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Raindrop detection on car windshields using geometric-photometric environment construction and intensity-based correlation
A novel approach that detects raindrops on a car windshield using only a single image from an in-vehicle camera and a standard interest point detector for pre-selection of raindrop candidates is presented.
Dynamical phase diagram of quantum spin chains with long-range interactions
Using an infinite matrix product state (iMPS) technique based on the time-dependent variational principle (TDVP), we study two major types of dynamical phase transitions (DPT) in the one-dimensional…
Anomalous dynamical phase in quantum spin chains with long-range interactions
The existence or absence of nonanalytic cusps in the Loschmidt-echo return rate is traditionally employed to distinguish between a regular dynamical phase (regular cusps) and a trivial phase (no…
Observation of gauge invariance in a 71-site Bose-Hubbard quantum simulator.
The quantum simulation of an extended U(1) lattice gauge theory is reported, and the degree to which Gauss's law is violated is measured by extracting probabilities of locally gauge-invariant states from correlated atom occupations, providing a way to explore gauge symmetry in the interplay of fundamental particles using controllable large-scale quantum simulators.
Gauge-Symmetry Protection Using Single-Body Terms
- Jad C. Halimeh, Haifeng Lang, Julius Mildenberger, Zhang Jiang, P. Hauke
- PhysicsPRX Quantum
- 1 July 2020
Quantum-simulator hardware promises new insights into problems from particle and nuclear physics. A major challenge is to reproduce gauge invariance, as violations of this quintessential property of…
Local measures of dynamical quantum phase transitions
In recent years, dynamical quantum phase transitions (DQPTs) have emerged as a useful theoretical concept to characterize nonequilibrium states of quantum matter. DQPTs are marked by singular…
Reliability of lattice gauge theories in the thermodynamic limit
Maarten Van Damme, Haifeng Lang, 3 Philipp Hauke, and Jad C. Halimeh Department of Physics and Astronomy, University of Ghent, Krijgslaan 281, 9000 Gent, Belgium INO-CNR BEC Center and Department of…
Invisibility cloaks in relativistic motion
We consider an ideal invisibility cloak which is illuminated by monochromatic light and which moves in vacuum at constant relativistic velocity with respect to the common inertial frame of light…
Fresnel-Fizeau drag: Invisibility conditions for all inertial observers
It was recently shown [J. C. Halimeh et al., Phys. Rev. A 93, 013850 (2016)] that as a result of the Doppler effect, inherently dispersive single-frequency ideal free-space invisibility cloaks in…
Probing the anomalous dynamical phase in long-range quantum spin chains through Fisher-zero lines.
This work finds that the corresponding Fisher-zero lines exhibit a qualitative difference in their behavior, where, unlike in the case of the regular phase, some of them terminate before intersecting the imaginary axis, indicating the existence of smooth peaks in the return rate preceding the cusps.