
| |
|
| |
| Author |
Churikov, Victor M.; Kopp, Victor I.; Genack, Azriel Z. |
| Title |
Chiral diffraction gratings in twisted microstructured fibers |
Type |
Journal Article |
| Year |
2010 |
Publication |
Optics Letters |
Abbreviated Journal |
Opt. Lett. |
| Volume |
35 |
Issue |
3 |
Pages |
342-344 |
| Keywords |
chiral diffracion gratings, optical fiber gratings, from chiralphotonics |
| Abstract |
We observed dips in transmission spectra of uniformly twisted pure-silica microstructured fibers. The spectral positions of the dips and their insensitivity to the surrounding medium are consistent with Bragg diffraction from the helical structure. The reproducibility of the variation of the dip wavelength with temperature up to 1000°C makes the chiral diffraction grating suitable for high-temperature sensing. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
|
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
no |
| Call Number |
|
Serial |
853 |
| Permanent link to this record |
| |
|
| |
| Author |
Kataoka, T; Kajikawa, K.; Kitagawa, J.; Kadoya, Y; Takemura, Y. |
| Title |
Improved sensitivity of terahertz detection by GaAs photoconductive antennas excited at 1560 nm |
Type |
Journal Article |
| Year |
2010 |
Publication |
Appl. Phys. Lett. |
Abbreviated Journal |
Appl. Phys. Lett. |
| Volume |
97 |
Issue |
|
Pages |
201110 (1-3) |
| Keywords |
photoconductive antenna (PCA) |
| Abstract |
The terahertz detection by photoconductive antennas (PCAs) based on low-temperature grown (LTG) GaAs with 1.5 μm pulse excitation was revisited. We found that the detection efficiency can be improved by a factor of 10 (20 dB) by reducing the excitation spot size and the gap length of the PCA, maintaining the low noise feature of the PCA on LTG GaAs. As a result, the signal-to-noise ratio higher than 50 dB was obtained at a reasonable incident power of 9.5 mW, suggesting that the scheme is promising for the detection of terahertz waves in practical time domain systems. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
|
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
no |
| Call Number |
|
Serial |
904 |
| Permanent link to this record |
| |
|
| |
| Author |
Diana Prado Lopes Aude |
| Title |
Modeling superconductors using surface impedance technique |
Type |
Book Whole |
| Year |
2010 |
Publication |
MIT |
Abbreviated Journal |
MIT |
| Volume |
|
Issue |
|
Pages |
|
| Keywords |
homogeneous isotropic BCS superconductor complex conductivity superconductor surface impedance |
| Abstract |
|
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
|
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
|
Approved |
no |
| Call Number |
|
Serial |
938 |
| Permanent link to this record |
