245 citations · 902 across the 24 of their papers we have counts for
24 papers
Practical Limits on Integrated Squeezers
Devin J. Dean, Taewon Park, Lars S. Madsen +12
Recent experiments have demonstrated the successful generation and detection of moderately squeezed vacuum states with integrated photonics. However, in order to benefit from the r…
Bright Pulsed Squeezed Light for Quantum-Enhanced Precision Microscopy
Alex Terrasson, Lars Madsen, Joel Grim +1
Squeezed states of light enable enhanced measurement precision by reducing noise below the standard quantum limit. A key application of squeezed light is nonlinear microscopy, wher…
Ultrafast viscosity measurement with ballistic optical tweezers
Lars S. Madsen, Muhammad Waleed, Catxere A. Casacio +3
Viscosity is an important property of out-of-equilibrium systems such as active biological materials and driven non-Newtonian fluids, and for fields ranging from biomaterials to ge…
Quantum correlations overcome the photodamage limits of light microscopy
Catxere A. Casacio, Lars S. Madsen, Alex Terrasson +5
State-of-the-art microscopes use intense lasers that can severely disturb biological processes, function and viability. This introduces hard limits on performance that only quantum…
The sounds of science: a symphony for many instruments and voices
Gerianne Alexander, Roland E. Allen, Anthony Atala +15
This paper is a celebration of the frontiers of science. Goodenough, the maestro who transformed energy usage and technology through the invention of the lithium ion battery, opens…
Quantum noise limited nanoparticle detection with exposed-core fiber
Nicolas P. Mauranyapin, Lars S. Madsen, Larnii Booth +5
Label-free biosensors are important tools for clinical diagnostics and for studying biology at the single molecule level. The development of optical label-free sensors has allowed…
Quantum enhanced optomechanical magnetometry
Bei-Bei Li, Jan Bilek, Ulrich B. Hoff +7
The resonant enhancement of both mechanical and optical response in microcavity optomechanical devices allows exquisitely sensitive measurements of stimuli such as acceleration, ma…
A Quantum Heat Machine from Fast Optomechanics
James S. Bennett, Lars S. Madsen, Halina Rubinsztein-Dunlop +1
We consider a thermodynamic machine in which the working fluid is a quantized harmonic oscillator that is controlled on timescales that are much faster than the oscillator period.…
Deterministic phase measurements exhibiting super-sensitivity and super-resolution
Clemens Schäfermeier, Miroslav Ježek, Lars S. Madsen +2
Phase super-sensitivity is obtained when the sensitivity in a phase measurement goes beyond the quantum shot noise limit, whereas super-resolution is obtained when the interference…
Evanescent single-molecule biosensing with quantum limited precision
N. P. Mauranyapin, L. S. Madsen, M. A. Taylor +2
Sensors that are able to detect and track single unlabelled biomolecules are an important tool both to understand biomolecular dynamics and interactions at nanoscale, and for medic…
Non-destructive profilometry of optical nanofibres
Lars S. Madsen, Christopher Baker, Halina Rubinsztein-Dunlop +1
Single-mode optical nanofibres are a central component of a broad range of applications and emerging technologies. Their fabrication has been extensively studied over the past deca…
Parsing Squeezed Light into Polarization Manifolds
C. R. Müller, L. S. Madsen, A. Klimov +4
We investigate polarization squeezing in squeezed coherent states with varying coherent amplitudes. In contrast to the traditional characterization based on the full Stokes paramet…
A Quantum Optomechanical Interface Beyond the Resolved Sideband Limit
James S. Bennett, Kiran Khosla, Lars S. Madsen +3
Mechanical oscillators which respond to radiation pressure are a promising means of transferring quantum information between light and matter. Optical--mechanical state swaps are a…
Complete elimination of information leakage in continuous-variable quantum communication channels
Christian S. Jacobsen, Lars S. Madsen, Vladyslav C. Usenko +2
In all lossy communication channels realized to date, information is inevitably leaked to a potential eavesdropper. Here we present a communication protocol that does not allow for…
Coherent control and feedback cooling in a remotely-coupled hybrid atom-optomechanical system
James S. Bennett, Lars S. Madsen, Mark Baker +2
Cooling to the motional ground state is an important first step in the preparation of nonclassical states of mesoscopic mechanical oscillators. Light-mediated coupling to a remote…
Gaussian error correction of quantum states in a correlated noisy channel
Mikael Lassen, Adriano Berni, Lars S. Madsen +2
Noise is the main obstacle for the realization of fault tolerant quantum information processing and secure communication over long distances. In this work, we propose a communicati…
Quantum-enhanced micro-mechanical displacement sensitivity
Ulrich B. Hoff, Glen I. Harris, Lars S. Madsen +5
We report on a hitherto unexplored application of squeezed light: for quantum-enhancement of mechanical transduction sensitivity in microcavity optomechanics. Using a toroidal sili…
Experimental determination of the degree of quantum polarisation of continuous variable states
Christian Kothe, Lars Skovgaard Madsen, Ulrik Lund Andersen +1
We demonstrate excitation-manifold resolved polarisation characterisation of continuous-variable (CV) quantum states. In contrast to traditional characterisation of polarisation th…
Experimental Investigation of the Evolution of Gaussian Quantum Discord in an Open System
Lars S. Madsen, Adriano Berni, Mikael Lassen +1
Gaussian quantum discord is a measure of quantum correlations in Gaussian systems. Using Gaussian discord we quantify the quantum correlations of a bipartite entangled state and a…
Continuous variable quantum key distribution with two-mode squeezed states
Lars S. Madsen, Vladyslav C. Usenko, Mikael Lassen +2
Quantum key distribution (QKD) enables two remote parties to grow a shared key which they can use for unconditionally secure communication [1]. The applicable distance of a QKD pro…
Assessing the Polarization of a Quantum Field from Stokes Fluctuation
A. B. Klimov, G. Bjork, J. Soderholm +8
We propose an operational degree of polarization in terms of the variance of the projected Stokes vector minimized over all the directions of the Poincaré sphere. We examine the pr…
Experimental Demonstration of Squeezed State Quantum Averaging
Mikael Lassen, Lars Skovgaard Madsen, Metin Sabuncu +2
We propose and experimentally demonstrate a universal quantum averaging process implementing the harmonic mean of quadrature variances. The harmonic mean protocol can be used to ef…
High quality anti-relaxation coating material for alkali atom vapor cells
M. V. Balabas, K. Jensen, W. Wasilewski +5
We present an experimental investigation of alkali atom vapor cells coated with a high quality anti-relaxation coating material based on alkenes. The prepared cells with single com…
Single mode quadrature entangled light from room temperature atomic vapour
W. Wasilewski, T. Fernholz, K. Jensen +4
We analyse a novel squeezing and entangling mechanism which is due to correlated Stokes and anti-Stokes photon forward scattering in a multi-level atom vapour. Following the propos…