4 papers · 1 filter
Faster matrix product state preparation by exploiting symmetry-induced block-sparsity
Felix Rupprecht, Sabine Wölk
Matrix product states (MPS) serve as a key tool for studying quantum systems from chemistry and condensed-matter physics, making their preparation on quantum computers an important…
Sparse quantum state preparation with improved Toffoli cost
Felix Rupprecht, Sabine Wölk
The preparation of quantum states is one of the most fundamental tasks in quantum computing, and a key primitive in many quantum algorithms. Of particular interest to areas such as…
Measuring a single atom's position with extreme sub-wavelength resolution and force measurements in the yoctonewton range
P. H. Huber, P. Barthel, Th. Sriarunothai +3
The center-of-mass position of a single trapped atomic ion is measured and tracked in time with high precision. Employing a near-resonant radio frequency field of wavelength 2.37 c…
Optimal distributed sensing in noisy environments
Pavel Sekatski, Sabine Wölk, Wolfgang Dür
We consider distributed sensing of non-local quantities. We introduce quantum enhanced protocols to directly measure any (scalar) field with a specific spatial dependence by placin…