Refereed Journal Publications

(113) "LIGO: the Laser Interferometer Gravitational-Wave Observatory", B. Abbott et al. (LIGO Scientific Collaboration), Reports on Progress in Physics, Vol. 72  076901 (2009). Abstract and paper.

(112) "Search for gravitational waves from low mass binary coalescences in the first year of LIGO's S5 data", B. Abbott et al. (LIGO Scientific Collaboration), Phys. Rev. D 79 122001 (2009). Abstract and paper.

(111) "Status of NINJA: the Numerical INJection Analysis project", L. Cadonati et al., Classical and Quantum Gravity, Vol. 26,  p. 114008 (2009). Abstract and paper.

(110) "Degeneracies in sky localization determination from a spinning coalescing binary through gravitational wave observations: a Markov-chain Monte Carlo analysis for two detectors", V Raymond, M V van der Sluys, I Mandel, V Kalogera, C Roever and N Christensen, Classical and Quantum Gravity, Vol. 26,  p. 114007 (2009). Abstract and paper.

(109) "Gravitational wave burst search in the Virgo C7 data", F. Acernese et al., Classical and Quantum Gravity, Vol. 26,  p. 085009 (2009). Abstract and paper.

(108) "All-Sky LIGO Search for Periodic Gravitational Waves in the Early Fifth-Science-Run Data", B. Abbott et al. (LIGO Scientific Collaboration), Physical Review Letters 102 111102 (2009). Abstract and paper.

(107) "Einstein@Home search for periodic gravitational waves in LIGO S4 data", B. Abbott et al. (LIGO Scientific Collaboration), Phys. Rev. D 79 022001 (2009). Abstract and paper.

(106) "First joint search for gravitational-wave bursts in LIGO and GEO 600 data", B. Abbott et al. (LIGO Scientific Collaboration), Classical and Quantum Gravity, Vol. 25, p. 245008 (2008). Abstract and paper.

(105) "Search for Gravitational-Wave Bursts from Soft Gamma Repeaters", B. Abbott et al. (LIGO Scientific Collaboration), Physical Review Letters, Vol. 101, p. 211102 (2008). Abstract and paper.

(104) "Searching for gravitational waves from Cassiopeia A with LIGO", K Wette, B J Owen, B Allen, M Ashley, J Betzwieser, N Christensen, T D Creighton, V Dergachev, I Gholami, E Goetz, R Gustafson, D Hammer, D I Jones, B Krishnan, M Landry, B Machenschalk, D E McClelland, G Mendell, C J Messenger, M A Papa, P Patel, M Pitkin, H J Pletsch, R Prix, K Riles, L Sancho de la Jordana, S M Scott, A M Sintes, M Trias, J T Whelan and G Woan. Classical and Quantum Gravity, Vol. 25, p. 235011 (2008). Abstract and paper.

(103) "Gravitational-Wave Astronomy with Inspiral Signals of Spinning Compact-Object Binaries", M. V. van der Sluys, C. Röver, A. Stroeer, V. Raymond, I. Mandel, N. Christensen, V. Kalogera, R. Meyer, and A. Vecchio. Astrophysical Journal Letters, Vol. 688, p. L61 (2008). Abstract and paper.
 
(102) "Search for gravitational waves associated with GRB 050915a using the Virgo detector", F. Acernese et al., Classical and Quantum Gravity, Vol. 25, p. 225001 (2008). Abstract and paper.

(101) "Parameter estimation of spinning binary inspirals using Markov chain Monte Carlo", Marc van der Sluys, Vivien Raymond, Ilya Mandel, Christian Röver, Nelson Christensen, Vicky Kalogera, Renate Meyer and Alberto Vecchio. Classical and Qunatum Gravity, Vol. 25, 184011 (2008). Abstract and paper.

(100) "The LSC glitch group: monitoring noise transients during the fifth LIGO science run", L. Blackburn, L. Cadonati, S. Caride, S. Caudill, S. Chatterji, N. Christensen, J. Dalrymple, S. Desai, A. Di Credico, G. Ely, J. Garofoli, L. Goggin, G. González, R. Gouaty, C. Gray, A. Gretarsson, D. Hoak, T. Isogai, E. Katsavounidis, J. Kissel, S. Klimenko, R. A. Mercer, S. Mohapatra, S. Mukherjee, F. Raab, K. Riles, P. Saulson, R. Schofield, P. Shawhan, J. Slutsky, J. R. Smith, R. Stone, C. Vorvick, M. Zanolin, N. Zotov and J. Zweizig. Classical and Quantum Gravity, Vol. 25, 184004 (2008). Abstract and paper.

(99) "Search of S3 LIGO data for gravitational wave signals from spinning black hole and neutron star binary inspirals", B. Abbott et al. (LIGO Scientific Collaboration), Physical Review D, Vol. 78, 042002 (2008). Abstract and paper.

(98) "Beating the Spin-Down Limit on Gravitational Wave Emission from the Crab Pulsar", B. Abbott et al. (LIGO Scientific Collaboration), Astrophysical Journal Letters Vol. 683, L45 (2008). Abstract and paper.

(97) "Implications for the Origin of GRB 070201 from LIGO Observations", B. Abbott et al. (LIGO Scientific Collaboration), Astrophysical Journal, Vol. 681, p. 1419 (2008). Abstract and paper.

(96) "Report on the second Mock LISA data challenge", S. Babak et al., Classical and Quantum Gravity, Vol. 25, p. 114037 (2008). Abstract and paper.

(95) "Astrophysically triggered searches for gravitational waves: status and prospects", B. Abbott et al. (LIGO Scientific Collaboration), Classical and Quantum Gravity, Vol. 25, p. 114051 (2008). Abstract and paper.

(94) "A joint search for gravitational wave bursts with AURIGA and LIGO", L. Baggio et al. and B. Abbott et al. (LIGO Scientific Collaboration), Classical and Quantum Gravity, Vol. 25, p. 095004 (2008). Abstract and paper.

(93) "Search for gravitational waves associated with 39 gamma-ray bursts using data from the second, third, and fourth LIGO runs", B. Abbott et al. (LIGO Scientific Collaboration), Phys. Rev. D 77 062004 (2008). Abstract and paper.

(92) "Search for gravitational waves from binary inspirals in S3 and S4 LIGO data", B. Abbott et al. (LIGO Scientific Collaboration), Phys. Rev. D 77 062002 (2008). Abstract and paper.

(91) "The Real-Time Distributed Control of the Virgo Interferometric Detector of Gravitational Waves", F. Acernese et al., IEEE Transactions on Nuclear Science, Vol. 55, p. 302 (2008). Abstract and paper.

(90) "Data Acquisition System of the Virgo Gravitational Waves Interferometric Detector",  F. Acernese et al., IEEE Transactions on Nuclear Science, Vol. 55, p. 225 (2008). Abstract and paper.

(89) "Detailed comparison of LIGO and Virgo inspiral pipelines in preparation for a joint search", F Beauville et al.,  Classical and Quantum Gravity, Vol. 25, p. 045001 (2008). Abstract and paper.

(88) "A comparison of methods for gravitational wave burst searches from LIGO and Virgo", F Beauville et al.  Classical and  Quantum Gravity, Vol. 25, p. 045002 (2008). Abstract and paper.

(87) "All-sky search for periodic gravitational waves in LIGO S4 data", B. Abbott et al. (LIGO Scientific Collaboration), Phys. Rev. D 77 022001 (2008). Abstract and paper.

(86) "Status of coalescing binaries search activities in Virgo", F. Acernese et al. (Virgo Collaboration), Classical and Quantum Gravity, Vol. 24, p. 5767 (2007). Abstract and paper.

(85) "Upper limit map of a background of gravitational waves", B. Abbott et al. (LIGO Scientific Collaboration), Phys. Rev. D 76 082003 (2007). Abstract and paper

(84) "Search for gravitational-wave bursts in LIGO data from the fourth science run", B. Abbott et al. (LIGO Scientific Collaboration), Classical and Quantum Gravity, Vol. 24, p.5343 (2007). Abstract and paper.

(83) "Searches for periodic gravitational waves from unknown isolated sources and Scorpius X-1: Results from the second LIGO science run", B. Abbott et al. (LIGO Scientific Collaboration), Phys. Rev. D 76 082001 (2007). Abstract and paper.

(82) "Search for gravitational wave radiation associated with the pulsating tail of the SGR 1806-20 hyperflare of 27 December 2004 using LIGO", B. Abbott et al. (LIGO Scientific Collaboration), Phys. Rev. D 76 062004 (2007). Abstract and paper.

(81) "Coherent Bayesian analysis of inspiral signals", Christian Röver, Renate Meyer, Gianluca M Guidi, Andrea Viceré and Nelson Christensen, Classical and Quantum Gravity, Vol. 24, p. S607 (2007). Abstract and paper.

(80) "Inference on white dwarf binary systems using the first round Mock LISA Data Challenges data sets", Alexander Stroeer, John Veitch, Christian Röver, Ed Bloomer, James Clark, Nelson Christensen, Martin Hendry, Chris Messenger, Renate Meyer, Matthew Pitkin, Jennifer Toher, Richard Umstätter, Alberto Vecchio and Graham Woan, Classical and Quantum Gravity, Vol. 24, p. S541 (2007). Abstract and paper.

(79) "Report on the first round of the Mock LISA Data Challenges", K A Arnaud, G Auger, S Babak, J G Baker, M J Benacquista, E Bloomer, D A Brown, J B Camp, J K Cannizzo, N Christensen, J Clark, N J Cornish, J Crowder, C Cutler, L S Finn, H Halloin, K Hayama, M Hendry, O Jeannin, A Królak, S L Larson, I Mandel, C Messenger, R Meyer, S Mohanty, R Nayak, K Numata, A Petiteau, M Pitkin, E Plagnol, E K Porter, R Prix, C Roever, A Stroeer, R Thirumalainambi, D E Thompson, J Toher, R Umstaetter, M Vallisneri, A Vecchio, J Veitch, J-Y Vinet, J T Whelan and G Woan, Classical and Quantum Gravity, Vol. 24, p. S529 (2007). Abstract and paper.

(78) "Inference on inspiral signals using LISA MLDC data", Christian Röver, Alexander Stroeer, Ed Bloomer, Nelson Christensen, James Clark, Martin Hendry, Chris Messenger, Renate Meyer, Matt Pitkin, Jennifer Toher, Richard Umstätter, Alberto Vecchio, John Veitch and Graham Woan, Classical and Quantum Gravity, Vol. 24, p. S521 (2007). Abstract and paper.

(77) "Gravitational waves by gamma-ray bursts and the Virgo detector: the case of GRB 050915a", F. Acernese et al. (Virgo Collaboration), Classical and Quantum Gravity, Vol. 24, p. S671 (2007). Abstract and paper.

(76) "Improving the timing precision for inspiral signals found by interferometric gravitational wave detectors", F. Acernese et al. (Virgo Collaboration), Classical and Quantum Gravity, Vol. 24, p. S617 (2007). Abstract and paper.

(75) "Coincidence analysis between periodic source candidates in C6 and C7 Virgo data", F. Acernese et al. (Virgo Collaboration), Classical and Quantum Gravity, Vol. 24, p. S491 (2007). Abstract and paper.

(74) "Analysis of noise lines in the Virgo C7 data", F. Acernese et al. (Virgo Collaboration), Classical and Quantum Gravity, Vol. 24, p. S433 (2007). Abstract and paper.

(73) "Data quality studies for burst analysis of Virgo data acquired during Weekly Science Runs", F. Acernese et al. (Virgo Collaboration), Classical and Quantum Gravity, Vol. 24, p. S415 (2007). Abstract and paper.

(72) "Status of Virgo detector", F. Acernese (Virgo Collaboration), Classical and Quantum Gravity, Vol. 24, p. S381 (2007). Abstract and paper.

(71) "Upper limits on gravitational wave emission from 78 radio pulsars", B. Abbott et al. (LIGO Scientific Collaboration), Phys. Rev. D 76 042001 (2007). Abstract and paper.

(70) "First cross-correlation analysis of interferometric and resonant-bar gravitational-wave data for stochastic backgrounds", B. Abbott et al. (LIGO Scientific Collaboration), Phys. Rev. D 76 022001 (2007). Abstract and paper.

(69) "Searching for a Stochastic Background of Gravitational Waves with the Laser Interferometer Gravitational-Wave Observatory", B. Abbott et al. (LIGO Scientific Collaboration), The Astrophysical Journal, 659, p. 918 (2007). Abstract and paper.

(68) "Coherent Bayesian inference on compact binary inspirals using a network of interferometric gravitational wave detectors", Christian Röver, Renate Meyer and Nelson Christensen. Phys. Rev. D 75, 062004 (2007). Abstract and paper.

(67) “Bayesian inference on compact binary inspiral gravitational radiation signals in interferometric data”, C. Röver, R. Meyer, N. Christensen, Classical and Quantum Gravity, Vol. 23, p. 4895 (2006). Abstract and paper.

(66) “ Joint LIGO and TAMA300 search for gravitational waves from inspiralling neutron star binaries”, B. Abbott et al., Phys. Rev D 73, 102002 (2006). Abstract and paper.

(65) “Benefits of joint LIGO-Virgo coincidence searches for burst and inspiral signals”, F. Beauville et al., Journal of Physics: Conference Series, Vol. 32, p. 212 (2006). Abstract and paper.

(64) “Search for gravitational-wave bursts in LIGO's third science run”, B Abbott et al. (LIGO Scientific Collaboration), Classical and Quantum Gravity, Vol. 23, p. S29 (2006). Abstract and paper.

(63) "Search for gravitational waves from binary black hole inspirals in LIGO data ", B. Abbott et al. (LIGO Scientific Collaboration), Phys. Rev. D 73, 062001 (2006). Abstract and paper.

(62) "Multiple RF Coil Nuclear Magnetic Resonance Quantum Computing", Lisa C. Siskind, Bruce E. Hammer, Nelson L. Christensen, Jeffrey Yepez, Quantum Information Processing, Vol. 4, p.433 (2005). Abstract.

(61) "Upper limits from the LIGO and TAMA detectors on the rate of gravitational-wave bursts", B. Abbott et al. (LIGO Scientific Collaboration) and T. Akutsu et al. (TAMA Collaboration), Phys. Rev. D 72, 122004 (2005). Abstract and paper.

(60) "Upper Limits on a Stochastic Background of Gravitational Waves", B. Abbott et al. (LIGO Scientific Collaboration), Phys. Rev. Lett. 95, 221101 (2005). Abstract and paper.

(59) "First all-sky upper limits from LIGO on the strength of periodic gravitational waves using the Hough transform", B. Abbott et al. (LIGO Scientific Collaboration), Phys. Rev. D 72, 102004 (2005). Abstract and paper.

(58) "Search for gravitational waves from primordial black hole binary coalescences in the galactic halo", B. Abbott et al. (LIGO Scientific Collaboration), Phys. Rev. D 72, 082002 (2005). Abstract and paper.

(57) "Search for gravitational waves from galactic and extra-galactic binary neutron stars", B. Abbott et al. (LIGO Scientific Collaboration), Phys. Rev. D 72, 082001 (2005). Abstract and paper.

(56) "Upper limits on gravitational wave bursts in LIGO's second science run", B. Abbott et al. (LIGO Scientific Collaboration), Phys. Rev. D 72, 062001 (2005). Abstract and paper.

(55) “Search for gravitational waves associated with the gamma ray burst GRB030329 using the LIGO detectors”, B. Abbott et al. (LIGO Scientific Collaboration), Phys. Rev. D 72, 042002 (2005). Abstract and paper.

(54) “A time-domain MCMC search and upper limit technique for gravitational waves of uncertain frequency from a targeted neutron star”, John Veitch, Richard Umstätter, Renate Meyer, Nelson Christensen and Graham Woan. Classical and Quantum Gravity, Vol. 22, p. S995 (2005). Abstract and paper.

(53) “LISA source confusion: identification and characterization of signals”. Richard Umstätter, Nelson Christensen, Martin Hendry, Renate Meyer, Vimal Simha, John Veitch, Sarah Vigeland and Graham Woan. Classical and Quantum Gravity, Vol. 22, p. S901 (2005). Abstract and paper.

(52) "Veto studies for LIGO inspiral triggers". Nelson Christensen (for the LIGO Scientific Collaboration), Classical and Quantum Gravity, Vol. 22, p. S1059 (2005). Abstract and paper.

(51) “A first comparison of search methods for gravitational wave bursts using LIGO and Virgo simulated data”,  F Beauville, M-A Bizouard, L Blackburn, L Bosi, P Brady, L Brocco, D Brown, D Buskulic, S Chatterji, N Christensen, A-C Clapson, S Fairhurst, D Grosjean, G Guidi, P Hello, E Katsavounidis, M Knight, A Lazzarini, F Marion, B Mours, F Ricci, A Viceré and M Zanolin (The Joint LIGO/Virgo Working Group) , Classical and Quantum Gravity, Vol. 22, p. S1293 (2005). Abstract and paper.

(50) “A first comparison between LIGO and Virgo inspiral search pipelines”,  F Beauville, M-A Bizouard, L Blackburn, L Bosi, P Brady, L Brocco, D A Brown, D Buskulic, S Chatterji, N Christensen, A-C Clapson, S Fairhurst, D Grosjean, G Guidi, P Hello, E Katsavounidis, M Knight, A Lazzarini, F Marion, B Mours, F Ricci, A Viceré and M Zanolin (The joint LIGO/Virgo working group). Classical and Quantum Gravity, Vol. 22, p. S1149 (2005). Abstract and paper.

Nuclear transparency in 90 quasielastic A(p,2p) reactions"

(43) "Metropolis-Hastings algorithm for extracting periodic gravitational wave signals from laser interferometric detector data", Nelson Christensen, Réjean J. Dupuis, Graham Woan, Renate Meyer, Physical Review D 70, 022001 (2004). Abstract and paper.

(42) "Analysis of first LIGO science data for stochastic gravitational waves", B. Abbott et al., Physical Review D 69, 122004 (2004). Abstract and paper.

(41) "Analysis of LIGO data for gravitational waves from binary neutron stars", B. Abbott, et al., Physical Review D 69, 122001, (2004). Abstract and paper.

(40) "First upper limits from LIGO on gravitational wave bursts", B. Abbott, et al., Physical Review D 69, 102001, (2004). Abstract and paper.

(39) "Setting upper limits on the strength of periodic gravitational waves from PSR J1939+2134 using the first science data from the GEO 600 and LIGO detectors," B. Abbott, et al., Physical Review D 69, 082004, (2004). Abstract and paper. 

(38) "Upper limits on the strength of periodic gravitational waves from PSR J1939+2134", B. Allen et al., Classical and Quantum Gravity, Vol. 21, p. S671 (2004). Abstract and paper.

(37) " Detector description and performance for the first coincidence observations between LIGO and GEO", Nuclear Instruments and Methods in Physics Research Section A, Volume 517, pp 154-179, B. Abbott, et al. (2004). Abstract and paper.

(36) "A Metropolis–Hastings routine for estimating parameters from compact binary inspiral events with laser interferometric gravitational radiation data." Nelson Christensen, Renate Meyer and Adam Libson. Classical and Quantum Gravity, Vol. 21, pp. 317 (2004). Abstract and paper.

(35) "Measurements of Diffusion Resonances for the Atom Optics Quantum Kicked Rotor."M E K Williams, M P Sadgrove, A J Daley, R N C Gray, S M Tan, A S Parkins, N Christensen and R Leonhardt. Journal of Optics B: Quantum and Semiclassical Optics, Vol. 6, No.(1), p. 28 (2004). Abstract and paper.

(34) "AP Physics Workshop at Carleton College" Eric Koser and Nelson Christensen, The Physics Teacher, Vol. 40, No. 6, p. 330 (2002). paper

(33) "Fast Bayesian reconstruction of chaotic dynamical systems via extended Kalman filtering" Renate Meyer and Nelson Christensen, Physical Review E, Vol. 65, p. 016206 (2002). Abstract or paper.

(32) "The Age of the Universe and the Cosmological Constant Determined from Cosmic Microwave Background Anisotropy Measurements" Lloyd Knox, Nelson Christensen and Constantinos Skordis, Astrophysical Journal Letters, Vol. 563, p. L95 (2001). Abstract or paper. See Science Magazine news story on this paper.

(31) "Medical physics: the perfect intermediate level physics class" Nelson Christensen, European Journal of Physics, Vol. 22, p. 421 (2001). Abstract or paper

(30) "Bayesian Methods for Cosmological Parameter Estimation from Cosmic Microwave Background Measurements" Nelson Christensen, Renate Meyer, Lloyd Knox, Ben Luey, Classical and Quantum Gravity, Vol. 18, p. 2677 (2001). paper

(29) "Using Markov chain Monte Carlo methods for estimating parameters with gravitational radiation data", Nelson Christensen and Renate Meyer, Physical Review D, Vol. 64, p. 022001 (2001).

(28) "Potential multiparticle entanglement measure" Alexander Wong and Nelson Christensen, Physical Review A, Vol. 63, p. 044301 (2001).

(27) "Momentum distributions for the quantum delta-kicked rotor with decoherence", A C Doherty, K M D Vant, G H Ball, N Christensen and R Leonhardt. Journal of Optics - B Quantum and Semiclassical Optics, Vol. 2, p. 605 (2000).

(26) "Bayesian reconstruction of chaotic dynamical systems", R. Meyer and N. Christensen, Physical Review E, Vol. 62, p. 3535 (2000).

(25) "Momentum distributions for the quantum d-kicked rotor with decoherence", K. Vant, G. Ball, N. Christensen. Physical Review E, Vol. 61, p. 5994 (2000).

(24) "A Numerical Investigation of the Effects of Classical Phase Space Structure on a Quantum System" 2000 G. Ball, K. Vant, N. Christensen. Physical Review E, Vol. 61, p. 1299 (2000).

(23) "A Study of Quantum Decoherence via Spontaneous Emission in a System with Kolmogorov - Arnol'd- Moser Tori" G. Ball , K. Vant, H. Ammann, N. Christensen. Journal of Optics B: Quantum and Semiclassical Optics, Vol. 1, p. 357 (1999)

(22) "The Large Momentum Transfer Reaction 12C(p,2p+n) as a New Method for Measuring Short Range NN Correlations in Nuclei" J.Aclander, J. Alster, D. Barton, G. Bunce, A. Carroll, N. Christensen, H. Courant, S. Durrant, S. Gushue, S. Heppleman, E. Kosonovsky, I. Mardor, Y. Mardor, M. Marshak, Y. Makdisi, E. Minor, I. Navon, H. Nicholson, E. Piasetzky, T. Roser, J. Russell, M. Sargsian, S. Sutton, M. Tanaka, C. White, J-Y Wu. Physics Letters B, Vol. 453, p. 211 (1999)

(21) "Experimental Evidence for the Role of Cantori as Barriers in a Quantum System" K. Vant, G. Ball, H. Ammann, N. Christensen. Physical Review E, Vol. 59, p. 2846 (1999)

(20) "The Effects of Classical Barriers in a Quantum Chaos Experiment Using Laser Cooled Atoms" N. Christensen, H. Ammann, G. Ball, K. Vant. Laser Physics, Vol. 9, p. 281 (1999)

(19) "Nuclear Transparency in Large Momentum Transfer Quasi-Elastic Scattering" I. Mardor, S. Durrant, J.Aclander, J. Alster, D. Barton, G. Bunce, A. Carroll, N. Christensen, H. Courant, , S. Gushue, S. Heppleman, E. Kosonovsky, Y. Mardor, M. Marshak, Y. Makdisi, E. Minor, I. Navon, H. Nicholson, E. Piasetzky, T. Roser, J. Russell, C.S. Sutton, M. Tanaka, C. White, J-Y Wu. Physical Review Letters, Vol. 81, p. 5085 (1998)

(18) "Measurement of Quasi-Elastic 12C(p,2p) Scattering at High Momentum Transfer" Y. Mardor, J.Aclander, J. Alster, D. Barton, G. Bunce, A. Carroll, N. Christensen, H. Courant, S. Durrant, S. Gushue, S. Heppleman, E. Kosonovsky, I. Mardor, M. Marshak, Y. Makdisi, E. Minor, I. Navon, H. Nicholson, E. Piasetzky, T. Roser, J. Russell, C. S. Sutton, M. Tanaka, C. White, J-Y Wu. Physics Letters B, Vol. 437, p. 257 (1998)

(17) "Markov Chain Monte Carlo Methods for Bayesian Gravitational Radiation Data Analysis" Nelson Christensen and Renate Meyer. Physical Review D, Vol. 58, 082001 (1998)

(16) "Experimental Observation of Dynamical Localization and Decoherence in the Atomic Delta Kicked Rotor: " H. Ammann, R. Gray, N. Christensen, I. Shvarchuck. Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 31, p.2449 (1998)

(15) "Quantum Delta Kicked Rotor: Experimental Observation of Decoherence" H. Ammann, R. Gray, I. Shvarchuck, N. Christensen. Physical Review Letters, Vol. 80, p. 4111 (1998). See also, "The World of Quantum Chaos" in Physical Review Focus, Vol. 2, story 8 http://publish.aps.org/FOCUS/v2/st8.html

(14) "Mixing Internal and External Atomic Dynamics in the Kicked Rotor" Hubert Ammann and Nelson Christensen. Physical Review E, Vol. 57, p. 354 - 358 (1998)

(13) "Coupling Scintillation Light Into Optical Fibre for Use in a Combined PET-MRI Scanner" G.M. Haak, N.L. Christensen, B.E. Hammer, Nuclear Instruments and Methods in Physics Research A, Vol. 399, p. 455-462 (1997).

(12) "Experimental studies on the angular distribution of scintillation light from small BGO crystals" G.M. Haak, N.L. Christensen, B.E. Hammer, Nuclear Instruments and Method in Physics Research A, Vol. 390, p. 191-197 (1997).

(11) "Delta kick cooling: A New Method for Cooling Atoms" Hubert Ammann and Nelson Christensen. Physical Review Letters, Vol. 78, p. 2088-2091 (1997).

(10) "Optimal detection strategies for measuring the stochastic gravitational radiation background with laser interferometric antennas" N.L. Christensen, Physical Review D, Vol. 55, p. 448-454 (1997).

(9) "MRI-PET Scanner Design: The Effect of Magnetic Fields on the Intrinsic Resolution of PET Scanners" R. R. Raylman, B.E. Hammer, N.L. Christensen, IEEE Transactions on Nuclear Science, Vol 43, No. 4, p. 2406-2412 (1996)

(8) "The Effect of Resonant Dispersion and Gain on Modulation Instability" S.G. Murdoch, J.D. Harvey, N.L. Christensen, Optics Communication, Vol. 121, p. 13-18 (1995).

(7) "Use of Strong Magnetic Fields to Limit Positron Range in Matter" B. E. Hammer, N. L. Christensen IEEE Transactions on Nuclear Science, Vol. 42, No. 4, p. 1371-1376 (1995)

(6) "A Technique for Positron Emission Tomography Use in Magnetic Fields with Photomultipliers and Light-Guides" N. Christensen, B. Hammer, K. Fetterely, and B. Heil Physics of Medicine and Biology, Vol. 40, p.691-697 (1995)

(5) "Use of a Magnetic Field to Increase Spatial Resolution of Positron Emission Tomography" B. Hammer, N. Christensen, and B. Heil Medical Physics. Vol. 21, No. 12, p. 1917-1920 (1994). See also: abstract with figure in Year Book of Nuclear Medicine, Mosby-Year Book, Inc., (1996). Abstract and paper.

(4) "Noise Characteristics of Cross-Phase Modulation Instability Light" N. Christensen, R. Leonhardt, J.D. Harvey, Optics Communication. Vol. 101, p. 205 (1993).

(3) "Noise Characteristics of a Mode Locked Argon Laser" J. D. Harvey, N. Christensen, J.M. Dudley, and D.B. Hirst, Optics Communication. Vol. 97, p. 219 (1993).

(2) "Measuring the Stochastic Gravitational Radiation Background with Laser Interferometric Antennas" N. Christensen, Physical Review D, Vol. 46, p. 5250 (1992).  paper

(1) "A Prototype Michelson Interferometer with Fabry-Perot Transducers" D. Shoemaker, P. Fritschel, J. Giame, N. Christensen, and R. Weiss, Applied Optics, Vol. 30, No. 22, p. 3133 (1991).