TrapFab – QuantumFrontiers – Leibniz Universität Hannover

This TG is concerned with the development of microfabricated plaforms for atomic quantum systems with applications in quantum computing and sensing.

ACTIVITIES

Establish Regional TrapFab Facility which achieves/improves
- Coating Technology,
- Fine Placement,
- Chip integrated detectors
- Chip integrated light sources
Long-term goal to achieve UHV, hand-held portable device;
Establish spin-offs e.g. ion traps, quantum computing
Support EU project

PUBLICATIONS

Dubielzig T, Halama S, Hahn H, Zarantonello G, Niemann M, Bautista-Salvador A et al. Ultra-low-vibration closed-cycle cryogenic surface-electrode ion trap apparatus. Review of scientific instruments. 2021 Apr 13;92(4). 043201. doi.org/10.1063/5.0024423

Tanaka U, Nakamura M, Hayasaka K, Bautista-Salvador A, Ospelkaus C, Mehlstäubler TE. Creation of double-well potentials in a surface-electrode trap towards a nanofriction model emulator. Quantum Science and Technology. 2021 Mär 5;6(2). 024010. doi.org/10.1088/2058-9565/abe51a

Nordmann T, Didier A, Doležal M, Balling P, Burgermeister T, Mehlstäubler TE. Sub-kelvin temperature management in ion traps for optical clocks. Review of scientific instruments. 2020 Nov 1;91(11). 111301. doi.org/10.1063/5.0024693

Strempel K, Römer F, Yu F, Meneghini M, Bakin A, Wehmann HH et al. Vertical 3D gallium nitride field-effect transistors based on fin structures with inverted p-doped channel. Semiconductor Science and Technology. 2020 Okt 22;36(1). 014002. doi.org/10.1088/1361-6641/abc5ff

Bautista-Salvador A, Zarantonello G, Hahn H, Preciado-Grijalva A, Morgner J, Wahnschaffe M et al. Multilayer ion trap technology for scalable quantum computing and quantum simulation. New journal of physics. 2019 Apr 8;21(4). 043011. doi.org/10.1088/1367-2630/ab0e46

Christ M, Kassner A, Smol R, Bawamia A, Heine H, Herr W et al. Integrated atomic quantum technologies in demanding environments: development and qualification of miniaturized optical setups and integration technologies for UHV and space operation. CEAS Space Journal. 2019 Dez 1;11(4):561-566. doi.org/10.1007/s12567-019-00252-0

Hahn H, Zarantonello G, Schulte M, Bautista-Salvador A, Hammerer K, Ospelkaus C. Integrated ⁹Be⁺ multi-qubit gate device for the ion-trap quantum computer. npj Quantum information. 2019 Aug 16;5(1). 70. doi.org/10.1038/s41534-019-0184-5

Hahn H, Zarantonello G, Bautista-Salvador A, Wahnschaffe M, Kohnen M, Schoebel J et al. Multilayer ion trap with three-dimensional microwave circuitry for scalable quantum logic applications. Applied Physics B: Lasers and Optics. 2019 Jul 31;125(8). 154. doi.org/10.1007/s00340-019-7265-1

Kassner A, Rechel M, Heine H, Herr W, Christ M, Krutzik M et al. Atom chip technology for use under UHV conditions. in Smart Systems Integration 2019: International Conference and Exhibition on Integration Issues of Miniaturized Systems, SSI 2019. VDE Verlag GmbH. 2019. S. 69-75. (Smart Systems Integration 2019 - International Conference and Exhibition on Integration Issues of Miniaturized Systems, SSI 2019).

Zarantonello G, Hahn H, Schulte M, Bautista-Salvador A, Werner RF, Hammerer K et al. Robust and Resource-Efficient Microwave Near-Field Entangling ^{9}Be^{+} Gate. Physical review letters. 2019 Dez 31;123(26):260503. 260503. doi.org/10.1103/PhysRevLett.123.260503

Involved QF Members
Members	Institution	Relevant Expertise
Christian Ospelkaus, Leader	LUH / PTB	Scalable Surface-Electrode Ion Traps; Integrated Microwave and RF Control Elements
Amado Bautista-Salvador	LUH / PTB	Scalable Surface-Electrode Ion Traps
Andreas Waag	TUBS	Coherent Light Field Control; Nanophotonics for Atom and Ion Manipulation; Hybrid integration of GaN LEDs with conductive substrates
Mayra Garcés-Schröder	TUBS	Nanophotonics for Atom and Ion Manipulation
Klaas Strempel	TUBS	Nanophotonics for Atom and Ion Manipulation
Stefanie Kroker	PTB / TUBS	Complex Coupled High Index Waveguide Arrays ; Photonic Nanomaterials in the Strong Optomechanical Coupling Regime
Liam Shelling-Neto	PTB / TUBS	Complex Coupled High Index Waveguide Arrays
Tanja Mehlstäubler	PTB / LUH	Dynamics of ion Coulomb Crystals; Integrated Chip Traps and Optical Components
Daniel Bennett	PTB	Integrated Chip Traps and Optical Components
Dietmar Kracht	LZH	Advanced Light Sources; Precision Additive Manufacturing of Quantum Sensors; High power solid-state single frequency amplifiers
Christian Zander / Christian Hoff	LZH	Precision Additive Manufacturing of Quantum Sensors
Boris Chichkov	LUH	Nanoscale Materials Processing
Ulf Hinze	LUH	Nanoscale Materials Processing
New W1	TUBS	Photonic Electronic Hybrid Integration
Marc Christopher Wurz	LUH	Development of compact vacuum pumps, pressure measruement devices and miniaturized Rb sources; Atom-Chip Based Gravimeters and Inertial Sensors
Alexander Kassner	LUH	Atom-Chip Based Gravimeters and Inertial Sensors
Ernst M. Rasel	LUH	Quantum Gravimeters; Atom-Chip Based Gravimeters and Inertial Sensors
Milutin Kovacev	LUH	Enhanced Optical Nonlinearities and High-Harmonic Generation
Philip Mosel	LUH	Enhanced Optical Nonlinearities and High-Harmonic Generation

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