151 citations · 428 across the 18 of their papers we have counts for
19 papers
Plaquette: A hardware-aware design platform for fault-tolerant quantum computers
Raul Conchello Vendrell, Carlos Díaz López, Ish Dhand +12
Hardware teams building fault-tolerant quantum computers (FTQCs) must decide which imperfections to suppress, and that decision requires the logical performance of the architecture…
Boosted Bell-state measurements for photonic quantum computation
Nico Hauser, Matthias J. Bayerbach, Simone E. D'Aurelio +5
Fault-tolerant fusion-based photonic quantum computing (FBQC) greatly relies on entangling two-photon measurements, called fusions. These fusions can be realized using linear-optic…
Measurement of ultrashort bi-photon correlation times with an integrated two-colour broadband SU(1,1)-interferometer
F. Roeder, R. Pollmann, M. Stefszky +7
The bi-photon correlation time, a measure for the conditional uncertainty in the temporal arrival of two photons from a photon pair source, is a key performance identifier for many…
Lossy SU(1,1) interferometers in the single-photon-pair regime
Matteo Santandrea, Kai-Hong Luo, Michael Stefszky +3
The success of quantum technologies is intimately connected to the possibility of using them in real-world applications. To this aim, we study the sensing capabilities of quantum S…
Quantum optical coherence: From linear to nonlinear interferometers
K. -H. Luo, M. Santandrea, M. Stefszky +6
Interferometers provide a highly sensitive means to investigate and exploit the coherence properties of light in metrology applications. However, interferometers come in various fo…
Improved non-linear devices for quantum applications
Jano Gil-Lopez, Matteo Santandrea, Benjamin Brecht +4
In this paper, we review the state of the art of mode selective, integrated sum-frequency generation devices tailored for quantum optical technologies. We explore benchmarks to ass…
Spectrally multimode integrated SU(1,1) interferometer
Alessandro Ferreri, Matteo Santandrea, Michael Stefszky +4
Nonlinear SU(1,1) interferometers are fruitful and promising tools for spectral engineering and precise measurements with phase sensitivity below the classical bound. Such interfer…
Waveguide Resonator with Integrated Phase Modulator for Second Harmonic Generation
Michael Stefszky, Matteo Santandrea, Felix vom Bruch +6
We report second harmonic generation from a titanium indiffused lithium niobate waveguide resonator device whose cavity length is locked to the fundamental pump laser using an on-c…
General analytic theory of classical collinear three wave mixing in a monolithic cavity
Matteo Santandrea, Michael Stefszky, Christine Silberhorn
Integrated, monolithic nonlinear cavities are of high interest in both classical and quantum optics experiments for their high efficiency and stability. However, a general, analyti…
Evidence of nonlinear diffusion in KTP waveguides
Laura Padberg, Matteo Santandrea, Michael Rüsing +6
Integrated devices are a widespread tool for the generation and manipulation of light fields, since they exhibit high efficiency, small footprint and the ability to inter…
Cryogenic second harmonic generation in periodically-poled lithium niobate waveguides
Moritz Bartnick, Matteo Santandrea, Jan Philipp Hoepker +7
Prospective integrated quantum optical technologies will combine nonlinear optics and components requiring cryogenic operating temperatures. Despite the prevalence of integrated pl…
Counter-propagating photon pair generation in a nonlinear waveguide
Kai-Hong Luo, Vahid Ansari, Marcello Massaro +5
Counter-propagating parametric conversion processes in non-linear bulk crystals have been shown to feature unique properties for efficient narrowband frequency conversion. In quant…
An interferometric method for determining the losses of spatially multi-mode nonlinear waveguides based on second harmonic generation
Matteo Santandrea, Michael Stefszky, Ganaël Roeland +1
The characterisation of loss in optical waveguides is essential in understanding the performance of these devices and their limitations. Whilst interferometric-based methods genera…
Characterisation of Inhomogeneities in Ti:LiNbO waveguides
Matteo Santandrea, Michael Stefszky, Ganaël Roeland +1
Nonlinear processes in integrated, guiding systems are fundamental for both classical and quantum experiments. Integrated components allow for compact, modular and stable light-pro…
General framework for the analysis of imperfections in nonlinear systems
Matteo Santandrea, Michael Stefszky, Christine Silberhorn
In this paper, we derive a framework to understand the effect of imperfections on the phasematching spectrum of a wide class of nonlinear systems. We show that this framework is ap…
Fabrication limits of waveguides in nonlinear crystals and their impact on quantum optics applications
Matteo Santandrea, Michael Stefszky, Vahid Ansari +1
Waveguides in nonlinear materials are a key component for photon pair sources and offer promising solutions to interface quantum memories through frequency conversion. To bring the…
Heralded generation of high-purity ultrashort single photons in programmable temporal shapes
Vahid Ansari, Emanuele Roccia, Matteo Santandrea +9
We experimentally demonstrate a source of nearly pure single photons in arbitrary temporal shapes heralded from a parametric down-conversion (PDC) source at telecom wavelengths. Th…
Towards integrated superconducting detectors on lithium niobate waveguides
Jan Philipp Höpker, Moritz Bartnick, Evan Meyer-Scott +15
Superconducting detectors are now well-established tools for low-light optics, and in particular quantum optics, boasting high-efficiency, fast response and low noise. Similarly, l…
Experimental Perfect Quantum State Transfer
Robert J. Chapman, Matteo Santandrea, Zixin Huang +5
The transfer of data is a fundamental task in information systems. Microprocessors contain dedicated data buses that transmit bits across different locations and implement sophisti…