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Change of Perspective. Show image information

Change of Perspective.

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

Phone:
+49 5251 60-5899
Fax:
+49 5251 60-5886
Office:
P8.3.11
Visitor:
Pohlweg 47-49
33098 Paderborn
Dr. Benjamin Brecht
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. 

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. 

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

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


Improved non-linear devices for quantum applications

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


Statistical Benchmarking of Scalable Photonic Quantum Systems

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


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), 102


Remotely projecting states of photonic temporal modes

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


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)


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


2019

Experimental Reconstruction of Entanglement Quasiprobabilities

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


2018

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

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


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)


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


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


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


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)


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


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)

<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>


    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


    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


    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)


    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)


    2016

    On-chip generation of photon-triplet states

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


    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


    2015

    Photon Temporal Modes: A Complete Framework for Quantum Information Science

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


    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


    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


    2014

    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


    2013

    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


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

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


    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


    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)


    2011

    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


    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


    A quantum pulse gate based on spectrally engineered sum frequency generation

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


    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


    Open list in Research Information System

    The University for the Information Society