# All

## Time-dependent Hamiltonian simulation with $L^1$-norm scaling. (arXiv:1906.07115v1 [quant-ph])

The difficulty of simulating quantum dynamics depends on the norm of the
Hamiltonian. When the Hamiltonian varies with time, the simulation complexity
should only depend on this quantity instantaneously. We develop quantum
simulation algorithms that exploit this intuition. For the case of sparse
Hamiltonian simulation, the gate complexity scales with the $L^1$ norm
$\int_{0}^{t}\mathrm{d}\tau\left\lVert H(\tau)\right\lVert_{\max}$, whereas the

## Robust Weyl points in a 1D superlattice with transverse spin-orbit coupling. (arXiv:1906.06820v1 [cond-mat.quant-gas])

Weyl points, synthetic magnetic monopoles in the 3D momentum space, are the
key features of topological Weyl semimetals. The observation of Weyl points in
ultracold atomic gases usually relies on the realization of high-dimensional
spin-orbit coupling (SOC) for two pseudospin states (% \textit{i.e.,}
spin-1/2), which requires complex laser configurations and precise control of
laser parameters, thus has not been realized in experiment. Here we propose
that robust Wely points can be realized using 1D triple-well superlattices

## Distance scaling and polarization of electric-field noise in a surface ion trap. (arXiv:1906.06489v1 [quant-ph])

We probe electric-field noise in a surface ion trap for ion-surface distances
$d$ between 50 and 300 $\mu\mathrm{m}$ in the normal and planar directions. We
find the noise distance dependence to scale as $d^{-2.6}$ in our trap and a
frequency dependence which is consistent with $1/f$ noise. Simulations of the
electric-field noise specific to our trap geometry provide evidence that we are
not limited by technical noise sources. Our distance scaling data is consistent

## Predicting Research Trends with Semantic and Neural Networks with an application in Quantum Physics. (arXiv:1906.06843v1 [cs.DL])

The vast and growing number of publications in all disciplines of science
cannot be comprehended by a single human researcher. As a consequence,
researchers have to specialize in narrow sub-disciplines, which makes it
challenging to uncover scientific connections beyond the own field of research.
Thus access to structured knowledge from a large corpus of publications could
help pushing the frontiers of science. Here we demonstrate a method to build a
semantic network from published scientific literature, which we call SemNet. We

## Elimination of Thermomechanical Noise in Piezoelectric Optomechanical Crystals. (arXiv:1812.09417v2 [quant-ph] UPDATED)

Mechanical modes are a potentially useful resource for quantum information
applications, such as quantum-level wavelength transducers, due to their
ability to interact with electromagnetic radiation across the spectrum. A
significant challenge for wavelength transducers is thermomechanical noise in
the mechanical mode, which pollutes the transduced signal with thermal states.
In this paper, we eliminate thermomechanical noise in the GHz-frequency
mechanical breathing mode of a piezoelectric optomechanical crystal using

## Constraints on nonlocality in networks from no-signaling and independence. (arXiv:1906.06495v1 [quant-ph])

Generalising the concept of Bell nonlocality to networks leads to novel forms
of correlations, the characterization of which is however challenging. Here we
investigate constraints on correlations in networks under the two natural
assumptions of no-signaling and independence of the sources. We consider the
triangle network'', and derive strong constraints on correlations even though
the parties receive no input, i.e. each party performs a fixed measurement. We

## Phase Matching Quantum Key Distribution based on Single-Photon Entanglement. (arXiv:1906.06865v1 [quant-ph])

Two time-reversal quantum key distribution (QKD) schemes are the quantum
entanglement based device-independent (DI)-QKD and
measurement-device-independent (MDI)-QKD. The recently proposed twin field
(TF)-QKD, also known as phase-matching (PM)-QKD, has improved the key rate
bound from $O\left( \eta \right )$ to $O\left( \sqrt {\eta} \right )$ with
$\eta$ the channel transmittance. In fact, TF-QKD is a kind of MDI-QKD but
based on single-photon detection. In this paper, we propose a different PM-QKD

## Continuous-time Quantum Error Correction with Noise-assisted Quantum Feedback. (arXiv:1902.00115v4 [quant-ph] UPDATED)

We address the standard quantum error correction using the three-qubit
bit-flip code, yet in continuous-time. This entails rendering a target manifold
of quantum states globally attractive. Previous feedback designs could feature
spurious equilibria, or resort to discrete kicks pushing the system away from
these equilibria to ensure global asymptotic stability. We present a new
approach that consists of introducing controls driven by Brownian motions.