Holger Frydrych

Holger Frydrych

Developer, physicist

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About Me

My name is Holger Frydrych. Already at a young age I became fascinated with computers and learned to write my first programs at the age of 9. Ever since, the art of computer programming and software design has been a strong interest of mine. I have a firm understanding of design principles and algorithms and consider myself a versatile programmer.

In an effort to broaden my horizon, I obtained a Master's degree in physics and am currently employed as a research assistant while pursuing a PhD degree in quantum information. I passed my PhD exam in December 2015.

In my free time, I love to play computer games and occasionally develop my own. I have also embarked on a journey to teach myself the guitar.

My Projects

Cheshire Rescue

Cheshire RescueC# Unity

A 48h game project I did with a friend over the winter holidays in 2015. It is based on (a subset of) the rules of the board game Flash Point, a cooperative game where you play as firemen trying to save people from a burning house.

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SectorMania - RTS game prototypePython

SectorMania is a simple and fun real-time strategy game strongly inspired by the classic Z! by the Bitmap Brothers. The current prototype was developed with Python and Pygame. It's been on hold for a while now, but I hope to port and update the prototype to Unity3D in the near future.

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Ogre3D - Open source graphics rendering engineopen sourceC++

Ogre3D is a popular cross-platform 3d graphics rendering engine written in C++. It has been used in several large commercial products. From 2009 to early 2013 I was a programmer and Linux maintainer in the Ogre team and created the current CMake build system.

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Editable Terrain Manager

Editable Terrain Manager for Ogreopen sourceC++

I wrote this component for a 3D terrain editor I was working on. The Editable Terrain Manager can render and modify 2D heightmaps as visual 3D terrain, complete with editable texture splatting support. It has been superceded by Ogre's new Terrain component.

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Research assistant - TU Darmstadt & CROSSING (2011 - Present)

I am currently employed as a research assistant in the quantum optics group of Prof. Dr. Gernot Alber at TU Darmstadt and simultaneously at the collaborative research centre for cryptography-based security solutions, CROSSING.

My primary area of research is quantum information. At CROSSING, I contribute to project P4 (quantum key hubs) to develop scalable quantum cryptography technology. My publications are listed below; I have presented my results at conferences around the world, in Mexico, Switzerland and the Czech Republic. I submitted my PhD thesis in October 2015 and passed my PhD exam in December 2015.

Aside from my own research, I have supervised several BSc students and held lectures in my professor's place on multiple occasions.

Commissioned work

Knights of the Dark Age - ZuxxeZ Entertainment AG (2004 - 2005)

I developed an internet matchmaking server for the multiplayer part of the computer game Knights of the Dark Age. The server was written in C++.

LigaHQ - Gameswelt (2003 - 2004)

I was commissioned to lead the development of a web-based e-sports league system for the German gaming magazine gameswelt.de. The system allowed players to participate in tournaments and leagues in various games. Technologies used were PHP and MySQL. The system ran for several years at www.ligahq.de, but is no longer in service.

Earth 2150: Lost Souls - ZuxxeZ Entertainment AG (2001)

What started as a community-driven addon project for the computer game Earth 2150: The Moon Project, was eventually picked up by ZuxxeZ (now TopWare) for a commercial release as a standalone game. I was part of the community development team. I originally joined as a programmer, but ended up being responsible for story-writing and level design.

Scientific publications

The following publications are a result of my research position in the group of Prof. Dr. Gernot Alber at TU Darmstadt. My research focusses on the topic of dynamical decoupling, a quantum error suppression technique vital to protect quantum computation operations from environmental influences.

Advanced dynamical decoupling strategies for simulating Hamiltonian interactions - PhD Thesis, Technische Universität Darmstadt, D17 (2016)

Holger Frydrych

Pulse-controlled quantum gate sequences on a strongly coupled qubit chain - Phys. Rev. A 92, 062322 (2015)

Holger Frydrych, Michael Marthaler, Gernot Alber

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Suppressing systematic control errors to high orders - Phys. Rev. A 92, 022325 (2015)

Pavel Bažant, Holger Frydrych, Gernot Alber, Igor Jex

Selective dynamical decoupling for quantum state transfer - J. Phys. B: At. Mol. Opt. Phys. 48, 025501 (2015)

Holger Frydrych, Antonín Hoskovec, Gernot Alber, Igor Jex

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Effects of stochastic noise on dynamical decoupling procedures - Phys. Rev. A 89, 062327 (2014)

József Zsolt Bernád, Holger Frydrych

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Constructing Pauli pulse schemes for decoupling and quantum simulation - Phys. Rev. A 89, 022320 (2014)

Holger Frydrych, Gernot Alber, Pavel Bažant

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Centre-of-mass motion-induced decoherence and entanglement generation in a hybrid quantum repeater - J. Phys. B: At. Mol. Opt. Phys. 46, 235501 (2013)

József Zsolt Bernád, Holger Frydrych, Gernot Alber

View on arXiv

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