Christian Kurtsiefer
Principal Investigator
Centre for Quantum Technologies
Professor
Department of Physics, Faculty of Science, National University of Singapore
S15-02-04
Christian Kurtsiefer received his PhD in experimental physics in 1997 in the field of atom interferometry from the University of Konstanz, Germany. After a postdoc stint at IBM Almaden research center in San Jose, CA, he became a scientific staff member in the Physics Department at the Ludwig-Maximilian University in Munich from 1999 to 2003. He joined the Physics Department of NUS in 2003, and was one of the founding members of CQT in 2007. He is elected fellow of the American Physical Society and past president of the Institute of Physics Singapore.
His main research interests are in quantum optics and atomic physics, with an emphasis on experimental quantum information and communication, single photon technologies and atom-light interaction. Recent work is focused on single photon technologies like practical QKD systems, atom-photon interfaces, hybrid quantum systems, and quantum randomness sources.
Preprints & Publications
Direct measurement of coherent light proportion from a practical laser source
Fano Resonance in Excitation Spectroscopy and Cooling of an Optically Trapped Single Atom
Practical Range Sensing with Thermal Light
Low Noise Near-Concentric Optical Cavity Design
Absolute clock synchronization with a single time-correlated photon pair source over 10km
Distributing Polarization Entangled Photon Pairs with High Rate over Long Distance through Standard Telecommunication Fiber
Observation of the Mollow Triplet from an optically confined single atom
Coherence of a dynamically decoupled single neutral atom
A wide-range wavelength-tunable photon-pair source for characterizing single-photon detectors
Coupling Light to Higher Order Transverse Modes of a Near-Concentric Optical Cavity
Fibre polarization state compensation in entanglement-based quantum key distribution
Spectral Compression of Narrowband Single Photons with a Resonant Cavity
Stable Polarization Entanglement based Quantum Key Distribution over Metropolitan Fibre Network
Transmission spectroscopy of a single atom in the presence of tensor light shifts
Symmetrical clock synchronization with time-correlated photon pairs
Characterizing nonlocal dispersion compensation in deployed telecommunications fiber
Design considerations for an optical link supporting intersatellite quantum key distribution
Asymmetric delay attack on an entanglement-based bidirectional clock synchronization protocol
Randomness extraction from Bell violation with continuous parametric down conversion
Characterization of a photon pair source based on a cold atomic ensemble using a cascade level scheme
Operating a near-concentric cavity at the last stable resonance
Multi-pulse fitting of Transition Edge Sensor signals from a near-infrared continuous-wave source
Photon bandwidth dependence of light-matter interaction
Quantifying the role of thermal motion in free-space light-atom interaction
Characterization of very narrow spectral lines with temporal intensity interferometry
Experimental many-pairs nonlocality
Polarization gradient cooling of single atoms in optical dipole traps
Single atoms coupled to a near-concentric cavity
Nonlinear photon-atom coupling with 4Pi microscopy
Breakdown flash at telecom wavelengths in InGaAs avalanche photodiodes
Optical Intensity Interferometry through Atmospheric Turbulence
Probing the quantum-classical boundary with compression software
Random numbers from vacuum fluctuations
Time-resolved Scattering of a Single Photon by a Single Atom
Hong-Ou-Mandel interference between triggered and heralded single photons from separate atomic systems
Polarization entanglement and quantum beats of photon pairs from four-wave mixing in a cold Rb-87 ensemble
Approaching Tsirelson’s Bound in a Photon Pair Experiment
Controlling the interference of single photons emitted by independent atomic sources
A universal setup for active control of a single-photon detector
Measuring Temporal Photon Bunching in Blackbody Radiation
Generation of an exponentially rising single-photon field from parametric conversion in atoms
Diffraction-limited Fabry-Perot Cavity in the Near Concentric Regime
Reversing the temporal envelope of a heralded single photon using a cavity
The black paper of quantum cryptography: Real implementation problems
Experimental implementation of bit commitment in the noisy-storage model
Excitation of a single atom with exponentially rising light pulses
Narrow Band Source of Transform-Limited Photon Pairs via Four-Wave Mixing in a Cold Atomic Ensemble.
Preparation of an Exponentially Rising Optical Pulse for Efficient Excitation of Single Atoms in Free Space
Sagnac-loop phase shifter with polarization-independent operation
Full-field implementation of a perfect eavesdropper on a quantum cryptography system
Detection of Single Molecules Illuminated by a Light-Emitting Diode
Experimentally faking the violation of Bell
Towards high-fidelity interference of photons emitted by two remotely trapped Rb-87 atoms
High speed optical quantum random number generation
Interaction of light with a single atom in the strong focusing regime
Eliminating Spectral Distinguishability in Ultrafast Spontaneous Parametric Down-conversion
Phase shift of a weak coherent beam induced by a single atom
Clock synchronization by remote detection of correlated photon pairs
Daylight operation of a free space, entanglement-based quantum key distribution system
Interfacing light and single atoms with a lens
Phase Shift of a Weak Coherent Beam by a Single Atom
Entanglement-Based Free Space Quantum Cryptography in Full Daylight
Experimental demonstration of a quantum protocol for Byzantine agreement and liar detection
Experimental quantum key distribution based on a Bell test
Wigner tomography of two qubit states and quantum cryptography
Testing quantum correlations versus single-particle properties within Leggett’s model and beyond
Strong interaction between light and a single trapped atom without the need for a cavity
Absolute emission rates of spontaneous parametric down conversion into single transverse Gaussian modes
Experimental Falsification of Leggett’s Non-Local Variable Model
An atom and a photon
Breaking a quantum key distribution system through a timing side channel
Experimental demonstration of four-party quantum secret sharing
Joint Spectrum Mapping of Polarization Entanglement in Spontaneous Parametric Down-conversion
Free-space quantum key distribution with entangled photons
Experimental quantum secret sharing
Experimental Polarization State Tomography using Optimal Polarimeters
Observation of Entanglement of a Single Photon with a Trapped Atom
An Optimal Photon Counting Polarimeter
Complete Deterministic Linear Optics Bell State Analysis
Entanglement Persistency of Multiphoton Entangled States
Analysis of a single-atom dipole trap
Single photon emission from SiV centres in diamond produced by ion implantation
Preparation of Bell States with Controlled White Noise
Free space quantum cryptography using compact polarization entangled photon pair source
Upper bound on the duration of quantum jumps
Countering detector manipulation attacks in quantum communication through detector self-testing
