Dr. Mustafa Gündogan

Dr. Gündogan entwickelt portable Quantenspeicher-Systeme auf Basis von Cäsium-Dampf, die optische Quanteninformation bei Raumtemperatur speichern und abrufen können. Diese Technologie adressiert ein Kernproblem globaler Quantenkommunikationsnetze: den exponentiellen Photonenverlust über große Distanzen. Durch die Kombination von Quantenspeichern mit Quantenrepeatern — insbesondere in Satelliten-Szenarien — ermöglicht seine Arbeit erstmals praktisch realisierbare, weltweite Quantenkommunikationsinfrastrukturen für sichere Datenübertragung und zukünftige Quanteninternet-Anwendungen. Aktuell konzentriert er sich auf die Optimierung dieser Speicher-Systeme für Feldanwendungen, die Demonstration von Sensing-Anwendungen (z. B. hochempfindliche Geschwindigkeitsmessungen) und die Erforschung fundamentaler Grenzen von Photonen-Speicherung.

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• Verbesserte Atomare Quantenspeicher durch Dynamische Anpassung der Dichte

  Quelle ↗

  Förderer: Einstein Postdoctoral Grant Zeitraum: 01/2026 - 12/2029 Projektleitung: Prof. Dr. Markus Krutzik, Dr. Mustafa Gündogan

• AEDGE: Atomic Experiment for Dark Matter and Gravity Exploration in Space

  2020

  EPJ Quantum Technology · DOI

  Abstract We propose in this White Paper a concept for a space experiment using cold atoms to search for ultra-light dark matter, and to detect gravitational waves in the frequency range between the most sensitive ranges of LISA and the terrestrial LIGO/Virgo/KAGRA/INDIGO experiments. This interdisciplinary experiment, called Atomic Experiment for Dark Matter and Gravity Exploration (AEDGE), will also complement other planned searches for dark matter, and exploit synergies with other gravitational wave detectors. We give examples of the extended range of sensitivity to ultra-light dark matter offered by AEDGE, and how its gravitational-wave measurements could explore the assembly of super-massive black holes, first-order phase transitions in the early universe and cosmic strings. AEDGE will be based upon technologies now being developed for terrestrial experiments using cold atoms, and will benefit from the space experience obtained with, e.g., LISA and cold atom experiments in microgravity. KCL-PH-TH/2019-65, CERN-TH-2019-126

• Strain engineering of the silicon-vacancy center in diamond

  2018

  Physical review. B./Physical review. B · DOI

  Here, the authors tune the color of light emitted by single-atom imperfections (silicon vacancy color centers) inside a diamond. Such tunable imperfections can be networked together to build a quantum internet, where information can be securely exchanged using the laws of quantum physics. One problem is that all the centers need to emit at precisely the same color or wavelength. The authors overcome this challenge by placing color centers inside a diamond nanostring. By adjusting the tension in the string, atoms are stretched inside the crystal and tune the center to emit photons of a desired wavelength. The tuning method involves bending the string with a force controlled handily with an electrical voltage. A symphony of such tunable diamond strings could serve as the backbone of a future quantum internet.