Bachelor- und Masterarbeiten


Experimentell Simulation und Modellierung Theorie




  GaAs sample Cerfontaine

M.Sc.-Arbeit Experimental High-Fidelity Two-Qubit Gates for Spin Qubits

In this project you will work on the experimental demonstration and characterization of a two-qubit gate mediated by the exchange interaction. Using a sophisticated low-temperature (15 mK) measurement setup, you will control two qubits with advanced high-frequency control and readout electronics.
Projektbeschreibung (PDF) Kontakt: Pascal Cerfontaine


Zusätzlich zu den ausgeschriebenen Projekten freuen wir uns immer sehr über Initiativbewerbungen. Bitte kontaktieren Sie hierzu den Gruppenleiter, mit dem Sie arbeiten möchten, um mögliche Projekte zu besprechen.

  Chevron Muster Tom Struck

M.Sc.-Arbeit High fidelity manipulation and detection of a qubit in silicon

In this project you will optimise the control and read-out of a spin qubit in silicon. You will learn working with a sophisticated low-temperature measurement set-up. You will confine single electrons in a quantum dot, manipulate the electron spin by electric dipole spin resonance and improve the qubit control

Projektbeschreibung (PDF) Kontakt: Lars Schreiber

  GaAs sample Rene Otten

M.Sc. Arbeit 3D Integration of Semiconductor Based Spin-Qubits

In this project, you will develop a flip chip process for a 42 qubit device. Large qubit numbers require a high contact density and tight integration with control hardware, both of which can benefit from modern assembly processes. Flip-Chip bonding is a well-established in industry process and will be developed for quantum chips in this project.
Projektbeschreibung (PDF) Kontakt: Rene Otten

  Elektronenmikroskopaufnahme des QuBus Inga Seidler

M.Sc.-Arbeit Fabrikation und Charakterisierung eines Quantum-Bus in Silizium

In diesem Projekt werden Sie einen Elektronspin Quantum-Bus mit Elektronenstrahllitographie an der HNF (FZ Jülich) fabrizieren und bei 10 mK in Transportexperimenten an unserem Institut charakterisieren. Als ersten Schritt werden die Ein-Elektrontransistoren am Ende des QuBus und die Isolation der metallischen Gatter gestestet bevor einzelne Elektronen durch den Bus tranportiert werden können.

Projektbeschreibung (PDF) Kontakt: Lars Schreiber

  Schema eines Doppelquantenpunktes in ZnSe Lars Schreiber

M.Sc.-Arbeit: Richtung Elektronenspin Quantenbits in ZnSe

ZnSe hat ideale Eigenschaften in Hinblick auf Quantumcomputer mit Elektronenspins als Qubits. Bisher jedoch wurde es für diesen Zweck noch nicht näher untersucht. In enger Zusammenarbeit mit Alex Pawlis (FZ Jülich), der Experte im Wachstum von (Zn,Mg)Se Schichten ist, werden Sie elektrische Kontakte auf (Zn,Mg)Se fabrizieren und die Qualität der Heterostrukturen bei 1 K elektrisch messen.

Projektbeschreibung (PDF) Kontakt: Lars Schreiber

  Typical spectra of an InAs quantum dot Kardynal

B.Sc.-Arbeit Dark-field microscopy for resonant excitation of self-assembled quantum dots

In this project, you will develop dark-field optical microscopy setup based on polarization optics. You will use it to characterise properties of the InAs quantum dots under resonant excitation. To achieve this goal you will add the polarization optics in the existing micro-photoluminescence setup and develop an algorithm to align it for a maximum signal to background ratio.
Projektbeschreibung (PDF)



Simulation und Modellierung



Zusätzlich zu den ausgeschriebenen Projekten freuen wir uns immer sehr über Initiativbewerbungen. Bitte kontaktieren Sie hierzu den Gruppenleiter, mit dem Sie arbeiten möchten, um mögliche Projekte zu besprechen.






Zusätzlich zu den ausgeschriebenen Projekten freuen wir uns immer sehr über Initiativbewerbungen. Bitte kontaktieren Sie hierzu den Gruppenleiter, mit dem Sie arbeiten möchten, um mögliche Projekte zu besprechen.

  Nonlinear transmission line Ananda Roy

M.Sc.-Arbeit Quantum state-transfer in nonlinear transmission lines​

Efficient and reliable transfer of quantum states between spatially separated quantum entities is indispensable for quantum information processing. Consider the scenario when information is stored at distant nodes of a network in localized degrees of freedom (atoms and/or resonator modes) and propagating photonic wavepackets serve as carriers of information between these nodes. In this scenario, perfect transfer of a quantum state from one node to another involves tuning the local interactions of the various degrees of freedom at the source to generate an outgoing photonic wavepacket with a specific temporal mode. This temporal mode after propagation along a transmission line or optical fiber is perfectly captured at the destination resonator, thereby accomplishing the task of perfect transfer. Here, we propose an orthogonal approach, where instead of tuning the local degrees of freedom at the different nodes, we engineer the quantum channel serving as the conduit of information to modify the spatio-temporal profile as well as the internal state of the propagating mode. The goal of this project will be to apply inverse scattering method to engineer nonlinear transmission lines that generate desired classical and non-classical states relevant for continuous variable quantum information processing. Contacts: , Fabian Hassler, or David DiVincenzo

  Schema zur Illustration des Hall Effekts David DiVincenzo

B.Sc.-Arbeit Hall Effect Gyrator

This work will continue recent investigations in our group on the action of an essential component in quantum microwave science, the gyrator. Here you will do calculations of the real-time propagation of electromagnetic fields in this device. Contact: David DiVincenzo

  Qubit-Heterostruktur Pascal Cerfontaine

B.Sc.-Arbeit Improved Quantum Dot Qubits

In this project you will explore theoretically variants of the semiconductor quantum dot to perform quantum gate fidelity and readout. There will be an emphasis on tailoring the spin-orbit action to achieve optimal performance, and on varying the electron number and confinement strength. Contact: David DiVincenzo

  Flux Qubit Gianluigi Catelani

B.Sc. and M.Sc. Projects Superconducting Qubits

In these projects you will study theoretically some basic properties (energy levels, wave functions, matrix elements) of superconducting qubits such as the fluxonium and the flux qubit. These properties can be accurately calculated numerically in most cases, especially if the problem reduces to that of a quantum particle in a one-dimensional potential. The goal here is to construct an approximate but accurate analytical solution to such a quantum-mechanical problem, using perturbation theory, the WKB approximation, etc. For a B.Sc. project, a symmetric double-well potential will be analyzed. Extension of the results to asymmetric potentials, and to two- or three-dimensional problems, can be considered for a M.Sc. project. Contact: Gianluigi Catelani (