2.8k citations · 9.2k across the 36 of their papers we have counts for
18 papers · 1 filter
Continuous-Variable Quantum Key Distribution over 15 km Multi-Core Fiber
S. Sarmiento, S. Etcheverry, J. Aldama +8
The secure transfer of information is critical for the ever-increasing demands of the digital world. Continuous-variable quantum key distribution (CV-QKD) is a technology that can…
A quantum-enhanced wide-field phase imager
Robin Camphausen, Álvaro Cuevas, Luc Duempelmann +7
Quantum techniques can be used to enhance the signal-to-noise ratio in optical imaging. Leveraging the latest advances in single photon avalanche diode array cameras and multi-phot…
Phase diffusion quantum entropy source on a silicon chip
Miquel Rudé, Carlos Abellán, Albert Capdevila +4
We report an accelerated laser phase diffusion quantum entropy source with all non-laser optical and optoelectronic elements implemented in silicon photonics. The device uses effic…
Space QUEST mission proposal: Experimentally testing decoherence due to gravity
Siddarth Koduru Joshi, Jacques Pienaar, Timothy C. Ralph +42
Models of quantum systems on curved space-times lack sufficient experimental verification. Some speculative theories suggest that quantum properties, such as entanglement, may exhi…
A quantum entropy source on an InP photonic integrated circuit for random number generation
Carlos Abellan, Waldimar Amaya, David Domenech +5
Random number generators are essential to ensure performance in information technologies, including cryptography, stochastic simulations and massive data processing. The quality of…
Significant-loophole-free test of Bell's theorem with entangled photons
Marissa Giustina, Marijn A. M. Versteegh, Sören Wengerowsky +19
Local realism is the worldview in which physical properties of objects exist independently of measurement and where physical influences cannot travel faster than the speed of light…
A strong loophole-free test of local realism
Lynden K. Shalm, Evan Meyer-Scott, Bradley G. Christensen +31
We present a loophole-free violation of local realism using entangled photon pairs. We ensure that all relevant events in our Bell test are spacelike separated by placing the parti…
Experimental loophole-free violation of a Bell inequality using entangled electron spins separated by 1.3 km
B. Hensen, H. Bernien, A. E. Dréau +16
For more than 80 years, the counterintuitive predictions of quantum theory have stimulated debate about the nature of reality. In his seminal work, John Bell proved that no theory…
Generation of fresh and pure random numbers for loophole-free Bell tests
Carlos Abellan, Waldimar Amaya, Daniel Mitrani +2
We demonstrate extraction of randomness from spontaneous-emission events less than 36 ns in the past, giving output bits with excess predictability below and strong metro…
Ultra-fast quantum randomness generation by accelerated phase diffusion in a pulsed laser diode
C. Abellan, W. Amaya, M. Jofre +5
We demonstrate a high bit-rate quantum random number generator by interferometric detection of phase diffusion in a gain-switched DFB laser diode. Gain switching at few-GHz frequen…
Measurement of sub-pulse-width temporal delays via spectral interference induced by weak value amplification
Luis Jose Salazar-Serrano, Davide Janner, Nicolas Brunner +2
We demonstrate experimentally a scheme to measure small temporal delays, much smaller than the pulse width, between optical pulses. Specifically, we observe an interference effect,…
Phase-stable source of polarization-entangled photons in a linear double-pass configuration
Fabian Steinlechner, Sven Ramelow, Marc Jofre +5
We demonstrate a compact, robust, and highly efficient source of polarization-entangled photons, based on linear bi-directional down-conversion in a novel 'folded sandwich' configu…
A high-brightness source of polarization-entangled photons optimized for applications in free space
Fabian Steinlechner, Pavel Trojek, Marc Jofre +9
We present a simple but highly efficient source of polarization-entangled photons based on spontaneous parametric down-conversion (SPDC) in bulk periodically poled potassium titany…
True random numbers from amplified quantum vacuum
M. Jofre, M. Curty, F. Steinlechner +4
Random numbers are essential for applications ranging from secure communications to numerical simulation and quantitative finance. Algorithms can rapidly produce pseudo-random outc…
A passive transmitter for quantum key distribution with coherent light
Marcos Curty, Marc Jofre, Valerio Pruneri +1
Signal state preparation in quantum key distribution schemes can be realized using either an active or a passive source. Passive sources might be valuable in some scenarios; for in…
Fast optical source for quantum key distribution based on semiconductor optical amplifiers
M. Jofre, A. Gardelein, G. Anzolin +16
A novel integrated optical source capable of emitting faint pulses with different polarization states and with different intensity levels at 100 MHz has been developed. The source…
100 MHz Amplitude and Polarization Modulated Optical Source for Free-Space Quantum Key Distribution at 850 nm
M. Jofre, A. Gardelein, G. Anzolin +4
We report on an integrated photonic transmitter of up to 100 MHz repetition rate, which emits pulses centered at 850 nm with arbitrary amplitude and polarization. The source is sui…
Space-QUEST: Experiments with quantum entanglement in space
Rupert Ursin, Thomas Jennewein, Johannes Kofler +36
The European Space Agency (ESA) has supported a range of studies in the field of quantum physics and quantum information science in space for several years, and consequently we hav…