169 citations · 2.5k across the 89 of their papers we have counts for
7 papers · 2 filters
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…
Entanglement-assisted quantum speedup: Beating local quantum speed limits
Farha Yasmin, Jan Sperling
Research in quantum information science aims to surpass the scaling limitations of classical information processing. From a physicist's perspective, performance improvement involve…
Tracking quantum coherence in polariton condensates with time-resolved tomography
Carolin Lüders, Matthias Pukrop, Franziska Barkhausen +6
Long-term quantum coherence constitutes one of the main challenges when engineering quantum devices. However, easily accessible means to quantify complex decoherence mechanisms are…
Detector entanglement: Quasidistributions for Bell-state measurements
Jan Sperling, Ilaria Gianani, Marco Barbieri +1
Measurements in the quantum domain can exceed classical notions. This concerns fundamental questions about the nature of the measurement process itself, as well as applications, su…
Realization of high-fidelity unitary operations on up to 64 frequency bins
Syamsundar De, Vahid Ansari, Jan Sperling +3
The ability to apply user-chosen large-scale unitary operations with high fidelity to a quantum state is key to realizing future photonic quantum technologies. Here, we realize the…
Direct Measurement of Higher-Order Nonlinear Polarization Squeezing
Nidhin Prasannan, Jan Sperling, Benjamin Brecht +1
We report on nonlinear squeezing effects of polarization states of light by harnessing the intrinsic correlations from a polarization-entangled light source and click-counting meas…