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  • 1
    Publication Date: 2015-04-28
    Description: Integrated photonics promises solutions to questions of stability, complexity, and size in quantum optics. Advances in tunable and non-planar integrated platforms, such as laser-inscribed photonics, continue to bring the realisation of quantum advantages in computation and metrology ever closer, perhaps most easily seen in multi-path interferometry. Here we demonstrate control of two-photon interference in a chip-scale 3D multi-path interferometer, showing a reduced periodicity and enhanced visibility compared to single photon measurements. Observed non-classical visibilities are widely tunable, and explained well by theoretical predictions based on classical measurements. With these predictions we extract Fisher information approaching a theoretical maximum. Our results open a path to quantum enhanced phase measurements. Scientific Reports 5 doi: 10.1038/srep09601
    Electronic ISSN: 2045-2322
    Topics: Natural Sciences in General
    Published by Springer Nature
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  • 2
    Publication Date: 2016-03-23
    Description: Article Deterministically generated single photons are useful for quantum communications, but the processes that create such light are often non-deterministic. Here, the authors enhance the single-photon output probability by multiplexing photons from four temporal modes using fibre-integrated optics. Nature Communications doi: 10.1038/ncomms10853 Authors: C. Xiong, X. Zhang, Z. Liu, M. J. Collins, A. Mahendra, L. G. Helt, M. J. Steel, D. -Y. Choi, C. J. Chae, P. H. W. Leong, B. J. Eggleton
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
    Published by Springer Nature
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  • 3
    Publication Date: 2015-12-10
    Description: We demonstrate a monolithically integrable heralded photon source in a femtosecond laser direct written glass waveguide. The generation of photon pairs with a wide wavelength separation requires a concomitant large birefringence in the normal dispersion regime. Here, by incorporation of side-stress tracks, we produce a waveguide with a birefringence of 1.64 × 10 − 4 and propagation loss as low as 0.21 dB/cm near 980 nm. We measure photon pairs with 300 nm wavelength separation at an internal generation rate exceeding 5.05 × 10 6 /s. The second order correlations indicate that the generated photon pairs are in a strongly non-classical regime.
    Print ISSN: 0003-6951
    Electronic ISSN: 1077-3118
    Topics: Physics
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  • 4
    Publication Date: 2012-01-24
    Description: Author(s): M. Liscidini, L. G. Helt, and J. E. Sipe We discuss the use of asymptotic-in and -out fields in a Hamiltonian treatment of nonlinear electromagnetic problems. Our approach allows a description of nonlinear phenomena in a number of geometries and is suitable to treat integrated photonic structures, particularly cavities. We present examples... [Phys. Rev. A 85, 013833] Published Mon Jan 23, 2012
    Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics
    Print ISSN: 1050-2947
    Electronic ISSN: 1094-1622
    Topics: Physics
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  • 5
    Publication Date: 2012-01-26
    Description: Author(s): Sergei V. Zhukovsky, Lukas G. Helt, Dongpeng Kang, Payam Abolghasem, Amr S. Helmy, and J. E. Sipe We propose a method of generating maximally-polarization-entangled states by type-II spontaneous parametric down-conversion in Bragg reflection waveguides. Analytic expressions for the group velocities of down-converted modes are used to engineer zero group-velocity mismatch at the operating point, ... [Phys. Rev. A 85, 013838] Published Wed Jan 25, 2012
    Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics
    Print ISSN: 1050-2947
    Electronic ISSN: 1094-1622
    Topics: Physics
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  • 6
    Publication Date: 2014-02-20
    Description: Author(s): Dongpeng Kang, L. G. Helt, Sergei V. Zhukovsky, Juan P. Torres, J. E. Sipe, and A. S. Helmy We propose and analyze the performance of a technique to generate mode and polarization hyperentangled photons in monolithic semiconductor waveguides using two concurrent type-II spontaneous parametric down-conversion (SPDC) processes. These two SPDC processes are achieved by waveguide engineering w... [Phys. Rev. A 89, 023833] Published Wed Feb 19, 2014
    Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics
    Print ISSN: 1050-2947
    Electronic ISSN: 1094-1622
    Topics: Physics
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  • 7
    Publication Date: 2000-03-25
    Description: The fly Drosophila melanogaster is one of the most intensively studied organisms in biology and serves as a model system for the investigation of many developmental and cellular processes common to higher eukaryotes, including humans. We have determined the nucleotide sequence of nearly all of the approximately 120-megabase euchromatic portion of the Drosophila genome using a whole-genome shotgun sequencing strategy supported by extensive clone-based sequence and a high-quality bacterial artificial chromosome physical map. Efforts are under way to close the remaining gaps; however, the sequence is of sufficient accuracy and contiguity to be declared substantially complete and to support an initial analysis of genome structure and preliminary gene annotation and interpretation. The genome encodes approximately 13,600 genes, somewhat fewer than the smaller Caenorhabditis elegans genome, but with comparable functional diversity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Adams, M D -- Celniker, S E -- Holt, R A -- Evans, C A -- Gocayne, J D -- Amanatides, P G -- Scherer, S E -- Li, P W -- Hoskins, R A -- Galle, R F -- George, R A -- Lewis, S E -- Richards, S -- Ashburner, M -- Henderson, S N -- Sutton, G G -- Wortman, J R -- Yandell, M D -- Zhang, Q -- Chen, L X -- Brandon, R C -- Rogers, Y H -- Blazej, R G -- Champe, M -- Pfeiffer, B D -- Wan, K H -- Doyle, C -- Baxter, E G -- Helt, G -- Nelson, C R -- Gabor, G L -- Abril, J F -- Agbayani, A -- An, H J -- Andrews-Pfannkoch, C -- Baldwin, D -- Ballew, R M -- Basu, A -- Baxendale, J -- Bayraktaroglu, L -- Beasley, E M -- Beeson, K Y -- Benos, P V -- Berman, B P -- Bhandari, D -- Bolshakov, S -- Borkova, D -- Botchan, M R -- Bouck, J -- Brokstein, P -- Brottier, P -- Burtis, K C -- Busam, D A -- Butler, H -- Cadieu, E -- Center, A -- Chandra, I -- Cherry, J M -- Cawley, S -- Dahlke, C -- Davenport, L B -- Davies, P -- de Pablos, B -- Delcher, A -- Deng, Z -- Mays, A D -- Dew, I -- Dietz, S M -- Dodson, K -- Doup, L E -- Downes, M -- Dugan-Rocha, S -- Dunkov, B C -- Dunn, P -- Durbin, K J -- Evangelista, C C -- Ferraz, C -- Ferriera, S -- Fleischmann, W -- Fosler, C -- Gabrielian, A E -- Garg, N S -- Gelbart, W M -- Glasser, K -- Glodek, A -- Gong, F -- Gorrell, J H -- Gu, Z -- Guan, P -- Harris, M -- Harris, N L -- Harvey, D -- Heiman, T J -- Hernandez, J R -- Houck, J -- Hostin, D -- Houston, K A -- Howland, T J -- Wei, M H -- Ibegwam, C -- Jalali, M -- Kalush, F -- Karpen, G H -- Ke, Z -- Kennison, J A -- Ketchum, K A -- Kimmel, B E -- Kodira, C D -- Kraft, C -- Kravitz, S -- Kulp, D -- Lai, Z -- Lasko, P -- Lei, Y -- Levitsky, A A -- Li, J -- Li, Z -- Liang, Y -- Lin, X -- Liu, X -- Mattei, B -- McIntosh, T C -- McLeod, M P -- McPherson, D -- Merkulov, G -- Milshina, N V -- Mobarry, C -- Morris, J -- Moshrefi, A -- Mount, S M -- Moy, M -- Murphy, B -- Murphy, L -- Muzny, D M -- Nelson, D L -- Nelson, D R -- Nelson, K A -- Nixon, K -- Nusskern, D R -- Pacleb, J M -- Palazzolo, M -- Pittman, G S -- Pan, S -- Pollard, J -- Puri, V -- Reese, M G -- Reinert, K -- Remington, K -- Saunders, R D -- Scheeler, F -- Shen, H -- Shue, B C -- Siden-Kiamos, I -- Simpson, M -- Skupski, M P -- Smith, T -- Spier, E -- Spradling, A C -- Stapleton, M -- Strong, R -- Sun, E -- Svirskas, R -- Tector, C -- Turner, R -- Venter, E -- Wang, A H -- Wang, X -- Wang, Z Y -- Wassarman, D A -- Weinstock, G M -- Weissenbach, J -- Williams, S M -- WoodageT -- Worley, K C -- Wu, D -- Yang, S -- Yao, Q A -- Ye, J -- Yeh, R F -- Zaveri, J S -- Zhan, M -- Zhang, G -- Zhao, Q -- Zheng, L -- Zheng, X H -- Zhong, F N -- Zhong, W -- Zhou, X -- Zhu, S -- Zhu, X -- Smith, H O -- Gibbs, R A -- Myers, E W -- Rubin, G M -- Venter, J C -- P50-HG00750/HG/NHGRI NIH HHS/ -- U54 HG003273/HG/NHGRI NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2000 Mar 24;287(5461):2185-95.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Celera Genomics, 45 West Gude Drive, Rockville, MD 20850, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10731132" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Transport/genetics ; Chromatin/genetics ; Cloning, Molecular ; Computational Biology ; Contig Mapping ; Cytochrome P-450 Enzyme System/genetics ; DNA Repair/genetics ; DNA Replication/genetics ; Drosophila melanogaster/*genetics/metabolism ; Euchromatin ; Gene Library ; Genes, Insect ; *Genome ; Heterochromatin/genetics ; Insect Proteins/chemistry/genetics/physiology ; Nuclear Proteins/genetics ; Protein Biosynthesis ; *Sequence Analysis, DNA ; Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
    Publication Date: 2007-05-19
    Description: Significant fractions of eukaryotic genomes give rise to RNA, much of which is unannotated and has reduced protein-coding potential. The genomic origins and the associations of human nuclear and cytosolic polyadenylated RNAs longer than 200 nucleotides (nt) and whole-cell RNAs less than 200 nt were investigated in this genome-wide study. Subcellular addresses for nucleotides present in detected RNAs were assigned, and their potential processing into short RNAs was investigated. Taken together, these observations suggest a novel role for some unannotated RNAs as primary transcripts for the production of short RNAs. Three potentially functional classes of RNAs have been identified, two of which are syntenically conserved and correlate with the expression state of protein-coding genes. These data support a highly interleaved organization of the human transcriptome.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kapranov, Philipp -- Cheng, Jill -- Dike, Sujit -- Nix, David A -- Duttagupta, Radharani -- Willingham, Aarron T -- Stadler, Peter F -- Hertel, Jana -- Hackermuller, Jorg -- Hofacker, Ivo L -- Bell, Ian -- Cheung, Evelyn -- Drenkow, Jorg -- Dumais, Erica -- Patel, Sandeep -- Helt, Gregg -- Ganesh, Madhavan -- Ghosh, Srinka -- Piccolboni, Antonio -- Sementchenko, Victor -- Tammana, Hari -- Gingeras, Thomas R -- N01-CO-12400/CO/NCI NIH HHS/ -- U01HG003147/HG/NHGRI NIH HHS/ -- New York, N.Y. -- Science. 2007 Jun 8;316(5830):1484-8. Epub 2007 May 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Affymetrix Laboratory, Affymetrix, Inc., 3420 Central Expressway, Santa Clara, CA, 95051, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17510325" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line, Tumor ; Cell Nucleus/metabolism ; Cytosol/metabolism ; Exons ; Gene Expression ; Genome ; *Genome, Human ; HeLa Cells ; Humans ; Mice ; Promoter Regions, Genetic ; RNA/*genetics/metabolism ; RNA Precursors/*genetics/metabolism ; RNA, Messenger/*genetics/*metabolism ; Synteny ; Terminator Regions, Genetic ; *Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
    Publication Date: 2005-03-26
    Description: Sites of transcription of polyadenylated and nonpolyadenylated RNAs for 10 human chromosomes were mapped at 5-base pair resolution in eight cell lines. Unannotated, nonpolyadenylated transcripts comprise the major proportion of the transcriptional output of the human genome. Of all transcribed sequences, 19.4, 43.7, and 36.9% were observed to be polyadenylated, nonpolyadenylated, and bimorphic, respectively. Half of all transcribed sequences are found only in the nucleus and for the most part are unannotated. Overall, the transcribed portions of the human genome are predominantly composed of interlaced networks of both poly A+ and poly A- annotated transcripts and unannotated transcripts of unknown function. This organization has important implications for interpreting genotype-phenotype associations, regulation of gene expression, and the definition of a gene.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cheng, Jill -- Kapranov, Philipp -- Drenkow, Jorg -- Dike, Sujit -- Brubaker, Shane -- Patel, Sandeep -- Long, Jeffrey -- Stern, David -- Tammana, Hari -- Helt, Gregg -- Sementchenko, Victor -- Piccolboni, Antonio -- Bekiranov, Stefan -- Bailey, Dione K -- Ganesh, Madhavan -- Ghosh, Srinka -- Bell, Ian -- Gerhard, Daniela S -- Gingeras, Thomas R -- New York, N.Y. -- Science. 2005 May 20;308(5725):1149-54. Epub 2005 Mar 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Affymetrix Inc., Santa Clara, CA 95051, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15790807" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line ; Cell Line, Tumor ; Cell Nucleus/metabolism ; Chromosomes, Human/*genetics ; Chromosomes, Human, Pair 13/genetics ; Chromosomes, Human, Pair 14/genetics ; Chromosomes, Human, Pair 19/genetics ; Chromosomes, Human, Pair 20/genetics ; Chromosomes, Human, Pair 21/genetics ; Chromosomes, Human, Pair 22/genetics ; Chromosomes, Human, Pair 6/genetics ; Chromosomes, Human, Pair 7/genetics ; Chromosomes, Human, X/genetics ; Chromosomes, Human, Y/genetics ; Computational Biology ; Cytosol/metabolism ; DNA, Complementary ; DNA, Intergenic ; Exons ; Female ; *Genome, Human ; Humans ; Introns ; Male ; Molecular Sequence Data ; Nucleic Acid Amplification Techniques ; Oligonucleotide Array Sequence Analysis ; Physical Chromosome Mapping ; RNA Splicing ; RNA, Messenger/*analysis ; *Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
    Publication Date: 2016-04-22
    Description: Author(s): T. Onodera, Marco Liscidini, J. E. Sipe, and L. G. Helt We investigate spontaneous four-wave mixing (SFWM) in a single-channel side-coupled integrated spaced sequence of resonators (SCISSOR). Analytic expressions for the number of photon pairs generated, as well as the biphoton wave function (joint spectral amplitude) describing the pairs, are derived an… [Phys. Rev. A 93, 043837] Published Thu Apr 21, 2016
    Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics
    Print ISSN: 1050-2947
    Electronic ISSN: 1094-1622
    Topics: Physics
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