A5074974641- Advanced Frequency and Time Standards
- Cold Atom Physics and Bose-Einstein Condensates
- Spectroscopy and Laser Applications
- Atomic and Subatomic Physics Research
- Atomic and Molecular Physics
- Cardiovascular Syncope and Autonomic Disorders
- Advanced Chemical Physics Studies
- Quantum Mechanics and Applications
- Quantum Computing Algorithms and Architecture
- Quantum Information and Cryptography
- Healthcare Technology and Patient Monitoring
- Methane Hydrates and Related Phenomena
- Network Time Synchronization Technologies
- Ion-surface interactions and analysis
- Molecular Spectroscopy and Structure
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Laser Technologies
Heinrich Heine University Düsseldorf
2012-2024
Institute for Experimental Psychophysiology (Germany)
2020
The use of ultra-precise optical clocks in space ("master clocks") will allow for a range new applications the fields fundamental physics (tests Einstein's theory General Relativity, time and frequency metrology by means comparison distant terrestrial clocks), geophysics (mapping gravitational potential Earth), astronomy (providing local oscillators radio ranging interferometry space). Within ELIPS-3 program ESA, "Space Optical Clocks" (SOC) project aims to install operate an lattice clock...
We have demonstrated a compact, robust device for simultaneous absolute frequency stabilization of three diode lasers whose carrier frequencies can be chosen freely relative to the reference. A rigid ULE multicavity block is employed, and, each laser, sideband locking technique applied. small lock error, computer control offset, wide range simple construction, and operation are useful features system. One concrete application as unit cooling trapping neutral-atom lattice clock. The...
The use of ultra-precise optical clocks in space ("master clocks") will allow for a range new applications the fields fundamental physics (tests Einstein's theory General Relativity, time and frequency metrology by means comparison distant terrestrial clocks), geophysics (mapping gravitational potential Earth), astronomy (providing local oscillators radio ranging interferometry space). Within ELIPS-3 program ESA, "Space Optical Clocks" (SOC) project aims to install operate an lattice clock...
Das Wasserstoffmolekülion (H 2 + ) und seine Isotopologe sind die einfachsten Moleküle. Sie bestehen lediglich aus zwei Kernen – Proton, Deuteron oder Triton gebunden über ein einziges Elektron. Unserer Arbeitsgruppe ist es nun gelungen, Übergangsfrequenzen zwischen Schwingungszuständen dieser Moleküle hochgenau zu vermessen damit Quantenmechanik testen. Vereint mit einer hochpräzisen Theorie lässt sich spektroskopischer Wert für das Proton‐Elektron‐Massenverhältnis ableiten: 1836,152 673 463(37) 1.
Within the ELIPS program of ESA, "Space Optical Clocks" (SOC) project aims to install and operate an optical lattice clock on ISS towards end this decade. In two accurate transportable demonstrators having relative frequency instability below 1×10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-15</sup> at 1 s integration time inaccuracy 5×10 xmlns:xlink="http://www.w3.org/1999/xlink">-17</sup> are under development. Crucial requirements...
We propose a scheme for the secure direct communication based on entangled phase-coherent states, which shows an elevated level of confidentiality. The protocol gives simultaneous security control every bit transferred information. security-check-per-bit is provided by sending additional mode to prove legitimate parties' authenticity. Other benefit include increased transfer rate, since separate sequences unnecessary. study both ideal and realistic quantum channel. robust prepares 50%...
The understanding of the quantum nature atoms and molecules may be tested by comparing accurate theoretical ab-initio predictions with results precision spectroscopy experiments. A comparison based on molecular hydrogen ions, simplest three-body systems, exploited also to determine values a set fundamental constants search for any deviation nucleus-nucleus interaction from Coulomb force. Achieving improvements in these compared state-of-the-art is challenging task both experimental sides.