66 citations · 450 across the 40 of their papers we have counts for
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Symplectic Split-Operator Propagators from Tridiagonalized Multi-Mode Bosonic Hilbert Spaces for Bose-Hubbard Hamiltonians
Denys I. Bondar, Ole Steuernagel
In this methods paper, we show how to tridia\-go\-nalize two families of bosonic multimode systems: optomechanical and Bose-Hubbard hamiltonians. Using tools from number theory, we…
A Sensitive Quantumness Measure for One-Dimensional Continuous-Variable Systems
Ole Steuernagel, Hsien-Yi Hsieh, Yi-Ru Chen +1
For one-dimensional continuous-variable quantum systems such as single-mode quantum optical systems, we give a quantification of the quantumness of such a system's state, ρ, by int…
Wigner's Phase Space Current for Variable Beam Splitters -Seeing Beam Splitters in a New Light-
Ole Steuernagel, Ray-Kuang Lee
Beam splitters allow us to superpose two continuous single mode quantum systems. To study the behaviour of their strongly mode mixing dynamics we consider variable beam splitters a…
Lindblad Superoperators from Wigner's Phase Space Continuity Equation
Ole Steuernagel, Ray-Kuang Lee
For a simple quantum system weakly interacting with the environment Wigner's 1932 formulation of quantum physics can be used to derive coupling to the environment using simple alge…
Generation of heralded optical `Schroedinger cat' states by photon-addition
Yi-Ru Chen, Hsien-Yi Hsieh, Jingyu Ning +7
Optical "Schrödinger cat" states, the non-classical superposition of two quasi-classical coherent states, serve as a basis for gedanken experiments testing quantum physics on mesos…
Exponential unitary integrators for nonseparable quantum Hamiltonians
Maximilian Ciric, Denys I. Bondar, Ole Steuernagel
Quantum Hamiltonians containing nonseparable products of non-commuting operators, such as , are problematic for numerical studies using split-operator…