247 citations · 936 across the 21 of their papers we have counts for
22 papers
Mid-IR hyperspectral imaging with undetected photons
Marlon Placke, Chiara Lindner, Felix Mann +5
Sensing with undetected photons has become a vibrant, application-driven research domain with a special focus on the mid-infrared (mid-IR) wavelength region. Since the mid-IR conta…
Hong-Ou-Mandel effect with two frequency-entangled photons of vastly different color
Felix Mann, Helen M. Chrzanowski, Marlon Placke +2
In the original formulation of the Hong-Ou-Mandel (HOM) experiment, when two otherwise indistinguishable photons are incident upon the two input ports of a balanced beam splitter,…
Noise analysis of a quasi-phase-matched quantum frequency converter and higher-order counter-propagating SPDC
Felix Mann, Helen M. Chrzanowski, Felipe Gewers +2
Quantum frequency conversion (QFC) will be an indispensable ingredient in future quantum technologies. For example, large-scale fibre-based quantum networks will require QFC to int…
Low-noise quantum frequency conversion in a monolithic cavity with bulk periodically poled potassium titanyl phosphate
Felix Mann, Helen M. Chrzanowski, Felipe Gewers +2
Interfacing the different building blocks of a future large scale quantum network will demand efficient and noiseless frequency conversion of quantum light. Nitrogen-vacancy (NV) c…
Mid-IR spectroscopy with NIR grating spectrometers
Paul Kaufmann, Helen M. Chrzanowski, Aron Vanselow +1
Mid-infrared (mid-IR) spectroscopy is a crucial workhorse for a plethora of analytical applications and is suitable for diverse materials, including gases, polymers or biological t…
Reconstruction of photon number conditioned states using phase randomized homodyne measurements
H. M. Chrzanowski, S. M. Assad, Julien Bernu +5
We experimentally demonstrate the reconstruction of a photon number conditioned state without using a photon number discriminating detector. By using only phase randomized homodyne…
Mid-Infrared Microscopy via Position Correlations of Undetected Photons
Inna Kviatkovsky, Helen M. Chrzanowski, Sven Ramelow
Quantum imaging with undetected photons (QIUP) has recently emerged as a new powerful imaging tool. Exploiting the spatial entanglement of photon pairs, it allows decoupling of the…
Low random duty-cycle errors in periodically-poled KTP revealed by sum-frequency generation
Felix Mann, Helen M. Chrzanowski, Sven Ramelow
Low-noise quantum frequency conversion in periodically-poled nonlinear crystals has proved challenging when the pump wavelength is shorter than the target wavelength. This is - at…
Frequency-domain optical coherence tomography with undetected mid-infrared photons
Aron Vanselow, Paul Kaufmann, Ivan Zorin +3
Mid-infrared light scatters much less than shorter wavelengths, allowing greatly enhanced penetration depths for optical imaging techniques such as optical coherence tomography (OC…
Quantum-enhanced stimulated emission microscopy
Gil Triginer Garces, Helen M. Chrzanowski, Shakib Daryanoosh +6
Nonlinear optical microscopy techniques have emerged as a set of successful tools for biological imaging. Stimulated emission microscopy belongs to a small subset of pump-probe tec…
Microscopy with undetected photons in the mid-infrared
Inna Kviatkovsky, Helen M. Chrzanowski, Ellen G. Avery +2
Owing to its capacity for unique (bio)-chemical specificity, microscopy withmid-IR illumination holds tremendous promise for a wide range of biomedical and industrial applications.…
Interfering distinguishable photons
Alex E. Jones, Adrian J. Menssen, Helen M. Chrzanowski +3
One of the central principles of quantum mechanics is that if there are multiple paths that lead to the same event, and there is no way to distinguish between them, interference oc…
Ultra-broadband SPDC for spectrally far separated photon pairs
Aron Vanselow, Paul Kaufmann, Helen M. Chrzanowski +1
Generating photon pairs via spontaneous parametric down-conversion (SPDC) in nonlinear crystals is important for a wide range of quantum optics experiments with spectral properties…
Entanglement properties of a measurement-based entanglement distillation experiment
Hao Jeng, Spyros Tserkis, Jing Yan Haw +5
Measures of entanglement can be employed for the analysis of numerous quantum information protocols. Due to computational convenience, logarithmic negativity is often the choice in…
Unconditional violation of the shot noise limit in photonic quantum metrology
Sergei Slussarenko, Morgan M. Weston, Helen M. Chrzanowski +4
Interferometric phase measurement is widely used to precisely determine quantities such as length, speed, and material properties. Without quantum correlations, the best phase sens…
Gaussian Optical Ising Machines
William R. Clements, Jelmer J. Renema, Y. Henry Wen +3
It has recently been shown that optical parametric oscillator (OPO) Ising machines, consisting of coupled optical pulses circulating in a cavity with parametric gain, can be used t…
Heralded quantum steering over a high-loss channel
Morgan M. Weston, Sergei Slussarenko, Helen M. Chrzanowski +6
Entanglement is the key resource for many long-range quantum information tasks, including secure communication and fundamental tests of quantum physics. These tasks require robust…
Efficient and pure femtosecond-pulse-length source of polarization-entangled photons
Morgan M. Weston, Helen M. Chrzanowski, Sabine Wollmann +9
We present a source of polarization entangled photon pairs based on spontaneous parametric downconversion engineered for frequency uncorrelated telecom photon generation. Our sourc…
Experimental Verification of Quantum Discord in Continuous-Variable States
S. Hosseini, S. Rahimi-Keshari, J. Y. Haw +6
We introduce a simple and efficient technique to verify quantum discord in unknown Gaussian states and a certain class of non-Gaussian states. We show that any separation in the pe…
Operational Significance of Discord Consumption: Theory and Experiment
Mile Gu, Helen M. Chrzanowski, Syed M. Assad +5
Coherent interactions that generate negligible entanglement can still exhibit unique quantum behaviour. This observation has motivated a search beyond entanglement for a complete d…
A Scalable, Self-Analyzing Digital Locking System for use on Quantum Optics Experiments
B. M. Sparkes, H. M. Chrzanowski, D. P. Parrain +3
Digital control of optics experiments has many advantages over analog control systems, specifically in terms of scalability, cost, flexibility, and the integration of system inform…
Demonstrating various quantum effects with two entangled laser beams
B. Hage, J. Janoušek, S. Armstrong +5
We report on the preparation of entangled two mode squeezed states of yet unseen quality. Based on a measurement of the covariance matrix we found a violation of the Reid and Drumm…