Zobrazeno 1 - 10
of 1 898
pro vyhledávání: '"Ku, H."'
Fabrication of sub-micron Josephson junctions is demonstrated using standard processing techniques for high-coherence, superconducting qubits. These junctions are made in two separate lithography steps with normal-angle evaporation. Most significantl
Externí odkaz:
http://arxiv.org/abs/1705.08993
Autor:
Long, Junling, Ku, H. S., Wu, Xian, Gu, Xiu, Lake, Russell E., Bal, Mustafa, Liu, Yu-xi, Pappas, David P.
Publikováno v:
Phys. Rev. Lett. 120, 083602 (2018)
Electromagnetically induced transparency (EIT) is a signature of quantum interference in an atomic three-level system. By driving the dressed cavity-qubit states of a two-dimensional circuit QED system, we generate a set of polariton states in the ne
Externí odkaz:
http://arxiv.org/abs/1704.08777
Autor:
Ku, H. S., Long, J. L., Wu, X., Bal, M., Lake, R. E., Barnes, Edwin, Economou, Sophia E., Pappas, D. P.
Publikováno v:
Phys. Rev. A 96, 042339 (2017)
It has been known since the early days of quantum mechanics that hyperbolic secant pulses possess the unique property that they can perform cyclic evolution on two-level quantum systems independently of the pulse detuning. More recently, it was reali
Externí odkaz:
http://arxiv.org/abs/1704.00803
Autor:
Ku, H. S., Kindel, W. F., Mallet, F., Glancy, S., Irwin, K. D., Hilton, G. C., Vale, L. R., Lehnert, K. W.
By combining a squeezed propagating microwave field and an unsqueezed vacuum field on a hybrid (microwave beam-splitter), we generate entanglement between the two output modes. We verify that we have generated entangled states by making independent a
Externí odkaz:
http://arxiv.org/abs/1502.03884
Autor:
Kerckhoff, Joseph, Andrews, Reed W., Ku, H. S., Kindel, William F., Cicak, Katarina, Simmonds, Raymond W., Lehnert, K. W.
Publikováno v:
Phys. Rev. X 3, 021013 (2013)
We demonstrate a fully cryogenic microwave feedback network composed of modular superconducting devices connected by transmission lines and designed to control a mechanical oscillator coupled to one of the devices. The network features an electromech
Externí odkaz:
http://arxiv.org/abs/1211.1950
Publikováno v:
Phys. Rev. Lett. 109, 050507 (2012)
We demonstrate initialization by joint measurement of two transmon qubits in 3D circuit quantum electrodynamics. Homodyne detection of cavity transmission is enhanced by Josephson parametric amplification to discriminate the two-qubit ground state fr
Externí odkaz:
http://arxiv.org/abs/1204.2479
Autor:
Mallet, F., Castellanos-Beltran, M. A., Ku, H. S., Glancy, S., Knill, E., Irwin, K. D., Hilton, G. C., Vale, L. R., Lehnert, K. W.
Publikováno v:
Phys. Rev. Lett. 106, 220502 (2011)
We perform state tomography of an itinerant squeezed state of the microwave field prepared by a Josephson parametric amplifier (JPA). We use a second JPA as a pre-amplifier to improve the quantum efficiency of the field quadrature measurement (QM) fr
Externí odkaz:
http://arxiv.org/abs/1012.0007
Autor:
Ku, H. S., Mallet, F., Vale, L. R., Irwin, K. D., Russek, S. E., Hilton, G. C., Lehnert, K. W.
We report on the design, fabrication and testing of two superconducting passive microwave components, a quadrature hybrid and a 20 dB directional coupler. These components are designed to be integrated with superconducting qubits or Josephson paramet
Externí odkaz:
http://arxiv.org/abs/1010.3232
Autor:
Chang, B. C., You, Y. B., Shiu, T. J., Tai, M. F., Ku, H. C., Hsu, Y. Y., Jang, L. Y., Lee, J. F., Wei, Z., Ruan, K. Q., Li, X. G.
Publikováno v:
Phys. Rev. B 80, 165108 (2009)
Anisotropic Fe K-edge and As K-edge X-ray absorption near edge spectrum (XANES) measurements on superconducting (T_c = 52 K) (Sm_{0.95}La_{0.05})FeAs(O_{0.85}F_{0.15}) field-aligned microcrystalline powder are presented. The angular dependence of Fe
Externí odkaz:
http://arxiv.org/abs/0909.3904
The powder alignment method is used to investigate the anisotropic physical properties of the weak-ferromagnetic superconductor system RuSr2RCu2O8 (R = Pr, Nd, Sm, Eu, Gd, Gd0.5Dy0.5). The RuSr2GdCu2O8 cuprate is a weak-ferromagnetic superconductor w
Externí odkaz:
http://arxiv.org/abs/0811.3457