EXC 201:  QUEST - Centre for Quantum Engineering and Space-Time Research

Final Report Abstract

During its fife years of funding, the Cluster of Excellence “Centre of Quantum Engineering and Space-Time Research” (QUEST) changed the research landscape of Leibniz Universität Hannover in a sustainable way with large impact on associated partners. QUEST researchers developed and exploited metrology-optimized quantum systems for space-time research to an unprecedented level. With innovative advances in the control of matter with laser light, the field of quantum engineering developed within the cluster to a highly sophisticated level, allowing the exploitation of quantum degrees-of-freedom for use in precision quantum metrology, tests of fundamental physics, and for novel technological applications. QUEST researchers boosted the progress towards the realisation of new quantum sensors functioning at, and beyond, the standard quantum limit, to carry out space-time research in the next generation of gravitational wave detectors on Earth and in space, relativistic geodesy, and for the design of atomic clocks and advanced atom interferometers for inertial sensing. In addition, essential fundamental experiments, including testing the variation of fundamental constants and direct tests of the Einstein equivalence principle were conducted within QUEST, which were only possible due to the interdisciplinary collaboration of scientists from atomic, molecular, and condensed-matter physics, as well as, geodesy, mathematics, general relativity, and fundamental string theory. To face these challenges, the cluster fostered the cooperation of a wide range of top-level partner institutions linked via QUEST to key institutes of physics, geodesy, and mathematics at Leibniz Universität Hannover. The university recognized the cluster’s significance by selecting “Quantum Optics and Gravitational Physics” as one of its main research nuclei. Future interdisciplinary collaborations among QUEST researchers will be focused in a newly built research facility, the Hannover Institute of Technology (HITec), opening in 2016. HITec will provide necessary new infrastructure for QUEST researchers, including a number of state-of-the-art laboratories and large equipment facilities. Leibniz Universität Hannover established a QUEST Leibniz Research School, with powers and responsibilities equivalent to a faculty, to strengthen QUEST research and to establish an optimal governance structure for this interfaculty research institution. Due to the combination of a fruitful scientific environment, the guidance of the QUEST Research School, the contemporary facilities within HITec, and the passion of all participating QUEST members, a high-profile academic centre has been established at Leibniz Universität Hannover, making it a leading location for cutting-edge space-time research and quantum engineering.

Link to the final report

http://dx.doi.org/10.2314/GBV:88299784X

Publications

• Einstein gravitational wave Telescope – Conceptual Design Study
  Abernathy
  
• “Wilson lines and Chern-Simons flux in explicit heterotic Calabi-Yau compactifications“, JHEP
  F. Apruzzi, F. F. Gautason, S. Parameswaran and M. Zagermann
  
• e2.motion – Earth System Mass Transport Mission (Square) – Concept for a Next Generation Gravity Field Mission – Final Report of Project “Satellite Gravimetry of the Next Generation (NGGM-D)”, DGK Reihe B, Nr. 318, München 2014; ISBN 978-3-7696-8597-8; 200 S.
  GGM-D Team (ed.) with contributions by Baldesarra M., Brieden P., Danzmann K., Daras I., Doll B., Feili D., Flechtner F., Flury J., Gruber T., Heinzel G., Iran Pour S., Kusche J., Langemann M., Löcher A., Müller J., Müller V., Murböck M., Naeimi M., Pail R., Raimondo J. C., Reiche J., Reubelt T., Sheard B., Sneeuw N., Wang X.
  
• Realtime phase-front detector for heterodyne interferometers. Applied Optics, Volume 46, Issue 21, page 4541–4548, 2007
  Cervantes, Felipe Guzman; Heinzel, Gerhard; Marin, Antonio F. Garcia; Wand, Vinzenz; Steier, Frank; Jennrich, Oliver; Danzmann, Karsten
  
• "Brillouin scattering spectra in high-power single-frequency ytterbium doped fiber amplifiers," Opt. Express 16 (20), 15970-15979 (2008)
  Matthias Hildebrandt, Sebastian Büsche, Peter Weßels, Maik Frede, and Dietmar Kracht
  
• "Stretched-pulse operation of a thulium-doped fiber laser," Opt. Express 16, 20471-20476 (2008)
  F. Haxsen, A. Ruehl, M. Engelbrecht, D. Wandt, U. Morgner, and D. Kracht
  
• Absolute frequency measurement of the magnesium intercombination transition 1S0 → 3P1 ; Physical Review A 78 033830 (2008)
  Friebe, J.; Pape, A.; Riedmann, M.; Moldenhauer, K.; Mehlstäuber, T.; Rehbein, N.; Lisdat, C.; Rasel, E. M.; Ertmer, W.; Schnatz, H.; Lipphardt, B.; Grosche, G
  
• An optical lattice clock with spin-polarized 87Sr atoms; Eur. Phys. J. D 48, 11–17 (2008)
  Baillard, X.; Fouché , M.; Le Targat, R.; Westergaard, P.; Lecallier, A.; Chapelet, F.; Abgrall, M.; Rovera, G.; Laurent, P.; Rosenbusch, P.; Bize, S.; Santarelli, G.; Clairon, A.; Lemonde, P.; Grosche, G.; Lipphardt, B.; Schnatz, H.
  
• Complete analytic solution of the geodesic equation in Schwarzschild-(anti) de Sitter space-times, Phys. Rev. Lett. 100, 171101 (2008)
  E. Hackmann and C. Lämmerzahl
  
• Geodesy and Relativity. Journal of Geodesy, JoG, Vol. 82, No. 3, 133-145, 2008
  Müller, J., Soffel, M., Klioner, S.
  
• Gravito-Magnetism and LLR. Physical Review D 78, 024033, 2008
  Soffel, M., Klioner, S, Müller, J., Biskupek, L.
  
• LISA, the laser interferometer space antenna, requires the ultimate in lasers, clocks, and drag-free control
 Lasers, Clocks and Drag-Free Control: Exploration of Relativistic, Volume 349, Issue , page 427–455, 2008
  Ruediger, Albrecht; Heinzel, Gerhard; Troebs, Michael; Lammerzahl, C; Turyshev, SG
  
• Optical frequency synthesis and measurement using fibre-based femtosecond lasers; Eur. Phys. J. D 48, 27- 33 (2008)
  Grosche, G.; Lipphardt, B.; Schnatz, H.
  
• Space-time fluctuations and the Equivalence Principle, Class. Quantum Grav. 25, 105012 (2008)
  E. Göklü and C. Lämmerzahl
  
• "Stabilization and power scaling of cladding pumped Er:Yb-codoped fiber amplifier via auxiliary signal at 1064 nm," Opt. Express 17 (20), 18304-18311 (2009)
  Vincent Kuhn, Peter Weßels, Jörg Neumann, and Dietmar Kracht
  
• "Sub-100 fs pulses from a low repetition rate Yb-doped fiber laser," Opt. Express 17, 5731-5735 (2009)
  H. Sayinc, D. Mortag, D. Wandt, J. Neumann, and D. Kracht
  
• (2009): Evaluation of the clock stability of geodetic GPS receivers connected to an external oscillator, Proceedings of the Institute of Navigation (ION) GNSS 2009, Savannah, GA, USA, 22-25 September 2009, pp. 3317-3328
  Weinbach, U., Schön, S.
  
• Collisional Losses, Decoherence, and Frequency Shifts in Optical Lattice Clocks with Bosons Phys. Rev. Lett. 103, 090801 (2009)
  C. Lisdat, J. S. R. Vellore Winfred, T. Middelmann, F. Riehle, U. Sterr
  
• Interrogation laser for a strontium lattice clock; IEEE Trans. Instrum. Meas. Vol. IM-58, pp. 1252-1257, 2009
  Legero, T.; Lisdat, C.; Vellore Winfred, J. S. R.; Schnatz, H.; Grosche, G.; Riehle, F.; Sterr, U.
  
• Multiresonant spinor dynamics in a Bose-Einstein condensate, Phys. Rev. Lett. 103, 195302 (2009)
  C. Klempt, O. Topic, G. Gebreyesus, M. Scherer, T. Henninger, P. Hyllus, W. Ertmer, L. Santos, J. J. Arlt
  
• Present rate of uplift in Fennoscandia from GRACE and absolute gravimetry. Tectonophysics, Vol. 474, p. 69-77, 2009
  Steffen, H., Gitlein, O., Denker, H., Müller, J., Timmen, L.
  
• Reaching the quantum limit in a fountain clock using a microwave oscillator phase locked to an ultrastable laser. Physical Review A 79, 031803(R) (2009)
  S. Weyers, B. Lipphardt, and H. Schnatz
  
• The stability of an optical clock laser transferred to the interrogation oscillator for a Cs fountain, IEEE Trans. Instrum. Meas. Vol. IM-58, pp. 1258-1262, 2009
  B. Lipphardt, G. Grosche, U. Sterr, Chr. Tamm, S. Weyers, and H. Schnatz
  
• Thermal coupling within LTP dynamics control loop
 Journal of Physics: Conference Series, Volume 154, Issue , page 012004 (6 pp.)–012004 (6 pp.), 2009
  Nofrarias, M.; Marin, A.F.G.; Heinzel, G.; Hewitson, M.; Lobo, A.; Sanjuan, J.; Ramos-Castro, J.; Danzmann, K.
  
• Universal oscillations in counting statistics, PNAS 106, 10116 (2009)
  C. Flindt, C. Fricke, F. Hohls, T. Novotny, K. Netocny, T. Brandes, R.J. Haug
  
• “Optical frequency transfer via 146 km fiber link with 10-19 relative accuracy”, Opt. Lett. 34, 2270, 2009
  G. Grosche, O. Terra, K. Predehl, R. Holzwarth, B. Lipphardt, F. Vogt, U. Sterr, and H. Schnatz
  
• “Phase-coherent comparison of two optical frequency standards over 146 km using a telecommunication fiber link” Appl. Phys. B97, 541-551, 2009
  O. Terra, G. Grosche, K. Predehl, R. Holzwarth, Thomas Legero, Uwe Sterr, B. Lipphardt, and H. Schnatz
  
• “Ultrastable lasers: new developments and applications“ Proceedings Vol. 7431; Time and Frequency Metrology II, Tetsuya Ido; Derryck T. Reid, Editors, 74310A; Date: 25 August 2009
  U. Sterr; T. Legero; T. Kessler; H. Schnatz; G. Grosche; O. Terra; F. Riehle
  
• "Compact diode stack end pumped Nd:YAG amplifier using core doped ceramics," Appl. Opt. 49, 811-816 (2010)
  Thomas Denis, Sven Hahn, Sandra Mebben, Ralf Wilhelm, Christian Kolleck, Jörg Neumann, and Dietmar Kracht
  
• "Pulse characteristics of a passively mode-locked thulium fiber laser with positive and negative cavity dispersion," Opt. Express 18, 18981-18988 (2010)
  F. Haxsen, D. Wandt, U. Morgner, J. Neumann, and D. Kracht
  
• "Pulse energy of 151 nJ from ultrafast thulium-doped chirped-pulse fiber amplifier," Opt. Lett. 35, 2991-2993 (2010)
  F. Haxsen, D. Wandt, U. Morgner, J. Neumann, and D. Kracht
  
• "Suppression of parasitic oscillations in a core-doped ceramic Nd:YAG laser by Sm:YAG cladding," Opt. Express 18, 13094-13101 (2010)
  Rafael Huß, Ralf Wilhelm, Christian Kolleck, Jörg Neumann, and Dietmar Kracht
  
• Deep phase modulation interferometry
. Optics Express, Volume 18, Issue 18, page 19076– 19086, 2010
  Heinzel, Gerhard; Cervantes, Felipe Guzman; Marin, Antonio F. Garcia; Kullmann, Joachim; Feng, Wang; Danzmann, Karsten
  
• EOM sideband phase characteristics for the spaceborne gravitational wave detector LISA Applied Physics B-Lasers and Optics, Volume 98, Issue 1, page 33–39, 2010
  Barke, S.; Troebs, M.; Sheard, B.; Heinzel, G.; Danzmann, K.
  
• Excitation of the isomeric 229mTh nuclear state via an electronic bridge process in 229Th+, Phys. Rev. Lett. 105, 182501 (2010)
  S. G. Porsev, V. V. Flambaum, E. Peik, Chr. Tamm
  
• Hyper-Ramsey Spectroscopy of Optical Clock Transitions, Phys. Rev. A 81, 011804(R) (2010)
  V. I. Yudin, A. V. Taichenachev, C. W. Oates, Z. W. Barber, N. D. Lemke, A. D. Ludlow, U. Sterr, C. Lisdat, F. Riehle
  
• Interaction induced spin-polarization in quantum dots, Phys. Rev. Lett. 105, 046802 (2010)
  M.C. Rogge, E. Räsänen, R.J. Haug
  
• Interlayer superfluidity in bilayer systems of fermionic polar molecules, Phys. Rev. Lett. 105, 215302 (2010)
  A. Pikovski, M. Klawunn, G.V. Shlyapnikov, and L. Santos
  
• LQG control of an optical squeezer, Proceedings of the American Control Conference (2010) 2730-2735
  S. Z. Sayed Hassen, I. R. Petersen, E. Huntington, M. Heurs, M. R. James
  
• Lunar laser ranging test of the Nordtvedt parameter and a possible variation of the gravitational constant. Astronomy and Astrophysics, Vol. 522, No. L5, 2010
  Hofmann, F., Müller, J., Biskupek, L.
  
• Mobilities and scattering times in decoupled graphene monolayers, Phys. Rev. B 81, 121403(R) (2010)
  H. Schmidt, T. Lüdtke, P. Barthold, R.J. Haug
  
• On Classical de Sitter Vacua in String Theory“, Fortsch. Phys. 58 (2010) 906
  T. Wrase and M. Zagermann
  
• Orbit Design and Optimization for the Gravitational Wave detection of LISA., Gravitation and Astrophysics, page 78–83, 2010

  Xia, Y.; Li, G.; Luo, Y.; Yi, Z.; Heinzel, G.; Ruediger, A.; Zhou, ZB; Yeh, HC; Hsu, JP
  
• Parametric amplification of vacuum fluctuations in a spinor condensate, Phys. Rev. Lett. 104, 195303 (2010)
  C. Klempt, O. Topic, G. Gebreyesus, M. Scherer, T. Henninger, P. Hyllus, W. Ertmer, L. Santos, J. J. Arlt
  
• Science 328, 1540 (2010).
  T. van Zoest et al.
  
• Spontaneous breaking of spatial and spin symmetry in spinor condensates, Phys. Rev. Lett. 105, 135302 (2010)
  M. Scherer, B. Lücke, G. Gebreyesus, O. Topic, F. Deuretzbacher, W. Ertmer, L. Santos, J. J. Arlt, C. Klempt
  
• Tuning the thermal expansion properties of optical reference cavities with fused silica mirrors, J. Opt. Soc. Am. B 27, 914-919 (2010)
  T. Legero, T. Kessler, and U. Sterr
  
• “Development of a Pulsed UV Laser System for Laser-Desorption Mass Spectrometry on Mars”, International Conference on Space Optics (ICSO) 2010, 4 - 8 October 2010, Rhodes, Greece
  C. Kolleck, M. Ernst, T. Hülsenbusch, T. Lang, R. Marwah, S. Mebben, M. Priehs, D. Kracht, J. Neumann
  
• “Long-distance remote characterization of ultrastable lasers via commercial telecommunication fiber network”, Opt. Express 18, 21477-21483 (2010)
  Andre Pape, Osama Terra, Jan Friebe, Matthias Riedmann, Temmo Wübbena, Ernst-Maria Rasel, Katharina Predehl, Thomas Legero, Burghard Lipphardt, Harald Schnatz, Gesine Grosche
  
• “Moduli Stabilization and Cosmology of Type IIB on SU(2)-Structure Orientifolds“, JHEP 1004 (2010) 011
  C. Caviezel, T. Wrase and M. Zagermann
  
• “Phase-coherent frequency comparison of optical clocks using a telecommunication fiber link”; IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 57,175-181, 2010
  H. Schnatz, W. Ertmer, T. Feldmann, J. Friebe, G. Grosche, T. W. Hänsch, R. Holzwarth, T. Legero, B. Lipphardt, Z. H. Lu, A. Pape, K. Predehl, E.-M. Rasel, M. Riedmann, U. Sterr, O. Terra, Th. Udem, L. J. Wang, and T. Wübbena
  
• “Smeared versus localised sources in flux compactifications“, JHEP 1012 (2010) 043
  J. Blaback, U. H. Danielsson, D. Junghans, T. Van Riet, T. Wrase and M. Zagermann
  
• "A gravitational wave observatory operating beyond the quantum shot-noise limit", Nature Physics 7, 962 (2011)
  LIGO Scientific Collaboration (J. Abadie et al.)
  
• "Beam quality and noise properties of coherently combined ytterbium doped single frequency fiber amplifiers," Opt. Express 19, 19600-19606 (2011)
  Henrik Tünnermann, Jan Hendrik Pöld, Jörg Neumann, Dietmar Kracht, Benno Willke, and Peter Weßels
  
• "Er-doped photonic crystal fiber amplifier with 70 W of output power," Optics Lett. 36, 3030-3032 (2011)
  Vincent Kuhn, Dietmar Kracht, Jörg Neumann, and Peter Weßels
  
• "Picosecond all-fiber cascaded Raman shifter pumped by an amplified gain switched laser diode," Opt. Express 19, 25918-25924 (2011)
  H. Sayinc, K. Hausmann, U. Morgner, J. Neumann, and D. Kracht
  
• (2011): GNSS receiver clock modeling when using high-precision oscillators and its impact on PPP, J. Adv. Space Res., 47(2):229-238
  Weinbach, U., Schön, S.
  
• (2011): On the temporal and spatial stochastic behaviour of high-frequency slant tropospheric delays - Results from simulations and real GNSS data, , J. Adv. Space Res., Special Issue on GNSS, 47(10): 1681-1690
  Vennebusch M., Schön, S., Weinbach U.
  
• A scientific case study of an advanced LISA mission. Classical and Quantum Gravity, Volume 28, Issue 9, article 094012, 2011
  Gong, Xuefei; Xu, Shengnian; Bai, Shan; Cao, Zhoujian; Chen, Gerui; Chen, Yanbei; He, Xiaokai; Heinzel, Gerhard; Lau, Yun-Kau; Liu, Chenzhou; Luo, Jun; Luo, Ziren; Paton, Antonio Pulido; Ruediger, Albrecht; Shao, Mingxue; Spurzem, Rainer; Wang, Yan; Xu, Peng; Yeh, Hsien-Chi; Yuan, Yefei; Zhou, Zebing
  
• A Single Laser System for Ground State Cooling of 25Mg+, Appl. Phys. B 104, 583–590 (2011)
  Hemmerling, F. Gebert, Y. Wan, D. Nigg, I. V. Sherstov, and P. O. Schmidt
  
• Auxiliary functions of the LISA laser link: ranging, clock noise transfer and data commu- nication Classical and Quantum Gravity, Volume 28, Issue 9, article 094008, 2011
  Heinzel, Gerhard; Esteban, Juan Jose; Barke, Simon; Otto, Markus; Wang, Yan; Garcia, Antonio F.; Danzmann, Karsten
  
• Controlling the quantum stereodynamics of ultracold bimolecular reactions, Nature Physics 7, 502 (2011)
  M. H. G. de Miranda, A. Chotia, B. Neyenhuis, D. Wang, G. Quemener, S. Ospelkaus, J. L. Bohn, J. Ye, D. S. Jin
  
• Dipolar stabilization of an attractive Bose gas in a one-dimensional lattice, Phys. Rev. A 84, 053601 (2011)
  S. Müller, J. Billy, E. A. L. Henn, H. Kadau, A. Griesmaier, M. Jona-Lasinio, L. Santos, and T. Pfau
  
• Dissipative Optomechanics in a Michelson-Sagnac Interferometer, Phys. Rev. Lett. 107, 213604 (2011)
  André Xuereb, Roman Schnabel, Klemens Hammerer
  
• Experimental unconditional preparation and detection of a continuous bound entangled state of light, Phys. Rev. Lett. 107, 240503 (2011)
  J. DiGuglielmo, A. Samblowski, B. Hage, C. Pineda, J. Eisert, and R. Schnabel
  
• Extended coherence time on the clock transition of optically trapped Rubidium, Phys. Rev. Lett. 106, 240801 (2011)
  G. Kleine Büning, J. Will, W. Ertmer, E. Rasel, J. Arlt, C. Klempt, F. Ramirez- Martinez, F. Piéchon, P. Rosenbusch
  
• Field-induced phase transitions of repulsive spin-1 bosons in optical lattices, Phys. Rev. Lett. 106, 105302 (2011)
  K. Rodríguez, A. Argüelles, A. K. Kolezhuk, L. Santos, and T. Vekua
  
• Fundamental Frontiers of Quantum Science and Technology, Procedia Computer Science 7 (2011) 77-80
  M. Arndt, A. Bassi, D. Giulini, A. Heidmann, and J.-M. Raimond
  
• Gravitationally induced inhibitions of dispersion according to the Schrˆdinger-Newton Equation. Classical and Quantum Gravity 28 (2011) 195026
  D. Giulini and A. Groflardt
  
• High precision thermal modeling of complex systems with application to the flyby and Pioneer anomaly, Ann. Phys.523, 439 (2011)
  B. Rievers, C. Lämmerzahl
  
• Interference in above-threshold ionization electron distributions from molecules, Phys. Rev. A 83, 051401(R) (2011)
  J. Henkel, M. Lein, and V. Engel
  
• Magnetoresistance in a high-mobilitiy two-dimensional electron gas, Phys. Rev. B 83, 113301 (2011)
  L. Bockhorn, P. Barthold, D. Schuh, W. Wegscheider, R.J. Haug
  
• Phys. Rev. Lett. 107, 270401 (2011)
  S. Sinha, R. Nath, and L. Santos
  
• Pulsed quantum optomechanics, Proc Natl Acad Sci USA 108, 16182 (2011)
  M. R. Vanner, I. Pikovski, G. D. Cole, M. S. Kim, C. Brukner, K. Hammerer, G. J. Milburn, M. Aspelmeyer
  
• Tunable nonlocal coupling between Kondo impurities, Phys. Rev. B 83, 241308(R) (2011)
  D. Tutuc, B. Popescu, D. Schuh, W. Wegscheider, R.J. Haug
  
• Twin matter waves for interferometry beyond the classical limit, Science 334, 773 (2011)
  B. Lücke, M. Scherer, J. Kruse, L. Pezzé, F. Deuretzbacher, P. Hyllus, O. Topic, J. Peise, W. Ertmer, J. Arlt, L. Santos, A. Smerzi, C. Klempt
  
• “Atomic clocks with suppressed blackbody radiation shift”, Phys. Rev. Lett. 107, 030801 (2011)
  V.I. Yudin, A.V. Taichenachev, M.V. Okhapkin, S.N. Bagayev, Chr. Tamm, E. Peik, N. Huntemann, T.E. Mehlstäubler, and F. Riehle
  
• “Fertigungsverfahren für die Nanometrologie“, PTB Mitteilungen 2, 180 (2011)
  Rudolf Meeß, Tanja Mehlstäubler, Thomas Weimann
  
• “Simple method for generating Bose-Einstein condensates in a weak hybrid trap”, Phys. Rev. A, 83.035601 (2011)
  M. Zaiser et al.
  
• “The problematic backreaction of SUSY-breaking branes“, JHEP 1108 (2011) 105
  J. Blaback, U. H. Danielsson, D. Junghans, T. Van Riet, T. Wrase and M. Zagermann
  
• "All-fiber coherent beam combining with phase stabilization via differential pump power control," Opt. Lett. 37, 1202-1204 (2012)
  Henrik Tünnermann, Yan Feng, Jörg Neumann, Dietmar Kracht, and Peter Weßels
  
• "Beam quality degradation of a single-frequency Yb-doped photonic crystal fiber amplifier with low mode instability threshold power," Opt. Lett. 37, 4242-4244 (2012)
  Malte Karow, Henrik Tünnermann, Jörg Neumann, Dietmar Kracht, and Peter Weßels
  
• "Frequency resolved analysis of thermally induced refractive index changes in fiber amplifiers," Opt. Lett. 37, 3597-3599 (2012)
  Henrik Tünnermann, Jörg Neumann, Dietmar Kracht, and Peter Weßels
  
• "Gain dynamics and refractive index changes in fiber amplifiers: a frequency domain approach," Opt. Express 20, 13539-13550 (2012)
  Henrik Tünnermann, Jörg Neumann, Dietmar Kracht, and Peter Weßels
  
• "Matching of the propagation constants in an asymmetric single-mode fused fiber coupler for core pumping thulium-doped fiber at 795 nm," Opt. Lett. 37, 1844-1846 (2012)
  G. Pelegrina-Bonilla, K. Hausmann, K. Liu, H. Sayinc, U. Morgner, J. Neumann, and D. Kracht
  
• "Pump and signal combiner for bi-directional pumping of all-fiber lasers and amplifiers," Opt. Express 20, 28125-28141 (2012)
  T. Theeg, H. Sayinc, J. Neumann, L. Overmeyer, and D. Kracht
  
• "TEM00 mode content of a two stage single-frequency Yb-doped PCF MOPA with 246 W of output power," Opt. Express 20, 5319-5324 (2012)
  Malte Karow, Chandrajit Basu, Dietmar Kracht, Jörg Neumann, and Peter Weßels
  
• "Ultrafast, stretched-pulse thulium-doped fiber laser with a fiber-based dispersion management," Opt. Lett. 37, 2466-2468 (2012)
  A. Wienke, F. Haxsen, D. Wandt, U. Morgner, J. Neumann, and D. Kracht
  
• (2012) Characteristics and accuracies of the GRACE inter-satellite pointing, Adv Space Res 50(1):123- 135
  Bandikova, Tamara; Flury, Jakob; Ko, Ung-Dai
  
• (2012): On the Impact of Group Delay Variations on GNSS Time and Frequency Transfer, In: Proceedings of the 26th European Frequency and Time Forum (EFTF), Gothenburg, Sweden, April 24.-26. 2012, pp 514 - 521
  Kersten, T., Schön, S., Weinbach, U.
  
• A land uplift model in Fennoscandia combining GRACE and absolute gravimetry data. Physics and Chemistry of the Earth, 53-54, p. 54-60, 2012
  Müller, J., Naeimi, M., Gitlein, O., Timmen, L., Denker, H.
  
• A novel, robust quantum detection scheme, New J. Phys. 14, 023043 (2012)
  Hemmerling, F. Gebert, Y. Wan, and P. O. Schmidt
  
• A sub-40-mHz-linewidth laser based on a silicon single-crystal optical cavity, Nature Photonics 6, 687-692 (2012)
  T. Kessler, C. Hagemann, C. Grebing, T. Legero, U. Sterr, F. Riehle, M. J. Martin, L. Chen, and J. Ye
  
• Adiabaticity in the lateral electron momentum distribution after strong-field ionization, Phys. Rev. A 85, 021402(R) (2012)
  J. Henkel, M. Lein, V. Engel, and I. Dreissigacker
  
• Aharonov-Bohm effect in an electron-hole graphene ring system, Appl. Phys. Lett. 100, 203114 (2012)
  D. Smirnov, H. Schmidt, R.J. Haug
  
• Atomic Physics: Electrons get real (News & Views article), Nature 485, 313 (2012)
  M. Lein
  
• Design of the 10 m AEI prototype facility for interferometry studies, Applied Physics B , Volume 106, Issue 3, pp 551-557 (2012)
  T. Westphal et al.
  
• Digital Locking of a Three-Mirror Ring Cavity, IEEE International Conference on Control Applications (2012) 794- 799
  A. G. Kallapur, D. Schütte, I. R. Petersen, T. K. Boyson, E. Huntington, S. Z. Sayed Hassen, H. Song, M. Heurs
  
• Digitally enhanced homodyne interferometry.
 Optics Express, Volume 20, Issue 20, page 22195–22207, 2012
  Sutton, Andrew J.; Gerberding, Oliver; Heinzel, Gerhard; Shaddock, Daniel A.
  
• Exact energy– time uncertainty relation for arrival time by absorption, J. Phys. A 45, 185301 (2012)
  J. Kiukas, A. Ruschhaupt, P. O. Schmidt, and R. F. Werner
  
• Generalized Ramsey excitation scheme with suppressed light shift, Phys. Rev. Lett. 109, 213002 (2012)
  N. Huntemann, B. Lipphardt, M. V. Okhapkin, Chr. Tamm, E. Peik, A. V. Taichenachev, V. I. Yudin
  
• High Accuracy Correction of Blackbody Radiation Shift in an Optical Lattice Clock Phys. Rev. Lett. 109, 263004 (2012)
  T. Middelmann, S. Falke, C. Lisdat, U. Sterr
  
• High Power Ultra-Widely Tuneable Femtosecond Pulses from a Non-collinear Optical Parametric Oscillator (NOPO), Optics Express 20, 912-7 (2012)
  T. Lang, T. Binhammer, S. Rausch, G. Palmer, M. Emons, M. Schultze, A. Harth, U. Morgner
  
• High-accuracy optical clock based on the octupole transition in 171Yb+, Phys. Rev. Lett. 108, 090801 (2012)
  N. Huntemann, M. V. Okhapkin, B. Lipphardt, Chr. Tamm, E. Peik
  
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• Phasemeter core for intersatellite laser heterodyne interferometry: modelling, simulations and experiments. Classical and Quantum Gravity, Volume 30, Issue 23, article 235029, 2013
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