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Jan Harms


janosch314@gmail.com

Books

2010
Fausto Acernese, Rosario De Rosa, Riccardo De Salvo, Fabio Garufi, Gerardo Giordano, Jan Harms, Vuk Mandic, Angelo Sajeva, Thomas Trancynger, Fabrizio Barone (2010) Edited by:Z Marka, S Marka.  
Abstract:
Notes: Times Cited: 5 012036 8th Edoardo Amaldi Conference on Gravitational Waves JUN 21-26, 2009 Columbia Univ, New York, NY

Journal articles

2013
2012
2011
2010
2009
2008
2007
2006
2005
2004
R Schnabel, J Harms, K A Strain, K Danzmann (2004)  Squeezed light for the interferometric detection of high-frequency gravitational waves   Classical and Quantum Gravity 21: 5.  
Abstract:
Notes: Times Cited: 16 SI 5th Edoardo Amaldi Conference on Gravitational Waves JUL 06-11, 2003 Tirrenia, ITALY
B Willke, P Aufmuth, C Aulbert, S Babak, R Balasubramanian, B W Barr, S Berukoff, G Cagnoli, C A Cantley, M M Casey, S Chelkowski, D Churches, C N Colacino, D R M Crooks, C Cutler, K Danzmann, R Davies, R J Dupuis, E Elliffe, C Fallnich, A Freise, S Gossler, A Grant, H Grote, S Grunewald, J Harms, G Heinzel, I S Heng, A Hepstonstall, M Heurs, M Hewitson, S Hild, J Hough, R Ingley, Y Itoh, O Jennrich, R Jones, S H Hutter, K Kawabe, C Killow, K Kotter, B Krishnan, V Leonhardt, H Luck, B Machenschalk, M Malec, R A Mercer, C Messenger, S Mohanty, K Mossavi, S Mukherjee, S Nagano, G P Newton, M A Papa, M Perreur-Lloyd, M Pitkin, M V Plissi, V Quetschke, V Re, S Reid, L Ribichini, D I Robertson, N A Robertson, S Rowan, A Rudiger, B S Sathyaprakash, R Schilling, R Schnabel, B F Schutz, F Seifert, A M Sintes, J R Smith, P H Sneddon, K A Strain, I Taylor, C I Torrie, C Ungarelli, A Vecchio, H Ward, U Weiland, H Welling, P Williams, W Winkler, G Woan, I Zawischa (2004)  Status of GEO 600   Classical and Quantum Gravity 21: 5.  
Abstract: The GEO 600 laser interferometer with 600 m armlength is currently being commissioned as a part of a worldwide network of gravitational wave detectors. Due to the use of advanced technologies such as signal recycling and multiple pendulum suspensions with a monolithic last stage the anticipated sensitivity of GEO 600 is close to the initial sensitivity of km baseline detectors. This paper describes the status of the detector as of November 2003 with special emphasis on its performance during the first serious data-taking periods and on the experimental challenges encountered during the commissioning of the dual-recycled detector.
Notes: Times Cited: 66 SI 5th Edoardo Amaldi Conference on Gravitational Waves JUL 06-11, 2003 Tirrenia, ITALY
2003
J Harms, Y B Chen, S Chelkowski, A Franzen, H Vahlbruch, K Danzmann, R Schnabel (2003)  Squeezed-input, optical-spring, signal-recycled gravitational-wave detectors   Physical Review D 68: 4.  
Abstract: We theoretically analyze the quantum noise of signal-recycled laser interferometric gravitational-wave detectors with additional input and output optics, namely, frequency-dependent squeezing of the vacuum state of light entering the dark port and frequency-dependent homodyne detection. We combine the work of Buonanno and Chen on the quantum noise of signal-recycled interferometers with ordinary input and output optics, and the work of Kimble on frequency-dependent input and output optics with conventional interferometers. Analytical formulas for the optimal input and output frequency dependencies are obtained. It is shown that injecting squeezed light with the optimal frequency-dependent squeezing angle into the dark port yields an improvement in the noise spectral density by a factor of e(-2r) (in power) over the entire squeezing bandwidth, where r is the squeezing parameter. It is further shown that a frequency-dependent (variational) homodyne readout leads to an additional increase in sensitivity which is significant in the wings of the doubly resonant structure. The optimal variational input squeezing in the case of an ordinary output homodyne detection is shown to be realizable by applying two optical filters on a frequency-independent squeezed vacuum. Throughout this paper, we take as an example the signal-recycled topology currently being completed at the GEO 600 site. However, theoretical results obtained here are also applicable to the proposed topology of the Advanced LIGO.
Notes: Times Cited: 51
M Hewitson, P Aufmuth, C Aulbert, S Babak, R Balasubramanian, B W Barr, S Berukoff, G Cagnoli, C A Cantley, M M Casey, S Chelkowski, D Churches, C N Colacino, D R M Crooks, C Cutler, K Danzmann, R Davies, R Dupuis, E Elliffe, C Falinich, A Freise, S Gossler, A Grant, H Grote, S Grunewald, J Harms, G Heinzel, S Heng, A Hepstonstall, M Heurs, J Hough, Y Itoh, O Jennrich, R Jones, S Hutter, K Kawabe, C Killow, K Kotter, B Krishnan, V Leonhardt, H Luck, B Machenschalk, M Malec, K Mossavi, S Mohanty, S Mukherjee, S Nagano, G P Newton, M A Papa, M Perreur-Lloyd, M Pitkin, M V Plissi, V Quetschke, S Reid, L Ribichini, D I Robertson, N A Robertson, S Rowan, A Rudiger, B S Sathyaprakash, R Schilling, R Schnabel, B F Schutz, F Seifert, A M Sintes, J Smith, P Sneddon, K A Strain, I Tayor, C I Torrie, A Vecchio, H Ward, U Weiland, H Welling, P Williams, B Willke, W Winkler, G Woan, I Zawischa (2003)  A Report on the Status of the GEO 600 Gravitational Wave Detector   Classical and Quantum Gravity 20: 17.  
Abstract: GEO 600 is an interferometric gravitational wave detector with 600 m arms, which will employ a novel, dual-recycled optical scheme allowing its optical response to be tuned over a range of frequencies (from similar to100 Hz to a few kHz). Additional advanced technologies, such as multiple pendulum suspensions with monolithic bottom stages, make the anticipated sensitivity of GEO 600 comparable to initial detectors with kilometre arm lengths. This paper discusses briefly the design of GEO, reports on the status of the detector up to the end of 2002 with particular focus on participation in coincident engineering and science runs with LIGO detectors. The plans leading to a fully optimized detector and participation in future coincident science runs are briefly outlined.
Notes: Times Cited: 9 SI 7th Gravitational Wave Data Analysis Workshop (GWDAW2002) DEC 17-19, 2002 INT INST ADV STUDIES, KYOTO, JAPAN
A M Sintes, P Aufmuth, C Aulbert, S Babak, R Balasubramanian, B W Barr, S Berukoff, S Borger, G Cagnoli, C A Cantley, M M Casey, S Chelkowski, D Churches, C N Colacino, D R M Crooks, C Cutler, K Danzmann, R Davies, R Dupuis, E Elliffe, C Fallnich, A Freise, S Gossler, A Grant, H Grote, S Grunewald, J Harms, G Heinzel, I S Heng, A Hepstonstall, M Heurs, M Hewitson, J Hough, R Ingley, Y Itoh, O Jennrich, R Jones, S Hutter, K Kawabe, C Killow, K Kotter, B Krishnan, V Leonhardt, H Luck, B Machenschalk, M Malec, C Messenger, K Mossavi, S Mohanty, S Mukherjee, S Nagan, G P Newton, M A Papa, M Perreur-Lloyd, M Pitkin, M V Plissi, V Quetschke, S Reid, L Ribichini, D I Robertson, N A Robertson, S Rowan, A Rudiger, B S Sathyaprakash, R Schilling, R Schnabel, B F Schutz, F Seifert, J Smith, P Sneddon, K A Strain, I Taylor, C I Torrie, A Vecchio, H Ward, U Weiland, H Welling, P Williams, B Willke, W Winkler, G Woan, I Zawischa (2003)  Detector characterization in GEO 600   Classical and Quantum Gravity 20: 17.  
Abstract: The GEO 600 interferometric gravitational wave detector conducted its first science run (S1) from 23 August 2002 to 9 September 2002. The GEO 600 data acquisition system is described together with some software tools developed for doing detector characterization and data analysis. Detector characterization results are also being presented.
Notes: Times Cited: 0 SI 7th Gravitational Wave Data Analysis Workshop (GWDAW2002) DEC 17-19, 2002 INT INST ADV STUDIES, KYOTO, JAPAN

Book chapters

2004
K A Strain, B Allen, P Aufmuth, C Aulbert, S Babak, R Balasubramanian, B W Barr, S Berukoff, A Bunkowski, G Cagnoli, C A Cantley, M M Casey, S Chelkowski, D Churches, T Cokelaer, C N Colacino, D R M Crooks, C Cutler, K Danzmann, R Davies, R J Dupuis, E Elliffe, C Fallnich, A Franzen, A Freise, S Gossler, A Grant, H Grote, S Grunewald, J Harms, G Heinzel, I S Heng, A Hepstonstall, M Heurs, M Hewitson, S Hild, J Hough, Y Itoh, R Jones, S H Huttner, K Kawabe, C Killow, K Kotter, B Krishnan, V Leonhardt, H Luck, B Machenschalk, M Malec, R A Mercer, C Messenger, S Mohanty, K Mossavi, S Mukherjee, P Murray, S Nagano, G P Newton, M A Papa, M Perreur-Lloyd, M Pitkin, M V Plissi, V Quetschke, V Re, S Reid, L Ribichini, D I Robertson, N A Robertson, J D Romano, S Rowan, A Rudiger, B S Sathyaprakash, R Schilling, R Schnabel, B F Schutz, F Seifert, A M Sintes, J R Smith, P H Sneddon, I Taylor, R Taylor, A Thuring, C Ungarelli, H Vahlbruch, A Vecchio, J Veitch, H Ward, U Weiland, H Welling, P Williams, B Willke, W Winkler, G Woan, I Zawischa (2004) In: The status of GEO 600 Edited by:J Hough, G H Sanders. 25-36  
Abstract: The GEO 600 laser interferometer with 600 m armlength is part of a worldwide network of gravitational wave detectors. GEO 600 is unique in having advanced multiple pendulum suspensions with a monolithic last stage and in employing a signal recycled optical design. This paper describes the recent commissioning of the interferometer and its operation in signal recycled mode.
Notes: Times Cited: 5 Conference on Gravitational Wave and Particle Astrophysics Detectors JUN 23-24, 2004 Glasgow, SCOTLAND SPIE

PhD theses

2006
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