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  • AzTEC 1.1 mm OBSERVATIONS OF THE MBM12 MOLECULAR CLOUD 

    Kim, M. J.; Kim, S.; Youn, S.; Yun, M. S.; Wislon, Graham W.; Aretxaga, I.; Williams, J. P.; Hughes, D. H.; Humphrey, A.; Austermann, J. E.; Perera, T. A.; Mauskopf, P. D.; Magnani, L.; Kang, Y. W. (American Astronomical Society, 2012-01-19)
    We present 1.1 mm observations of the dust continuum emission from the MBM12 high-latitude molecular cloud observed with the Astronomical Thermal Emission Camera (AzTEC) mounted on the James Clerk Maxwell Telescope on Mauna ...
  • Extremely Red Objects in the Lockman Hole 

    Wilson, Graham W.; Huang, J. S.; Perez-Gonzalez, P. G.; Egami, E.; Ivison, R. J.; Rigby, J. R.; Alonso-Herrero, A.; Barmby, P.; Dole, H.; Fazio, G. G.; Le Floc'h, E.; Papovich, C.; Rigaopoulou, D.; Bai, L.; Engelbracht, C. W.; Frayer, D.; Gordon, K. D.; Hines, D. C.; Misselt, K. A.; Miyazaki, S.; Morrison, J. E.; Rieke, G. H.; Rieke, M. J.; Surace, J. (American Astronomical Society, 2004-05-21)
    We investigate extremely red objects (EROs) using near- and mid-infrared observations in five passbands (3.6 to 24 μm) obtained from the Spitzer Space Telescope, and deep ground-based R and K imaging. The great sensitivity ...
  • New Cosmic Microwave Background Power Spectrum Constraints from MSAM1 

    Wilson, Graham W.; Knox, L.; Dodelson, S.; Coble, K.; Cheng, E. S.; Cottingham, D. A.; Fixsen, D. J.; Goldin, A. B.; Inman, C. A.; Kowitt, M. S.; Meyer, S. S.; Page, L. A.; Punchalla, J. L.; Ruhl, J. E.; Silverberg, R. F. (IOP Publishing, 2000-03-20)
    We present new cosmic microwave background (CMB) anisotropy results from the combined analysis of the three flights of the first Medium Scale Anisotropy Measurement (MSAM1). This balloon-borne bolometric instrument measured ...
  • A Deep VLA survey at 6 cm in the Lockman Hole 

    Ciliegi, P.; Zamorani, G.; Hasinger, G.; Lehmann, I.; Szokoly, G.; Wilson, Graham W. (EDP Sciences, 2003-02-05)
    We have obtained a deep radio image with the Very Large Array at 6 cm in the Lockman Hole. The noise level in the central part of the field is ~ $11~\mu$Jy. From these data we have extracted a catalogue of 63 radio sources ...
  • Synchronization of multiple coupled rf-SQUID flux qubits 

    Harris, R.; Brito, F.; Berkley, A. J.; Jonansson, J.; Johnson, M. W.; Lanting, T.; Bunyk, P.; Ladizinsky, E.; Bumble, B.; Fung, A.; Kaul, A.; Kleinsasser, A.; Han, Siyuan (IOP Publishing, 2009-12-19)
    A practical strategy for synchronizing the properties of compound Josephson junction (CJJ) radio frequency monitored superconducting quantum interference device (rf-SQUID) qubits on a multi-qubit chip has been demonstrated. ...
  • Entanglement dynamics of a superconducting phase qubit coupled to a two-level system 

    Sun, Guozhu; Zhou, Zhongyuan; Mao, Bo; Wen, Xueda; Wu, Peiheng; Han, Siyuan (American Physical Society, 2012-08-01)
    We report the observation and quantitative characterization of driven and spontaneous oscillations of quantum entanglement, as measured by concurrence, in a bipartite system consisting of a macroscopic Josephson phase qubit ...
  • Landau-Zener-Stückelberg interference of microwave-dressed states of a superconducting phase qubit 

    Sun, Guozhu; Wen, Xueda; Mao, Bo; Yu, Yang; Chen, Jian; Xu, Weiwei; Kang, Lin; Wu, Peiheng; Han, Siyuan (American Physical Society, 2011-05-26)
    We present the observation of Landau-Zener-Stückelberg (LZS) interference of the dressed states arising from an artificial atom, a superconducting phase qubit, interacting with a microwave field. The dependence of LZS ...
  • Quantum dynamics of a microwave driven superconducting phase qubit coupled to a two-level system 

    Sun, Guozhu; Wen, Xueda; Mao, Bo; Zhou, Zhongyuan; Yu, Yang; Wu, Peiheng; Han, Siyuan (American Physical Society, 2010-10-01)
    We present an analytical and comprehensive description of the quantum dynamics of a microwave resonantly driven superconducting phase qubit coupled to a microscopic two-level system (TLS), covering a wide range of the ...
  • Quantum and classical resonant escapes of a strongly driven Josephson junction 

    Yu, H. F.; Zhu, X. B.; Peng, Z. H.; Cao, W. H.; Cui, D. J.; Tian, Ye; Chen, G. H.; Zheng, D. N.; Jing, X. N.; Lu, Li; Zhao, S. P.; Han, Siyuan (American Physical Society, 2010-04-28)
    The properties of phase escape in a dc superconducting quantum interference device (SQUID) at 25 mK, which is well below quantum-to-classical crossover temperature Tcr, in the presence of strong resonant ac driving have ...
  • Experimental Demonstration of a Robust and Scalable Flux Qubit 

    Harris, R.; Johansson, J.; Berkley, A. J.; Johnson, M. W.; Lanting, T.; Han, Siyuan; Bunyk, P.; Ladizinsky, E.; Oh, T.; Perminov, I.; Tolkacheva, E.; Uchaikin, S.; Chapple, E. M.; Enderud, C.; Rich, C.; Thom, M.; Wang, J.; Wilson, B.; Rose, G. (American Physical Society, 2010-04-07)
    A rf–superconducting quantum interference device (SQUID) flux qubit that is robust against fabrication variations in Josephson-junction critical currents and device inductance has been implemented. Measurements of the ...
  • Compound Josephson-junction coupler for flux qubits with minimal crosstalk 

    Harris, R.; Lanting, T.; Berkley, A. J.; Johansson, J.; Johnson, M. W.; Bunyk, P.; Ladizinsky, E.; Oh, T.; Han, Siyuan (American Physical Society, 2009-08-20)
    An improved tunable coupling element for building networks of coupled rf-superconducting quantum interference device (rf-SQUID) flux qubits has been experimentally demonstrated. This new form of coupler, based on the ...
  • Microwave-induced phase escape in a Josephson tunnel junction 

    Guozhu, Sun; Yiwen, Wang; Junyu, Cao; Jian, Chen; Zhengming, Ji; Lin, Kang; Weiwei, Xu; Yang, Yu; Han, Siyuan; Peiheng, Wu (American Physical Society, 2008-03-28)
    We perform both theoretical and experimental investigations on the phase escape of a current-biased Josephson tunnel junction under microwave irradiation. The switching current distributions exhibit abundant nonlinear ...
  • Quantum computing with superconducting device: A three-level SQUID qubit 

    Chu, Shih-I; Zhou, Zhongyuan; Han, Siyuan (American Physical Society, 2002-09-05)
    A three-level scheme for implementing single-qubit operations in superconducting quantum interference devices is proposed and analyzed. We show that, compared with the conventional two-level scheme, the proposed three-level ...
  • A cryogen-free dilution refrigerator based Josephson qubit measurement system 

    Tian, Ye; Yu, H. F.; Deng, H.; Xue, G. M.; Liu, D. T.; Ren, Y. F.; Chen, G. H.; Zheng, D. N.; Jing, X. N.; Lu, Li; Zhao, S. P.; Han, Siyuan (American Institute of Physics, 2012-01-12)
    We develop a small-signal measurement system on cryogen-free dilution refrigerator which is suitable for superconductingqubit studies. Cryogen-free refrigerators have several advantages such as less manpower for system ...
  • Population inversion induced by Landau--Zener transition in a strongly driven rf superconducting quantum interference device 

    Sun, Guozhu; Wen, Xueda; Wang, Yiwen; Cong, Shanhua; Chen, Jian; Kang, Lin; Xu, Weiwei; Yu, Yang; Han, Siyuan; Wu, Peiheng (American Institute of Physics, 2009-03-09)
    Microwave resonances between discrete macroscopically distinct quantum states with single photon and multiphoton absorption are observed in a strongly driven radio frequency superconducting quantum interference device flux ...
  • Flux amplification using stochastic superconducting quantum interference devices 

    Rouse, R.; Han, Siyuan; Lukens, J. E. (American Institute of Physics, 1995-01-05)
    The flux change δ Φ through a bistable superconducting quantum interference device has been measured in the presence of thermally induced switching (with rate Γ) versus δ Φ x , the change in the applied flux. For small δ Φ ...
  • Demonstration of Josephson effect submillimeter wave sources with increased power 

    Han, Siyuan; Bi, Baokang; Zhang, Wenxing; Lukens, J. E. (American Institute of Physics, 1994-03-05)
    A submillimeter wave source based on a new design using Josephson junction arrays has been developed and tested. The maximum rf power, delivered to a 68Ω load and detected on chip, was 47 μW at 394 GHz. Significant power ...
  • Observation of coherent oscillation in single-passage Landau-Zener transitions 

    Sun, Guozhu; Wen, Xueda; Gong, Ming; Zhang, Dan-Wei; Yu, Yang; Zhu, Shi-Liang; Chen, Jian; Wu, Peiheng; Han, Siyuan (Macmillian Publishers, 2015-02-16)
    Landau-Zener transition (LZT) has been explored in a variety of physical systems for coherent population transfer between different quantum states. In recent years, there have been various proposals for applying LZT to ...
  • Multilayer film shields for the protection of PMT from constant magnetic field 

    Dmitrenko, V. V.; Besson, David; Nyunt, PhyoWai; Grabchikov, S. S.; Grachev, V. M.; Muraviev-Smirnov, C. C.; Ulin, S. E.; Utechev, Z. M.; Vlasik, K. F. (AIP Publishing, 2015-01-13)
    Photomultiplier tubes (PMTs) are widely used in physical experiments as well as in applied devices. PMTs are sensitive to magnetic field, so creation of effective magnetic shields for their protection is very important. ...
  • Radio-frequency probes of Antarctic ice at South Pole 

    Besson, David Zeke; Kravchenko, I. (Copernicus Publications on behalf of the European Geosciences Union., 2013-05-16)
    Using hardware developed for the ARA (Askaryan Radio Array) particle astrophysics experiment, we herein report on the amplitude and temporal characteristics of polarized surface radar echo data collected in South Polar ice ...

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785-864-8983

KU Libraries
1425 Jayhawk Blvd
Lawrence, KS 66045