344 citations · 614 across the 9 of their papers we have counts for
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Time Averaged Density Matrix as an Optimization Problem
Volckmar Nebendahl
A new method is presented which allows time averaged density matrices of closed quantum systems to be computed via a constraint overlap maximization. Due to its simplicity, this me…
Optimized Quantum Error Correction Codes for Experiments
V. Nebendahl
We identify gauge freedoms in quantum error correction (QEC) codes and introduce strategies for optimal control algorithms to find the gauges which allow the easiest experimental r…
A quantum information processor with trapped ions
Philipp Schindler, Daniel Nigg, Thomas Monz +10
Quantum computers hold the promise to solve certain problems exponentially faster than their classical counterparts. Trapped atomic ions are among the physical systems in which bui…
Improved numerical methods for infinite spin chains with long-range interactions
V. Nebendahl, W. Dür
We present several improvements of the infinite matrix product state (iMPS) algorithm for finding ground states of one-dimensional quantum systems with long-range interactions. As…
Tensor operators: constructions and applications for long-range interaction systems
F. Fröwis, V. Nebendahl, W. Dür
We consider the representation of operators in terms of tensor networks and their application to ground-state approximation and time evolution of systems with long-range interactio…
Concatenated tensor network states
R. Hübener, V. Nebendahl, W. Dür
We introduce the concept of concatenated tensor networks to efficiently describe quantum states. We show that the corresponding concatenated tensor network states can efficiently d…
Optimal control of entangling operations for trapped ion quantum computing
V. Nebendahl, H. Haffner, C. F. Roos
Optimal control techniques are applied for the decomposition of unitary quantum operations into a sequence of single-qubit gates and entangling operations. To this end, we modify a…
Geometric phase gate on an optical transition for ion trap quantum computation
K. Kim, C. F. Roos, L. Aolita +3
We propose a geometric phase gate of two ion qubits that are encoded in two levels linked by an optical dipole-forbidden transition. Compared to hyperfine geometric phase gates med…