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101.
Ohne Zusammenfassung 相似文献
102.
Aoki T Takei N Yonezawa H Wakui K Hiraoka T Furusawa A van Loock P 《Physical review letters》2003,91(8):080404
A continuous-variable tripartite entangled state is experimentally generated by combining three independent squeezed vacuum states, and the variances of its relative positions and total momentum are measured. We show that the measured values violate the separability criteria based on the sum of these quantities and prove the full inseparability of the generated state. 相似文献
103.
J.H.V. Price T.M. Monro K. Furusawa W. Belardi J.C. Baggett S. Coyle C. Netti J.J. Baumberg R. Paschotta D.J. Richardson 《Applied physics. B, Lasers and optics》2003,77(2-3):291-298
We report supercontinuum generation extending to 300 nm in the UV from a pure-silica holey fiber. The broad spectrum was obtained by launching ultra-short pulses (150 fs, 10 nJ at 820 nm) from an amplified Ti:sapphire laser. The extension of holey-fiber-based supercontinuum generation into the UV should prove to be of immediate application in spectroscopy. By slightly detuning the launch conditions we excited a higher order spatial mode, which produced a narrower supercontinuum, but with enhanced conversion efficiency at a series of blue/UV peaks around 360 nm. We present numerical simulations, which suggest that differences in the dispersion profiles between the modes are an important factor in explaining this enhancement. In a related experiment, using the same laser source and fiber, we demonstrate a visible supercontinuum from several subsidiary cores, with distinct colours in each core. The subsidiary cores were excited by an appropriate input coupling. Fabrication of a fiber with a range of core sizes (dispersion profiles) for tailored supercontinuum generation can therefore be envisaged for practical applications. PACS 42.72.Bj; 42.79.Nv; 42.81.Dp 相似文献
104.
105.
Malinowski A Piper A Price JH Furusawa K Jeong Y Nilsson J Richardson DJ 《Optics letters》2004,29(17):2073-2075
We have demonstrated an ultrashort-pulse Yb3+-fiber laser and amplifier system that produces >400-nJ pulses at a repetition rate of 62 MHz (>25-W average power). The output pulses were recompressed to a duration of 110 fs with good pulse quality by use of a standard bulk grating-based compressor. 相似文献
106.
H. A. Furusawa J. E. S. Sarkis M. H. Kakazu C. Rodrigues 《Journal of Radioanalytical and Nuclear Chemistry》1999,242(3):647-651
A sector field mass spectrometer using an inductively coupled plasma as an ion source was used in order to determine the uranium
isotopic ratios in reference materials supplied by the National Institute of Standards and Technology (NIST) (NBS 950, 010,
030, 200, 500, 750, and 970). The accuracy obtained for the major isotopes was better than 0.2%. 相似文献
107.
Ibrahim Iliya Zulfiqar Ali Toshiyuki Tanaka Munekazu Iinuma Miyuki Furusawa Ken‐ichi Nakaya Jin Murata Dedy Darnaedi 《Helvetica chimica acta》2002,85(8):2538-2546
Four new stilbene oligomers, gnemonols G, H, I, and J ( 1 – 4 ), were isolated from acetone extract of the root of Gnetum gnemon along with five known stilbenoids, ampelopsin E, cis‐ampelopsin E, gnetins C, D, and E. The structures were elucidated on the basis of spectroscopic evidence. 相似文献
108.
109.
We investigate experiments of continuous-variable quantum information processing based on the teleportation scheme. Quantum
teleportation, which is realized by a two-mode squeezed vacuum state and measurement-and-feedforward, is considered as an
elementary quantum circuit as well as quantum communication. By modifying ancilla states or measurement-and-feedforwards,
we can realize various quantum circuits which suffice for universal quantum computation. In order to realize the teleportation-based
computation we improve the level of squeezing, and fidelity of teleportation. With a high-fidelity teleporter we demonstrate
some advanced teleportation experiments, i.e., teleportation of a squeezed state and sequential teleportation of a coherent
state. Moreover, as an example of the teleportation-based computation, we build a QND interaction gate which is a continuous-variable
analog of a CNOT gate. A QND interaction gate is constructed only with ancillary squeezed vacuum states and measurement-and-feedforwards.
We also create continuous-variable four mode cluster type entanglement for further application, namely, one-way quantum computation. 相似文献
110.
Kentaro Furusawa Norihiko Hayazawa Satoshi Kawata 《Journal of Raman spectroscopy : JRS》2010,41(8):840-847
A two‐beam multiplexed coherent anti‐Stokes Raman scattering (CARS) microscopy setup is demonstrated by using a broadband (BB) Ti:sapphire oscillator without using any specialty fibres. A well‐defined spectral structure of the source leads to a delay‐sensitive CARS measurement in two‐colour CARS and also provides an efficient means of obtaining three‐colour CARS signals combined with the dispersion compensation of the BB pulse. Our result implies that the background suppression is limited by the onset of the spurious signals caused by the different CARS process, qualitatively differing from what is typically observed in the CARS microscopy. Copyright © 2010 John Wiley & Sons, Ltd. 相似文献