Achtung:

Sie haben Javascript deaktiviert!
Sie haben versucht eine Funktion zu nutzen, die nur mit Javascript möglich ist. Um sämtliche Funktionalitäten unserer Internetseite zu nutzen, aktivieren Sie bitte Javascript in Ihrem Browser.

A chance for life. Start your studies in Paderborn now: www.uni-paderborn.de/en/zv/3-3/formalities

Photo: Paderborn University

Dr. Benjamin Brecht

Contact
Biography
Publications
Dr. Benjamin Brecht

Integrated Quantum Optics

Academic Senior Councillor - Group leader "Quantum Networks"

Institute for photonic quantum systems (PhoQS)

Manager - Academic Senior Councillor - Management

Phone:
+49 5251 60-5899
Fax:
+49 5251 60-5886
Office:
ST0.335
Dr. Benjamin Brecht
07/2022 - today

Co-Investigator of the QuantERA Project E2TPA

The E2TPA (Exploiting Entangled Two-Photon Absorption) project aims to understand and harness the physics behind the interaction of entangled quantum light and molecules. Within the project, we are developing customised quantum light sources for entangled two-photon absorption together with our national and international partners. I am leading and coordinating the research at the Paderborn site.

03/2021 - today

Manager of the Institute for Photonic Quantum Systems (PhoQS)

The interdisciplinary Institute for Photonic Quantum Systems (PhoQS) aims to combine expertise from the areas of experimental and theoretical physics, computer science, electrical engineering, and mathematics to realise photonic quantum technologies for applications in the emerging fields of quantum communications, quantum metrology and sensing, quantum simulations, and quantum computing. 

10/2020 - today

Co-Investigator of the EU HORIZON2020 FET-OPEN Project STORMYTUNE

STORMYTUNE (Spectral-temporal metrology with tailored quantum measurements) explores novel ways to improve the performance of spectroscopy techniques by using quantum measurements. As co-coordinator of the project, I am the scientific contact point for the EU. Further, I am responsible for the day to day coordination of the consortium and am leading the research efforts in Paderborn.

10/2020 - today

Co-Investigator of the QuantERA Project ApresSF

In ApresSF (Application-ready superresolution in space and frequency), we aim to improve superresolving measurements and to bring them closer to industrial application. I am leading the research efforts in Paderborn, which focus on the continuous improvement of time-frequency measurements.

10/2018 - today

Deputy Senate Speaker of Paderborn University

06/2018 - today

Group leader "Quantum Networks" at Paderborn University

The "Quantum Networks" group is part of the Silberhorn group. We are interested in the generation, manipulation, and utilization of quantum light in different areas of application. Examples include quantum simulations based on time-multiplexed quantum walks, ultra-precise time-frequency metrology, and high-dimensional time-frequency quantum communications. 

10/2015 - 09/2018

Co-Investigator of the EU FP7 FET-OPEN Project QCUMbER

In QCUMbER (Quantum-controlled ultrafast multimode entanglement and measurement), we investigated the utilisation of the spectral-temporal structure of quantum light. Part of my contribution to the project was the day to day coordination during my time in Oxford.

05/2015 - 05/2018

Postdoc at the University of Oxford, UK

Work on quantum memories in warm caesium vapour in the group of Prof Ian A. Walmsley. During my time we invented, patented and deployed a novel memory protocol - ORCA - for the storage and retrieval of heralded single photons. 

04/2014 - 04/2015

Postdoc at Paderborn University

Work on the time-frequency manipulation of quantum light

08/2009 - 03/2014

Doctoral thesis at the Max Planck Institute for the Science of Light and the Paderborn University

Thesis title: Engineering ultrafast quantum frequency conversion

07/2008 - 07/2009

Physics diploma at the FAU Erlangen-Nuremberg

Title of the diploma thesis: Generation of decorrelated photon pairs in photonic crystal fibres


Open list in Research Information System

2021

Effects of coherence on temporal resolution

S. De, J. Gil López, B. Brecht, C. Silberhorn, L.L. Sánchez-Soto, Z. Hradil, J. Řeháček, Physical Review Research (2021), 3(3), 033082

DOI


Achieving the Ultimate Quantum Timing Resolution

V. Ansari, B. Brecht, J. Gil-Lopez, J.M. Donohue, J. Řeháček, Z. Hradil, L.L. Sánchez-Soto, C. Silberhorn, PRX Quantum (2021), 2, 010301

DOI


Statistical Benchmarking of Scalable Photonic Quantum Systems

J. Tiedau, M. Engelkemeier, B. Brecht, J. Sperling, C. Silberhorn, Physical Review Letters (2021), 126, 023601

DOI


Continuous variable multimode quantum states via symmetric group velocity matching

V. Roman-Rodriguez, B. Brecht, K. Srinivasan, C. Silberhorn, N. Treps, E. Diamanti, V. Parigi, New Journal of Physics (2021), 23, 043012

DOI


Improved non-linear devices for quantum applications

J. Gil López, M. Santandrea, G. Roland, B. Brecht, C. Eigner, R. Ricken, V. Quiring, C. Silberhorn, New Journal of Physics (2021), 063082

DOI


Experimental entanglement characterization of two-rebit states

N. Prasannan, S. De, S. Barkhofen, B. Brecht, C. Silberhorn, J. Sperling, Physical Review A (2021), 103

DOI


Experimental entanglement characterization of two-rebit states

N. Prasannan, S. De, S. Barkhofen, B. Brecht, C. Silberhorn, J. Sperling, Physical Review A (2021), 103

DOI


Statistical Benchmarking of Scalable Photonic Quantum Systems

J. Tiedau, M. Engelkemeier, B. Brecht, J. Sperling, C. Silberhorn, Physical Review Letters (2021), 126

DOI


Universal compressive tomography in the time-frequency domain

J. Gil López, Y.S. Teo, S. De, B. Brecht, H. Jeong, C. Silberhorn, L.L. Sánchez-Soto, Optica (2021), 1296

DOI


2020

Quantum photonics with active feedback loops

M. Engelkemeier, L. Lorz, S. De, B. Brecht, I. Dhand, M.B. Plenio, C. Silberhorn, J. Sperling, Physical Review A (2020)

DOI


Pulse shaping using dispersion-engineered difference frequency generation

M. Allgaier, V. Ansari, J.M. Donohue, C. Eigner, V. Quiring, R. Ricken, B. Brecht, C. Silberhorn, Physical Review A (2020), 101, 043819

DOI


Quantum photonics with active feedback loops

M. Engelkemeier, L. Lorz, S. De, B. Brecht, I. Dhand, M.B. Plenio, C. Silberhorn, J. Sperling, Physical Review A (2020), 102, 023712

DOI


Remotely projecting states of photonic temporal modes

V. Ansari, J.M. Donohue, B. Brecht, C. Silberhorn, Optics Express (2020), 28(19), 28295-28305

DOI


Spatially single mode photon pair source at 800 nm in periodically poled Rubidium exchanged KTP waveguides

C. Eigner, L. Padberg, M. Santandrea, H. Herrmann, B. Brecht, C. Silberhorn, Optics Express (2020), 28(22), 32925-32935

DOI


Spatial entanglement and state engineering via four-photon Hong–Ou–Mandel interference

A. Ferreri, V. Ansari, B. Brecht, C. Silberhorn, P.R. Sharapova, Quantum Science and Technology (2020), 5(4), 045020

DOI


Optimizing spontaneous parametric down-conversion sources for boson sampling

R. van der Meer, J.J. Renema, B. Brecht, C. Silberhorn, P.W.H. Pinkse, Physical Review A (2020), 101(6), 063821

DOI


2019

Experimental Reconstruction of Entanglement Quasiprobabilities

J. Sperling, E. Meyer-Scott, S. Barkhofen, B. Brecht, C. Silberhorn, Physical Review Letters (2019)

DOI


Experimental Reconstruction of Entanglement Quasiprobabilities

J. Sperling, E. Meyer-Scott, S. Barkhofen, B. Brecht, C. Silberhorn, Physical Review Letters (2019), 122, 053602

DOI


2018

Tomography and Purification of the Temporal-Mode Structure of Quantum Light

V. Ansari, J.M. Donohue, M. Allgaier, L. Sansoni, B. Brecht, J. Roslund, N. Treps, G. Harder, C. Silberhorn, Physical Review Letters (2018), 120, 213601

DOI


Tailoring nonlinear processes for quantum optics with pulsed temporal-mode encodings

V. Ansari, J.M. Donohue, B. Brecht, C. Silberhorn, Optica (2018), 5(5), 534-550

DOI


Streak camera imaging of single photons at telecom wavelength

M. Allgaier, V. Ansari, C. Eigner, V. Quiring, R. Ricken, J.M. Donohue, T. Czerniuk, M. Aßmann, M. Bayer, B. Brecht, C. Silberhorn, Applied Physics Letters (2018), 112, 031110

DOI


Streak camera imaging of single photons at telecom wavelength

M. Allgaier, V. Ansari, C. Eigner, V. Quiring, R. Ricken, J.M. Donohue, T. Czerniuk, M. Aßmann, M. Bayer, B. Brecht, C. Silberhorn, Applied Physics Letters (2018), 031110

DOI


2017

Temporal-mode measurement tomography of a quantum pulse gate

V. Ansari, G. Harder, M. Allgaier, B. Brecht, C. Silberhorn, Physical Review A (2017), 96, 063817

DOI


Fast time-domain measurements on telecom single photons

M. Allgaier, G. Vigh, V. Ansari, C. Eigner, V. Quiring, R. Ricken, B. Brecht, C. Silberhorn, Quantum Science and Technology (2017), 2, 034012

DOI


Harnessing temporal modes for multi-photon quantum information processing based on integrated optics

G. Harder, V. Ansari, T. Bartley, B. Brecht, C. Silberhorn, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences (2017), 375(2099), 20160244

<jats:p>In the last few decades, there has been much progress on low loss waveguides, very efficient photon-number detectors and nonlinear processes. Engineered sum-frequency conversion is now at a stage where it allows operation on arbitrary temporal broadband modes, thus making the spectral degree of freedom accessible for information coding. Hereby the information is often encoded into the temporal modes of a single photon. Here, we analyse the prospect of using multi-photon states or squeezed states in different temporal modes based on integrated optics devices. We describe an analogy between mode-selective sum-frequency conversion and a network of spatial beam splitters. Furthermore, we analyse the limits on the achievable squeezing in waveguides with current technology and the loss limits in the conversion process.</jats:p> <jats:p>This article is part of the themed issue ‘Quantum technology for the 21st century’.</jats:p>


Highly efficient frequency conversion with bandwidth compression of quantum light

M. Allgaier, V. Ansari, L. Sansoni, C. Eigner, V. Quiring, R. Ricken, G. Harder, B. Brecht, C. Silberhorn, Nature Communications (2017), 8, 14288

DOI


Highly efficient frequency conversion with bandwidth compression of quantum light

M. Allgaier, V. Ansari, L. Sansoni, C. Eigner, V. Quiring, R. Ricken, G. Harder, B. Brecht, C. Silberhorn, Nature Communications (2017), 14288

DOI


A monolithic, doubly-resonant parametric down-conversion source for Caesium Raman memories

B. Brecht, O. Lazo-Arjona, K.T. Kaczmarek, T. Parker, R. Ricken, V. Quiring, C. Eigner, K.H. Luo, H. Herrmann, C. Silberhorn, I.A. Walmsley, in: Frontiers in Optics 2017, 2017

DOI


Fast time-domain measurements on telecom single photons

M. Allgaier, G. Vigh, V. Ansari, C. Eigner, V. Quiring, R. Ricken, B. Brecht, C. Silberhorn, Quantum Science and Technology (2017), 034012

DOI


Harnessing temporal modes for multi-photon quantum information processing based on integrated optics

G. Harder, V. Ansari, T. Bartley, B. Brecht, C. Silberhorn, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences (2017), 20160244

DOI


2016

A versatile design for resonant guided-wave parametric down-conversion sources for quantum repeaters

B. Brecht, K. Luo, H. Herrmann, C. Silberhorn, Applied Physics B (2016), 122, pp. 116

DOI


On-chip generation of photon-triplet states

S. Krapick, B. Brecht, H. Herrmann, V. Quiring, C. Silberhorn, Optics Express (2016), 24(3), 2836-2849

DOI


2015

Uncovering Quantum Correlations with Time-Multiplexed Click Detection

J. Sperling, M. Bohmann, W. Vogel, G. Harder, B. Brecht, V. Ansari, C. Silberhorn, Physical Review Letters (2015)

DOI


Photon Temporal Modes: A Complete Framework for Quantum Information Science

B. Brecht, D.V. Reddy, C. Silberhorn, M. Raymer, Physical Review X (2015), 5, 041017

DOI


Direct generation of genuine single-longitudinal-mode narrowband photon pairs

K. Luo, H. Herrmann, S. Krapick, B. Brecht, R. Ricken, V. Quiring, H. Suche, W. Sohler, C. Silberhorn, New Journal of Physics (2015), 17, 073039

DOI


Uncovering Quantum Correlations with Time-Multiplexed Click Detection

J. Sperling, M. Bohmann, W. Vogel, G. Harder, B. Brecht, V. Ansari, C. Silberhorn, Physical Review Letters (2015), 115, 023601

DOI


2014

Bright integrated photon-pair source for practical passive decoy-state quantum key distribution

S. Krapick, M. Stefszky, M. Jachura, B. Brecht, M. Avenhaus, C. Silberhorn, Physical Review A (2014)

DOI


Demonstration of coherent time-frequency Schmidt mode selection using dispersion-engineered frequency conversion

B. Brecht, A. Eckstein, R. Ricken, V. Quiring, H. Suche, L. Sansoni, C. Silberhorn, Physical Review A (2014), 90, 030302(R)

DOI


2013

An optimized photon pair source for quantum circuits

G. Harder, V. Ansari, B. Brecht, T. Dirmeier, C. Marquardt, C. Silberhorn, Optics Express (2013), 21(12), 13975-13985

DOI


Theory of quantum frequency conversion and type-II parametric down-conversion in the high-gain regime

A. Christ, B. Brecht, W. Mauerer, C. Silberhorn, New Journal of Physics (2013), 15, 053038

DOI


Characterizing entanglement in pulsed parametric down-conversion using chronocyclic Wigner functions

B. Brecht, C. Silberhorn, Physical Review A (2013), 87, 053810

DOI


An efficient integrated two-color source for heralded single photons

S. Krapick, H. Herrmann, V. Quiring, B. Brecht, H. Suche, C. Silberhorn, New Journal of Physics (2013), 15, 033010

DOI


2011

From quantum pulse gate to quantum pulse shaper—engineered frequency conversion in nonlinear optical waveguides

B. Brecht, A. Eckstein, A. Christ, H. Suche, C. Silberhorn, New Journal of Physics (2011), 13, 065029

DOI


A quantum pulse gate based on spectrally engineered sum frequency generation

A. Eckstein, B. Brecht, C. Silberhorn, Optics Express (2011), 19(15), 13770-13778

DOI


Controlling the correlations in frequency upconversion in PPLN and PPKTP waveguides

B. Brecht, A. Eckstein, C. Silberhorn, physica status solidi (c) (2011), 8(4), pp. 1235-1238

DOI


2010

Bridging visible and telecom wavelengths with a single-mode broadband photon pair source

C. Söller, B. Brecht, P.J. Mosley, L.Y. Zang, A. Podlipensky, N.Y. Joly, P.S.J. Russell, C. Silberhorn, Physical Review A (2010), 81, 031801(R)

DOI


Open list in Research Information System

The University for the Information Society