Thomas Gerrits
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View article: Indistinguishability of arbitrary photons for entanglement generation in scalable quantum networks
Indistinguishability of arbitrary photons for entanglement generation in scalable quantum networks Open
Using a network-compatible source of single photons, we study the interference of heralded signal and idler photons that are not part of the same biphoton pair. We characterize the indistinguishability of such arbitrary single photons that…
View article: Precision channel loss estimation for quantum networks
Precision channel loss estimation for quantum networks Open
Quantum metrology plays a crucial role in characterizing and stabilizing optical channels in a quantum network, where precise estimation of loss is critical for loss-sensitive quantum protocols. Optical fiber channels are the primary mediu…
View article: Picosecond synchronization of mode-locked lasers for metropolitan-scale quantum networks
Picosecond synchronization of mode-locked lasers for metropolitan-scale quantum networks Open
We demonstrate picosecond-level synchronization of two actively mode-locked Ti:Sapphire lasers via the white rabbit precision time protocol (WR-PTP), tested over 120 km of deployed optical fiber. This synchronization capability, in combina…
View article: Crosstalk analysis in quantum networks: detection and localization insights with photon counting OTDR
Crosstalk analysis in quantum networks: detection and localization insights with photon counting OTDR Open
Leveraging pre-existing classical fiber optic infrastructure, particularly optical fibers, and their associated component technologies, is essential for the practical realization of future quantum networks. However, when adapting such infr…
View article: Scalable Time-Tagged Data Acquisition for Entanglement Distribution in Quantum Networks
Scalable Time-Tagged Data Acquisition for Entanglement Distribution in Quantum Networks Open
In distributed quantum applications such as entanglement distribution, precise time synchronization and efficient time-tagged data handling are essential. Traditional systems often suffer from overflow, synchronization drift, and storage i…
View article: Crosstalk Analysis in Quantum Networks: Detection and Localization Insights with photon counting OTDR
Crosstalk Analysis in Quantum Networks: Detection and Localization Insights with photon counting OTDR Open
Optical crosstalk from sub-milliwatt classical-channel power into quantum channels presents a significant challenge in quantum network development, introducing substantial noise that limits the network's performance, scalability, and fidel…
View article: Disseminable single-photon source for quantum radiometry
Disseminable single-photon source for quantum radiometry Open
We present a disseminable single-photon source based on an InGaAs quantum dot in a micro-mesa. This source achieves a maximum photon flux of (2.74 ± 0.03) × 106 photons/s at a wavelength of (929.7 ± 0.1) nm, with a multiphoton suppression …
View article: Investigating Safe Operation Boundaries of Single-Stage Isolation Based Multi-Outlet EV Fast Charging Architecture
Investigating Safe Operation Boundaries of Single-Stage Isolation Based Multi-Outlet EV Fast Charging Architecture Open
Within the next few decades, the rapid de- carbonization of road transport will be crucial in achieving a carbon-neutral future. Fast charging infrastructures for electric vehicles promise a comparable ‘refuel’ time as ICE vehicles, which …
View article: Accurate Unsupervised Photon Counting from Transition Edge Sensor Signals
Accurate Unsupervised Photon Counting from Transition Edge Sensor Signals Open
We compare methods for signal classification applied to voltage traces from transition-edge sensors (TES) which are photon-number resolving detectors fundamental for accessing quantum advantages in information processing, communication and…
View article: Clock synchronization characterization of the Washington DC metropolitan quantum network (DC-QNet)
Clock synchronization characterization of the Washington DC metropolitan quantum network (DC-QNet) Open
Quantum networking protocols relying on interference and precise time-of-flight measurements require high-precision clock synchronization. This study describes the design, implementation, and characterization of two optical time transfer m…
View article: Precisely determining photon-number in real time
Precisely determining photon-number in real time Open
Superconducting transition-edge sensors (TES) are extremely sensitive microcalorimeters used as photon detectors with unparalleled energy resolution. They have found application from measuring astronomical spectra through to determining th…
View article: Synchronized source of indistinguishable photons for quantum networks
Synchronized source of indistinguishable photons for quantum networks Open
We present a source of indistinguishable photons at telecom wavelength, synchronized to an external clock, for the use in distributed quantum networks. We characterize the indistinguishability of photons generated in independent parametric…
View article: Precision Bounds on Continuous-Variable State Tomography Using Classical Shadows
Precision Bounds on Continuous-Variable State Tomography Using Classical Shadows Open
Shadow tomography is a framework for constructing succinct descriptions of quantum states using randomized measurement bases, called “classical shadows,” with powerful methods to bound the estimators used. We recast existing experimental p…
View article: Metropolitan-scale Entanglement Distribution with Co-existing Quantum and Classical Signals in a single fiber
Metropolitan-scale Entanglement Distribution with Co-existing Quantum and Classical Signals in a single fiber Open
The development of prototype metropolitan-scale quantum networks is underway and entails transmitting quantum information via single photons through deployed optical fibers spanning several tens of kilometers. The major challenges in build…
View article: Entangled photon pair generation in an integrated SiC platform
Entangled photon pair generation in an integrated SiC platform Open
Entanglement plays a vital role in quantum information processing. Owing to its unique material properties, silicon carbide recently emerged as a promising candidate for the scalable implementation of advanced quantum information processin…
View article: Single-photon sources and detectors dictionary
Single-photon sources and detectors dictionary Open
The intention of this dictionary is to define relevant terms and metrics used in the characterization of single-photon detectors and sources with the goal to promote better understanding and communication of those metrics across the single…
View article: Entangled photon pair generation in an integrated silicon carbide platform
Entangled photon pair generation in an integrated silicon carbide platform Open
Entanglement plays a vital role in quantum information processing. Owing to its unique material properties, silicon carbide recently emerged as a promising candidate for the scalable implementation of advanced quantum information processin…
View article: Synchronization and coexistence in quantum networks
Synchronization and coexistence in quantum networks Open
We investigate the coexistence of clock synchronization protocols with quantum signals in a common single-mode optical fiber. By measuring optical noise between 1500 nm to 1620 nm we demonstrate a potential for up to 100 quantum, 100 GHz w…
View article: Precision Bounds on Continuous-Variable State Tomography using Classical Shadows
Precision Bounds on Continuous-Variable State Tomography using Classical Shadows Open
Shadow tomography is a framework for constructing succinct descriptions of quantum states using randomized measurement bases, called classical shadows, with powerful methods to bound the estimators used. We recast existing experimental pro…
View article: Picosecond-resolution single-photon time lens for temporal mode quantum processing
Picosecond-resolution single-photon time lens for temporal mode quantum processing Open
Techniques to control the spectro-temporal properties of quantum states of light at ultrafast time scales are crucial for numerous applications in quantum information science. In this work, we report an all-optical time lens for quantum si…
View article: Mixture model analysis of transition edge sensor pulse height spectra
Mixture model analysis of transition edge sensor pulse height spectra Open
To calibrate an optical transition edge sensor, for each pulse of the light source (e.g., pulsed laser), one must determine the ratio of the expected number of photons that deposit energy and the expected number of photons created by the l…
View article: Scalable multiphoton quantum metrology with neither pre- nor post-selected measurements
Scalable multiphoton quantum metrology with neither pre- nor post-selected measurements Open
The quantum statistical fluctuations of electromagnetic fields establish a limit, known as the shot-noise limit, on the sensitivity of optical measurements performed with classical technologies. However, quantum technologies are not constr…
View article: Witnessing the survival of time-energy entanglement through biological tissue and scattering media
Witnessing the survival of time-energy entanglement through biological tissue and scattering media Open
We demonstrate the preservation of the time-energy entanglement of near-IR photons through thick biological media (≤1.55 mm) and tissue (≤ 235 μ m) at room temperature. Using a Franson-type interferometer, we demonstrate interferometric co…
View article: Witnessing the survival of time-energy entanglement through biological\n tissue and scattering media
Witnessing the survival of time-energy entanglement through biological\n tissue and scattering media Open
We demonstrate the preservation of time-energy entanglement of near-IR\nphotons through thick biological media ($\\leq$1.55 mm) and tissue ($\\leq$ 235\n$\\mu$m) at room temperature. Using a Franson-type interferometer, we\ndemonstrate int…