1.2k citations · 5.6k across the 43 of their papers we have counts for
24 papers · 1 filter
Photocounting measurements with dead time and afterpulses in the continuous-wave regime
A. A. Semenov, J. Samelin, Ch. Boldt +4
The widely used experimental technique of continuous-wave detection assumes counting pulses of photocurrent from a click-type detector inside a given measurement time window. With…
Multi-step two-copy distillation of squeezed states via two photon subtraction
Stephan Grebien, Julian Goettsch, Boris Hage +2
Squeezed states of light have been improving the sensitivity of gravitational-wave observatories and are nonclassical resources of quantum cryptography and envisioned photonic quan…
Quantum Enhanced Microrheology of a Living Cell
Michael A. Taylor, Jiri Janousek, Vincent Daria +4
We demonstrate the first biological measurement with precision surpassing the quantum noise limit. Lipid particles within a living yeast cell are tracked with sub-shot noise sensit…
Quantum Correlations beyond Entanglement and Discord
S. Köhnke, E. Agudelo, M. Schünemann +4
Dissimilar notions of quantum correlations have been established, each being motivated through particular applications in quantum information science and each competing for being r…
Beyond conventional photon-number detection with click detectors
Johannes Kröger, Thomas Ahrens, Jan Sperling +3
Photon-number measurements are a fundamental technique for the discrimination and characterization of quantum states of light. Beyond the abilities of state-of-the-art devices, we…
Unified nonclassicality criteria
Sergej Ryl, Jan Sperling, Elizabeth Agudelo +4
In this work we generalize the Bochner criterion addressing the characteristic function, i.e., the Fourier transform, of the Glauber-Sudarshan phase-space function. For this purpos…
Biological measurement beyond the quantum limit
Michael A. Taylor, Jiri Janousek, Vincent Daria +4
Quantum noise places a fundamental limit on the per photon sensitivity attainable in optical measurements. This limit is of particular importance in biological measurements, where…
Programmable Multimode Quantum Networks
Seiji Armstrong, Jean-Francois Morizur, Jiri Janousek +4
Entanglement between large numbers of quantum modes is the quintessential resource for future technologies such as the quantum internet. Conventionally the generation of multimode…
Entangled Qubits in a non-Gaussian Quantum State
T. Kiesel, W. Vogel, B. Hage +1
We experimentally generate and tomographically characterize a mixed, genuinely non-Gaussian bipartite continuous-variable entangled state. By testing entanglement in 22-dim…
Iterative Entanglement Distillation: Approaching full Elimination of Decoherence
Boris Hage, Aiko Samblowski, James DiGuglielmo +2
The distribution and processing of quantum entanglement form the basis of quantum communication and quantum computing. The realization of the two is difficult because quantum infor…
Preparing the bound instance of quantum entanglement
J. DiGuglielmo, A. Samblowski, B. Hage +3
Among the possibly most intriguing aspects of quantum entanglement is that it comes in "free" and "bound" instances. Bound entangled states require entangled states in preparation…
Markov Chain Monte Carlo Estimation of Quantum States
James DiGuglielmo, Chris Messenger, Jaromir Fiurasek +4
We apply a Bayesian data analysis scheme known as the Markov Chain Monte Carlo (MCMC) to the tomographic reconstruction of quantum states. This method yields a vector, known as the…
Experimental test of nonclassicality criteria
T. Kiesel, W. Vogel, B. Hage +3
We experimentally examine the nonclassical character of a class of non-Gaussian states known as phase-diffused squeezed states. These states may show no squeezing effect at all, an…
Preparation of distilled and purified continuous variable entangled states
Boris Hage, Aiko Samblowski, James DiGuglielmo +3
The distribution of entangled states of light over long distances is a major challenge in the field of quantum information. Optical losses, phase diffusion and mixing with thermal…
Towards Einstein-Podolsky-Rosen quantum channel multiplexing
Boris Hage, Aiko Samblowski, Roman Schnabel
A single broadband squeezed field constitutes a quantum communication resource that is sufficient for the realization of a large number N of quantum channels based on distributed E…
Multiple copy distillation and purification of phase diffused squeezed states
Petr Marek, Jaromir Fiurasek, Boris Hage +3
We provide a detailed theoretical analysis of multiple copy purification and distillation protocols for phase diffused squeezed states of light. The standard iterative distillation…
On the distillation and purification of phase-diffused squeezed states
B. Hage, A. Franzen, J. DiGuglielmo +3
Recently it was discovered that non-Gaussian decoherence processes, such as phase-diffusion, can be counteracted by purification and distillation protocols that are solely built on…
Squeezed-field injection for gravitational wave interferometers
Henning Vahlbruch, Simon Chelkowski, Boris Hage +3
In a recent table-top experiment we demonstrated the compatibility of three advanced interferometer techniques for gravitational wave detection, namely power-recycling, detuned sig…
Demonstration of a squeezed light enhanced power- and signal-recycled Michelson interferometer
Henning Vahlbruch, Simon Chelkowski, Boris Hage +3
We report on the experimental combination of three advanced interferometer techniques for gravitational wave detection, namely power-recycling, detuned signal-recycling and squeeze…
Coherent control of vacuum squeezing in the Gravitational-Wave Detection Band
Henning Vahlbruch, Simon Chelkowski, Boris Hage +3
We propose and demonstrate a coherent control scheme for stable phase locking of squeezed vacuum fields. We focus on sideband fields at frequencies from 10Hz to 10kHz which is a fr…
Experimental demonstration of continuous variable purification of squeezed states
A. Franzen, B. Hage, J. DiGuglielmo +2
We report on the first experimental demonstration of purification of nonclassical continuous variable states. The protocol uses two copies of phase-diffused states overlapped on a…
Experimental characterization of frequency dependent squeezed light
Simon Chelkowski, Henning Vahlbruch, Boris Hage +4
We report on the demonstration of broadband squeezed laser beams that show a frequency dependent orientation of the squeezing ellipse. Carrier frequency as well as quadrature angle…
Experimental characterization of Gaussian quantum communication channels
James DiGuglielmo, Boris Hage, Alexander Franzen +2
We present a full experimental characterization of continuous variable quantum communication channels established by shared entanglement together with local operations and classica…
Observation of squeezed light with 10dB quantum noise reduction
Henning Vahlbruch, Moritz Mehmet, Nico Lastzka +6
Squeezing of light's quantum noise requires temporal rearranging of photons. This again corresponds to creation of quantum correlations between individual photons. Squeezed light i…