activity
20232026
collaborators

6 papers

quant-ph2026

Efficient Fault-Tolerant Ancilla Preparation for Quantum BCH codes via Cyclic Symmetry

Kohei Yamamoto, Keisuke Fujii

One of the major challenges in realizing fault-tolerant quantum computers (FTQCs) is the requirement for a large number of physical qubits. To address this issue, high-rate quantum…

physics.optics2025

Experimental Demonstration of an On-Axis Laser Ranging Interferometer for Future Gravity Missions

Daikang Wei, Christoph Bode, Kohei Yamamoto +6

We experimentally demonstrate a novel interferometric architecture for next-generation gravity missions, featuring a laser ranging interferometer (LRI) that enables monoaxial trans…

astro-ph.IM2025

Observable-based reformulation of time-delay interferometry

Kohei Yamamoto, Jan Niklas Reinhardt, Olaf Hartwig

Spaceborne gravitational-wave observatories utilize a postprocessing technique known as time-delay interferometry (TDI) to reduce the otherwise overwhelming laser frequency noise b…

astro-ph.IM2024

Experimental end-to-end demonstration of intersatellite absolute ranging for LISA

Kohei Yamamoto, Iouri Bykov, Jan Niklas Reinhardt +10

The Laser Interferometer Space Antenna (LISA) is a gravitational wave detector in space. It relies on a post-processing technique named time-delay interferometry (TDI) to suppress…

gr-qc2024

Time-delay interferometry with onboard optical delays

Jan Niklas Reinhardt, Philipp Euringer, Olaf Hartwig +3

Time-delay interferometry (TDI) is a data processing technique for space-based gravitational-wave detectors to create laser-noise-free equal-optical-path-length interferometers vir…

physics.optics2023

Single-Element Dual-Interferometer for Precision Inertial Sensing: Sub-picometer Structural Stability and Performance as a Reference for Laser Frequency Stabilization

Victor Huarcaya, Miguel Dovale Álvarez, Kohei Yamamoto +7

To reach sub-picometer sensitivity in the millihertz range, displacement sensors based on laser interferometry require suppression of laser-frequency noise by several orders of mag…