Publications


2024  |  2023  |  2022  |  2021  |  2020  | before 2020


2024


2023

Extreme thermodynamics in nanolitre volumes through stimulated Brillouin–Mandelstam scattering

Andreas Geilen, Alexandra Popp, Debavan Das, Saher Junaid, Christopher G. Poulton, Mario Chemnitz, Christoph Marquardt, Markus A. Schmidt, Birgit Stiller

Nature Physics 19 1805-1812 (2023) | Journal | PDF



2022

The deep space quantum link: prospective fundamental physics experiments using long-baseline quantum optics

Makan Mohageg, Luca Mazzarella, Charis Anastopoulos, Jason Gallicchio, Bei-Lok Hu, Thomas Jennewein, Spencer Johnson, Shih-Yuin Lin, Alexander Ling, et al.

EPJ Quantum Technology 9(25) (2022) | Journal | PDF


Quantum physics in space

Alessio Belenchia, Matteo Carlesso, Ömer Bayraktar, Daniele Dequal, Ivan Derkach, Giulio Gasbarri, Waldemar Herr, Ying Lia Li, Markus Rademacher, et al.

Physics Reports 951 1-70 (2022) | Journal | PDF



2021

The deep space quantum link: prospective fundamental physics experiments using long-baseline quantum optics

Makan Mohageg, Luca Mazzarella, Charis Anastopoulos, Jason Gallicchio, Bei-Lok Hu, Thomas Jennewein, Spencer Johnson, Shih-Yuin Lin, Alexander Ling, et al.

EPJ Quantum Technology 9(25) (2022) | Journal | PDF


Quantum technologies in space

Rainer Kaltenbaek, Antonio Acin, Laszlo Bacsardi, Paolo Bianco, Philippe Bouyer, Eleni Diamanti, Christoph Marquardt, Yasser Omar, Valerio Pruneri, et al.

Experimental Astronomy 51(3) 1677-1694 (2021) | Journal | PDF


Microsphere kinematics from the polarization of tightly focused nonseparable light

Stefan Berg-Johansen, Martin Neugebauer, Andrea Aiello, Gerd Leuchs, Peter Banzer, Christoph Marquardt

Optics Express 29(8) 12429-12439 (2021) | Journal | PDF


Microsphere kinematics from the polarization of tightly focused nonseparable light

Stefan Berg-Johansen, Martin Neugebauer, Andrea Aiello, Gerd Leuchs, Peter Banzer, Christoph Marquardt

Optics Express 29(8) 12429-12439 (2021) | Journal | PDF


Agile and versatile quantum communication: Signatures and secrets

Stefan Richter, Matthew Thornton, Imran Khan, Hamish Scott, Kevin Jaksch, Ulrich Vogl, Birgit Stiller, Gerd Leuchs, Christoph Marquardt, et al.

Physical Review X 11(1) 011038 (2021) | Journal | PDF



2020

Distillation of squeezing using an engineered pulsed parametric down-conversion source

Thomas Dirmeier, Johannes Tiedau, Imran Khan, Vahid Ansari, Christian R. Müller, Christine Silberhorn, Christoph Marquardt, Gerd Leuchs

Optics Express 28(21) 30784-30796 (2020) | Journal | PDF


Binary homodyne detection for observing quadrature squeezing in satellite links

Christian R. Müller, Kaushik P. Seshadreesan, C. Peuntinger, C. Marquardt

Physical Review Research 2(3) (2020) | Journal | PDF


Nonlinear power dependence of the spectral properties of an optical parametric oscillator below threshold in the quantum regime

Golnoush Shafiee, Dmitry V. Strekalov, Alexander Otterpohl, Florian Sedlmeir, Gerhard Schunk, Ulrich Vogl, Harald Schwefel, Gerd Leuchs, Christoph Marquardt

New Journal of Physics 22 (7) 073045 (2020) Preprint | PDF


Quantum-limited measurements of intensity noise levels in Yb-doped fiber amplifiers

Alexandra Popp, Victor Distler, Kevin Jaksch, Florian Sedlmeir, Christian Müller, Nicoletta Haarlammert, Thomas Schreiber, Christoph Marquardt, Andreas Tünnermann, et al.

Applied Physics B 126 (8) 130 (2020) Preprint | PDF


Efficient generation of temporally shaped photons using nonlocal spectral filtering

V. Averchenko, D. Sych, C. Marquardt, G. Leuchs

Physical Review A 101(1) (2020) | Journal | PDF



before 2020

Fading channel estimation for free-space continuous-variable secure quantum communication

László Ruppert, Christian Peuntinger, Bettina Heim, Kevin Günthner, Vladyslav C. Usenko, Dominique Elser, Gerd Leuchs, Radim Filip, Christoph Marquardt

New Journal of Physics 21(12) 123036 (2019) | Journal | PDF


R&D advances for quantum communication systems

Gerd Leuchs, Christoph Marquardt, Luis Sanchez-Soto, Dmitry V. Strekalov, Alan E. Willner

Optical Fiber Telecommunications VII Chapter 12 495-563 (2019) | Book Chapter


Squeezed vacuum states from a whispering gallery mode resonator

Alexander Otterpohl, Florian Sedlmeir, Ulrich Vogl, Thomas Dirmeier, Golnoush Shafiee, Gerhard Schunk, Dmitry Strekalov, Harald G. L. Schwefel, Tobias Gehring, et al.

Optica 6(11) 1375-1380 (2019) | Journal


The standard quantum limit of coherent beam combining

Christian Müller, Florian Sedlmeir, Vitaliy O. Martynov, Christoph Marquardt, Alexey V. Andrianov , Gerd Leuchs

New Journal of Physics 21(9) 093047 (2019) | Journal


Stabilization of transmittance fluctuations caused by beam wandering in continuous-variable quantum communication over free-space atmospheric channels

Vladyslav C. Usenko, Christian Peuntinger, Bettina Heim, Kevin Günthner, Ivan Derkach, Dominique Elser, Christoph Marquardt, Radim Filip, Gerd Leuchs

Optics Express 26(24) 31106-31115 (2018) | Journal


Binary Homodyne Detection for Observing Quadrature Squeezing in Satellite Links

Christian R. Mueller, Kaushik P Seshadreesan, Christian Peuntinger, Christoph Marquardt

arXiv: 1811.09423v1 (2018) Preprint | PDF


Quantum cryptography with twisted photons through an outdoor underwater channel

Frédéric Bouchard, Alicia Sit, Felix Hufnagel, Aazad Abbas, Yingwen Zhang, Khabat Heshami, Robert Fickler, Christoph Marquardt, Gerd Leuchs, et al.

Optics Express 26(17) 22563-22573 (2018) | Journal


Space QUEST mission proposal: experimentally testing decoherence due to gravity

Siddarth Koduru Joshi, Jacques Pienaar, Timothy C. Ralph, Luigi Cacciapuoti, Will McCutcheon, John Rarity, Dirk Giggenbach, Jin Gyu Lim, Vadim Makarov, et al.

New Journal of Physics 20 063016 (2018) | Journal


Off-resonant emission of photon pairs in nonlinear optical cavities

Valentin Averchenko, Gerhard Schunk, Michael Förtsch, Martin Fischer, Dmitry Strekalov, Gerd Leuchs, Christoph Marquardt

arXiv: 1805.08467v1 (2018) Preprint | PDF


Satellite-Based QKD

Imran Khan, Bettina Heim, Andreas Neuzner, Christoph Marquardt

Opt. Photon. News 29(2) 26-33 (2018) | Journal


Tackling Africa’s digital divide

Martin P. J. Lavery, Mojtaba Mansour Abadi, Ralf Bauer, Gilberto Brambilla, Ling Cheng, Mitchell A. Cox, Angela Dudley, Andrew D. Ellis, Nicolas K. Fontaine, et al.

Nature Photonics 12(5) 249-252 (2018)


Free-space propagation of high-dimensional structured optical fields in an urban environment

Martin P. J. Lavery, Christian Peuntinger, Kevin Guenthner, Peter Banzer, Dominique Elser, Robert W. Boyd, Miles J. Padgett, Christoph Marquardt, Gerd Leuchs

SCIENCE ADVANCES 3(10) e1700552 (2017) | Journal


Optimally cloned binary coherent states

C. R. Mueller, G. Leuchs, Ch. Marquardt, U. L. Andersen

PHYSICAL REVIEW A 96(4) 042311 (2017) | Journal


Free-space quantum links under diverse weather conditions

D. Vasylyev, A. A. Semenov, W. Vogel, K. Guenthner, A. Thurn, O. Bayraktar, Ch. Marquardt

PHYSICAL REVIEW A 96(4) 043856 (2017) | Journal


High-dimensional intracity quantum cryptography with structured photons

Alicia Sit, Frederic Bouchard, Robert Fickler, Jeremie Gagnon-Bischoff, Hugo Larocque, Khabat Heshami, Dominique Elser, Christian Peuntinger, Kevin Guenthner, et al.

OPTICA 4(9) 1006-1010 (2017) | Journal


Quantum-limited measurements of optical signals from a geostationary satellite

Kevin Guenthner, Imran Khan, Dominique Elser, Birgit Stiller, Oemer Bayraktar, Christian R. Mueller, Karen Saucke, Daniel Troendle, Frank Heine, et al.

OPTICA 4(6) 611-616 (2017) | Journal


Quantum communication with coherent states of light

Imran Khan, Dominique Elser, Thomas Dirmeier, Christoph Marquardt, Gerd Leuchs

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES 375(2099) 20160235 (2017) | Journal


Polarization-Selective Out-Coupling of Whispering-Gallery Modes

Florian Sedlmeir, Matthew R. Foreman, Ulrich Vogl, Richard Zeltner, Gerhard Schunk, Dmitry V. Strekalov, Christoph Marquardt, Gerd Leuchs, Harald G. L. Schwefel

PHYSICAL REVIEW APPLIED 7(2) 024029 (2017) | Journal


Temporal shaping of single photons enabled by entanglement

Valentin Averchenko, Denis Sych, Gerhard Schunk, Ulrich Vogl, Christoph Marquardt, Gerd Leuchs

PHYSICAL REVIEW A 96(4) 043822 (2017) | Journal


Free-Space Quantum Signatures Using Heterodyne Measurements

Callum Croal, Christian Peuntinger, Bettina Heim, Imran Khan, Christoph Marquardt, Gerd Leuchs, Petros Wallden, Erika Andersson, Natalia Korolkova

PHYSICAL REVIEW LETTERS 117(10) 100503 (2016) | Journal


Detecting the spatial quantum uncertainty of bosonic systems

Vanessa Chille, Nicolas Treps, Claude Fabre, Gerd Leuchs, Christoph Marquardt, Andrea Aiello

NEW JOURNAL OF PHYSICS 18 093004 (2016) | Journal


Attacks on practical quantum key distribution systems (and how to prevent them)

Nitin Jain, Birgit Stiller, Imran Khan, Dominique Elser, Christoph Marquardt, Gerd Leuchs

CONTEMPORARY PHYSICS 57(3) 366-387 (2016) | Journal


Frequency tuning of single photons from a whispering-gallery mode resonator to MHz-wide transitions

G. Schunk, U. Vogl, F. Sedlmeir, D. V. Strekalov, A. Otterpohl, V. Averchenko, H. G. L. Schwefel, G. Leuchs, Ch. Marquardt

JOURNAL OF MODERN OPTICS 63 (2016) | Journal


Efficient microwave to optical photon conversion: an electro-optical realization

Alfredo Rueda, Florian Sedlmeir, Michele C. Collodo, Ulrich Vogl, Birgit Stiller, Gerhard Schunk, Dmitry V. Strekalov, Christoph Marquardt, Johannes M. Fink, et al.

OPTICA 3(6) 597-604 (2016) | Journal


Evading Vacuum Noise: Wigner Projections or Husimi Samples?

C. R. Mueller, C. Peuntinger, T. Dirmeier, I. Khan, U. Vogl, Ch. Marquardt, G. Leuchs, L. L. Sanchez-Soto, Y. S. Teo, et al.

PHYSICAL REVIEW LETTERS 117(7) 070801 (2016) | Journal


Parsing polarization squeezing into Fock layers

Christian R. Mueller, Lars S. Madsen, Andrei B. Klimov, Luis L. Sanchez-Soto, Gerd Leuchs, Christoph Marquardt, Ulrik L. Andersen

PHYSICAL REVIEW A 93(3) 033816 (2016) | Journal


Experimental generation of amplitude squeezed vector beams

Vanessa Chille, Stefan Berg-Johansen, Marion Semmler, Peter Banzer, Andrea Aiello, Gerd Leuchs, Christoph Marquardt

OPTICS EXPRESS 24(11) 2385-2394 (2016) | Journal


30 years of squeezed light generation

Ulrik L. Andersen, Tobias Gehring, Christoph Marquardt, Gerd Leuchs

PHYSICA SCRIPTA 91(5) 053001 (2016) | Journal


Nonlinear and quantum optics with whispering gallery resonators

Dmitry V. Strekalov, Christoph Marquardt, Andrey B. Matsko, Harald G. L. Schwefel, Gerd Leuchs

JOURNAL OF OPTICS 18(12) 123002 (2016) | Journal


Single-mode squeezing in arbitrary spatial modes

Marion Semmler, Stefan Berg-Johansen, Vanessa Chille, Christian Gabriel, Peter Banzer, Andrea Aiello, Christoph Marquardt, Gerd Leuchs

OPTICS EXPRESS 24(7) 7633-7642 (2016) | Journal


Quantum-like nonseparable structures in optical beams

Andrea Aiello, Falk Toeppel, Christoph Marquardt, Elisabeth Giacobino, Gerd Leuchs

NEW JOURNAL OF PHYSICS 17 043024 (2015) | Journal


Near-infrared single-photon spectroscopy of a whispering gallery mode resonator using energy-resolving transition edge sensors

Michael Foertsch, Thomas Gerrits, Martin J. Stevens, Dmitry Strekalov, Gerhard Schunk, Josef U. Fuerst, Ulrich Vogl, Florian Sedlmeir, Harald G. L. Schwefel, et al.

JOURNAL OF OPTICS 17(6) 065501 (2015) | Journal


Classically entangled optical beams for high-speed kinematic sensing

Stefan Berg-Johansen, Falk Toeppel, Birgit Stiller, Peter Banzer, Marco Ornigotti, Elisabeth Giacobino, Gerd Leuchs, Andrea Aiello, Christoph Marquardt

OPTICA 2(10) 864-868 (2015) | Journal


Risk Analysis of Trojan-Horse Attacks on Practical Quantum Key Distribution Systems

Nitin Jain, Birgit Stiller, Imran Khan, Vadim Makarov, Christoph Marquardt, Gerd Leuchs

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS 21(3) 6600710 (2015) | Journal


Intracavity Squeezing Can Enhance Quantum-Limited Optomechanical Position Detection through Deamplification

V. Peano, H. G. L. Schwefel, Ch. Marquardt, F. Marquardt

Physical Review Letters 115(24) 243603 (2015) | Journal | PDF


Entangling the Whole by Beam Splitting a Part

Callum Croal, Christian Peuntinger, Vanessa Chille, Christoph Marquardt, Gerd Leuchs, Natalia Korolkova, Ladislav Mista Jr.

PHYSICAL REVIEW LETTERS 115(19) 190501 (2015) | Journal


A robust quantum receiver for phase shift keyed signals

C. R. Mueller, Ch Marquardt

NEW JOURNAL OF PHYSICS 17 032003 (2015) | Journal


Quantum nature of Gaussian discord: Experimental evidence and role of system-environment correlations

Vanessa Chille, Niall Quinn, Christian Peuntinger, Callum Croal, Ladislav Mista Jr., Christoph Marquardt, Gerd Leuchs, Natalia Korolkova

PHYSICAL REVIEW A 91(5) 050301 (2015) | Journal


Interfacing transitions of different alkali atoms and telecom bands using one narrowband photon pair source

Gerhard Schunk, Ulrich Vogl, Dmitry V. Strekalov, Michael Foertsch, Florian Sedlmeir, Harald G. L. Schwefel, Manuela Goebelt, Silke Christiansen, Gerd Leuchs, et al.

OPTICA 2(9) 773-778 (2015) | Journal


Quantum uncertainty in the beam width of spatial optical modes

Vanessa Chille, Peter Banzer, Andrea Aiello, Gerd Leuchs, Christoph Marquardt, Nicolas Treps, Claude Fabre

OPTICS EXPRESS 23(25) 32777-32787 (2015) | Journal


Highly efficient generation of single-mode photon pairs from a crystalline whispering-gallery-mode resonator source

Michael Foertsch, Gerhard Schunk, Josef U. Fuerst, Dmitry Strekalov, Thomas Gerrits, Martin J. Stevens, Florian Sedlmeir, Harald G. L. Schwefel, Sae Woo Nam, et al.

PHYSICAL REVIEW A 91(2) 023812 (2015) | Journal


Depolarized guided acoustic wave Brillouin scattering in hollow-core photonic crystal fibers

Wenjia Elser Nee Zhong, Birgit Stiller, Dominique Elser, Bettina Heim, Christoph Marquardt, Gerd Leuchs

OPTICS EXPRESS 23(21) UNSP 247705 27707-27714 (2015) | Journal


Classical entanglement in polarization metrology

Falk Toeppel, Andrea Aiello, Christoph Marquardt, Elisabeth Giacobino, Gerd Leuchs

NEW JOURNAL OF PHYSICS 16 073019 (2014) | Journal


Identifying modes of large whispering-gallery mode resonators from the spectrum and emission pattern

Gerhard Schunk, Josef U. Fuerst, Michael Foertsch, Dmitry V. Strekalov, Ulrich Vogl, Florian Sedlmeir, Harald G. L. Schwefel, Gerd Leuchs, Christoph Marquardt

OPTICS EXPRESS 22(25) 30795-30806 (2014) | Journal


Trojan-horse attacks threaten the security of practical quantum cryptography

Nitin Jain, Elena Anisimova, Imran Khan, Vadim Makarov, Christoph Marquardt, Gerd Leuchs

NEW JOURNAL OF PHYSICS 16 123030 (2014) | Journal


All-optical phase-preserving multilevel amplitude regeneration

Tobias Roethlingshoefer, Thomas Richter, Colja Schubert, Georgy Onishchukov, Bernhard Schmauss, Gerd Leuchs

Optics Express 22(22) 27077-27085 (2014) | Journal


Observation of the Geometric Spin Hall Effect of Light

Jan Korger, Andrea Aiello, Vanessa Chille, Peter Banzer, Christoffer Wittmann, Norbert Lindlein, Christoph Marquardt, Gerd Leuchs

PHYSICAL REVIEW LETTERS 112(11) 113902 (2014) | Journal


Cascaded phase-preserving multilevel amplitude regeneration

Tobias Roethlingshoefer, Georgy Onishchukov, Bernhard Schmauss, Gerd Leuchs

Optics Express 22(26) 31729-31734 (2014) | Journal


Atmospheric continuous-variable quantum communication

B. Heim, C. Peuntinger, N. Killoran, I. Khan, C. Wittmann, Ch Marquardt, G. Leuchs

NEW JOURNAL OF PHYSICS 16 113018 (2014) | Journal


Phase regeneration of a star-8QAM signal in a phase-sensitive amplifier with conjugated pumps

B. Stiller, G. Onishchukov, B. Schmauss, G. Leuchs

Optics Express 22(1) 1028-1035 (2014) | Journal


All-Optical Simultaneous Multilevel Amplitude and Phase Regeneration

Tobias Roethlingshoefer, Georgy Onishchukov, Bernhard Schmauss, Gerd Leuchs

IEEE Photonics Technology Letters 26(6) 556-559 (2014) | Journal


Distribution of Squeezed States through an Atmospheric Channel

Christian Peuntinger, Bettina Heim, Christian R. Mueller, Christian Gabriel, Christoph Marquardt, Gerd Leuchs

PHYSICAL REVIEW LETTERS 113(6) 060502 (2014) | Journal


Atomic mercury vapor inside a hollow-core photonic crystal fiber

Ulrich Vogl, Christian Peuntinger, Nicolas Y. Joly, Philip St. J. Russell, Christoph Marquardt, Gerd Leuchs

OPTICS EXPRESS 22(24) 29375-29381 (2014) | Journal


A versatile source of single photons for quantum information processing

Michael Foertsch, Josef U. Fuerst, Christoffer Wittmann, Dmitry Strekalov, Andrea Aiello, Maria V. Chekhova, Christine Silberhorn, Gerd Leuchs, Christoph Marquardt

NATURE COMMUNICATIONS 4 1818 (2013) | Journal


Optimal working points for continuous-variable quantum channels

Imran Khan, Christoffer Wittmann, Nitin Jain, Nathan Killoran, Norbert Luetkenhaus, Christoph Marquardt, Gerd Leuchs

PHYSICAL REVIEW A 88(1) 010302 (2013) | Journal


An optimized photon pair source for quantum circuits

Georg Harder, Vahid Ansari, Benjamin Brecht, Thomas Dirmeier, Christoph Marquardt, Christine Silberhorn

OPTICS EXPRESS 21(12) 13975-13985 (2013) | Journal


The polarization properties of a tilted polarizer

Jan Korger, Tobias Kolb, Peter Banzer, Andrea Aiello, Christoffer Wittmann, Christoph Marquardt, Gerd Leuchs

OPTICS EXPRESS 21(22) 27032-27042 (2013) | Journal


Multipolar hierarchy of efficient quantum polarization measures

P. de la Hoz, A. B. Klimov, G. Bjork, Y. -H. Kim, C. Mueller, Ch. Marquardt, G. Leuchs, L. L. Sanchez-Soto

PHYSICAL REVIEW A 88(6) 063803 (2013) | Journal


The photonic wheel - demonstration of a state of light with purely transverse angular momentum

P. Banzer, M. Neugebauer, A. Aiello, C. Marquardt, N. Lindlein, T. Bauer, G. Leuchs

JOURNAL OF THE EUROPEAN OPTICAL SOCIETY-RAPID PUBLICATIONS 8 13032 (2013) | Journal


Distributing Entanglement with Separable States

Christian Peuntinger, Vanessa Chille, Ladislav Mista Jr., Natalia Korolkova, Michael Foertsch, Jan Korger, Christoph Marquardt, Gerd Leuchs

PHYSICAL REVIEW LETTERS 111(23) 230506 (2013) | Journal


Entanglement of Gaussian states and the applicability to quantum key distribution over fading channels

Vladyslav C. Usenko, Bettina Heim, Christian Peuntinger, Christoffer Wittmann, Christoph Marquardt, Gerd Leuchs, Radim Filip

NEW JOURNAL OF PHYSICS 14 093048 (2012) | Journal


Tools for detecting entanglement between different degrees of freedom in quadrature squeezed cylindrically polarized modes

C. Gabriel, A. Aiello, S. Berg-Johansen, Ch Marquardt, G. Leuchs

EUROPEAN PHYSICAL JOURNAL D 66(7) 172 (2012) | Journal


Quadrature phase shift keying coherent state discrimination via a hybrid receiver

C. R. Mueller, M. A. Usuga, C. Wittmann, M. Takeoka, Ch Marquardt, U. L. Andersen, G. Leuchs

NEW JOURNAL OF PHYSICS 14 083009 (2012) | Journal


Quantum polarization tomography of bright squeezed light

C. R. Mueller, B. Stoklasa, C. Peuntinger, C. Gabriel, J. Rehacek, Z. Hradil, A. B. Klimov, G. Leuchs, Ch Marquardt, et al.

NEW JOURNAL OF PHYSICS 14 085002 (2012) | Journal


Probabilistic cloning of coherent states without a phase reference

Christian R. Mueller, Christoffer Wittmann, Petr Marek, Radim Filip, Christoph Marquardt, Gerd Leuchs, Ulrik L. Andersen

PHYSICAL REVIEW A 86(1) 010305 (2012) | Journal


After-gate attack on a quantum cryptosystem

C. Wiechers, L. Lydersen, C. Wittmann, D. Elser, J. Skaar, Ch Marquardt, V. Makarov, G. Leuchs

NEW JOURNAL OF PHYSICS 13 013043 (2011) | Journal


Birefringence and dispersion of cylindrically polarized modes in nanobore photonic crystal fiber

T. G. Euser, M. A. Schmidt, N. Y. Joly, C. Gabriel, C. Marquardt, L. Y. Zang, M. Foertsch, P. Banzer, A. Brenn, et al.

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS 28(1) 193-198 (2011) | Journal


Entangling Different Degrees of Freedom by Quadrature Squeezing Cylindrically Polarized Modes

C. Gabriel, A. Aiello, W. Zhong, T. G. Euser, N. Y. Joly, P. Banzer, M. Foertsch, D. Elser, U. L. Andersen, et al.

PHYSICAL REVIEW LETTERS 106(6) 060502 (2011) | Journal


Quantum Light from a Whispering-Gallery-Mode Disk Resonator

J. U. Fuerst, D. V. Strekalov, D. Elser, A. Aiello, U. L. Andersen, Ch Marquardt, G. Leuchs

PHYSICAL REVIEW LETTERS 106(11) 113901 (2011) | Journal


Superlinear threshold detectors in quantum cryptography

Lars Lydersen, Nitin Jain, Christoffer Wittmann, Oystein Maroy, Johannes Skaar, Christoph Marquardt, Vadim Makarov, Gerd Leuchs

PHYSICAL REVIEW A 84(3) 032320 (2011) | Journal


Device Calibration Impacts Security of Quantum Key Distribution

Nitin Jain, Christoffer Wittmann, Lars Lydersen, Carlos Wiechers, Dominique Elser, Christoph Marquardt, Vadim Makarov, Gerd Leuchs

PHYSICAL REVIEW LETTERS 107(11) 110501 (2011) | Journal


Geometric Spin Hall Effect of Light at polarizing interfaces

J. Korger, A. Aiello, C. Gabriel, P. Banzer, T. Kolb, C. Marquardt, G. Leuchs

APPLIED PHYSICS B-LASERS AND OPTICS 102(3) 427-432 (2011) | Journal


Classical and quantum properties of cylindrically polarized states of light

Annemarie Holleczek, Andrea Aiello, Christian Gabriel, Christoph Marquardt, Gerd Leuchs

OPTICS EXPRESS 19(10) 9714-9736 (2011) | Journal


Noise-powered probabilistic concentration of phase information

Mario A. Usuga, Christian R. Mueller, Christoffer Wittmann, Petr Marek, Radim Filip, Christoph Marquardt, Gerd Leuchs, Ulrik L. Andersen

NATURE PHYSICS 6(10) 767-771 (2010) | Journal


Continuous-variable entanglement distillation of non-Gaussian mixed states

Ruifang Dong, Mikael Lassen, Joel Heersink, Christoph Marquardt, Radim Filip, Gerd Leuchs, Ulrik L. Andersen

PHYSICAL REVIEW A 82(1) 012312 (2010) | Journal


Naturally Phase-Matched Second-Harmonic Generation in a Whispering-Gallery-Mode Resonator

J. U. Fuerst, D. V. Strekalov, D. Elser, M. Lassen, U. L. Andersen, C. Marquardt, G. Leuchs

PHYSICAL REVIEW LETTERS 104(15) 153901 (2010) | Journal


Assessing the Polarization of a Quantum Field from Stokes Fluctuations

A. B. Klimov, G. Bjoerk, J. Soederholm, L. S. Madsen, M. Lassen, U. L. Andersen, J. Heersink, R. Dong, Ch. Marquardt, et al.

PHYSICAL REVIEW LETTERS 105(15) 153602 (2010) | Journal


A generator for unique quantum random numbers based on vacuum states

Christian Gabriel, Christoffer Wittmann, Denis Sych, Ruifang Dong, Wolfgang Mauerer, Ulrik L. Andersen, Christoph Marquardt, Gerd Leuchs

NATURE PHOTONICS 4(10) 711-715 (2010) | Journal


Transverse angular momentum of photons

Andrea Aiello, Christoph Marquardt, Gerd Leuchs

PHYSICAL REVIEW A 81(5) 053838 (2010) | Journal


Low-Threshold Optical Parametric Oscillations in a Whispering Gallery Mode Resonator

J. U. Fuerst, D. V. Strekalov, D. Elser, A. Aiello, U. L. Andersen, Ch. Marquardt, G. Leuchs

PHYSICAL REVIEW LETTERS 105(26) 263904 (2010) | Journal


Atmospheric channel characteristics for quantum communication with continuous polarization variables

B. Heim, D. Elser, T. Bartley, M. Sabuncu, C. Wittmann, D. Sych, C. Marquardt, G. Leuchs

APPLIED PHYSICS B-LASERS AND OPTICS 98 (2010) | Journal


Nonparaxial polarizers

Andrea Aiello, Christoph Marquardt, Gerd Leuchs

OPTICS LETTERS 34(20) 3160-3162 (2009)


Transverse Angular Momentum and Geometric Spin Hall Effect of Light

Andrea Aiello, Norbert Lindlein, Christoph Marquardt, Gerd Leuchs

PHYSICAL REVIEW LETTERS 103(10) 100401 (2009) | Journal


Experimental entanglement distillation of mesoscopic quantum states

Ruifang Dong, Mikael Lassen, Joel Heersink, Christoph Marquardt, Radim Filip, Gerd Leuchs, Ulrik L. Andersen

NATURE PHYSICS 4(12) 919-923 (2008) | Journal


Experimental demonstration of macroscopic quantum coherence in Gaussian states

Christoph Marquardt, Ulrik L. Andersen, Gerd Leuchs, Yuishi Takeno, Mitsuyoshi Yukawa, Hidehiro Yonezawa, Akira Furusawa

PHYSICAL REVIEW A 76(3) 030101 (2007) | Journal


Quantum reconstruction of an intense polarization squeezed optical state

Ch. Marquardt, J. Heersink, R. Dong, M. V. Chekhova, A. B. Klimov, L. L. Sanchez-Soto, U. L. Andersen, G. Leuchs

PHYSICAL REVIEW LETTERS 99(22) 220401 (2007) | Journal


Reduction of guided acoustic wave Brillouin scattering in photonic crystal fibers

D. Elser, U. L. Andersen, A. Korn, O. Gloeckl, S. Lorenz, Ch. Marquardt, G. Leuchs

PHYSICAL REVIEW LETTERS 97(13) 133901 (2006) | Journal


Distillation of squeezing from non-Gaussian quantum states

J. Heersink, Ch. Marquardt, R. Dong, R. Filip, S. Lorenz, G. Leuchs, U. L. Andersen

PHYSICAL REVIEW LETTERS 96(25) 253601 (2006) | Journal


Experiment towards continuous-variable entanglement swapping: Highly correlated four-partite quantum state

O Glockl, S Lorenz, Christoph Marquardt, J Heersink, M Brownnutt, Christine Silberhorn, Q Pan, P van Loock, N Korolkova, et al.

PHYSICAL REVIEW A 68(1) 012319 (2003) | Journal


Quantum interferometry with intense optical pulses

Gerd Leuchs, Christine Silberhorn, O Glockl, Christoph Marquardt, N Korolkova

FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS 51(4-5) 409-413 (2003) | Journal


Direct experimental test of non-separability and other quantum techniques using continuous variables of light

N Korolkova, Christine Silberhorn, O Glockl, S Lorenz, Christoph Marquardt, Gerd Leuchs

EUROPEAN PHYSICAL JOURNAL D 18(2) 229-235 (2002) | Journal


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