868 citations · 3.6k across the 56 of their papers we have counts for
35 papers · 1 filter
Tuning the universality class of a quantum process by Trotterization
Robin Prampain dit Boulan, Jerom Jebai, Hendrik Weimer
We numerically analyze a discretized version of the quantum contact process, a non-equilibrium model having a competition between a coherent infection process and a dissipative rec…
Self-correction phase transition in the dissipative toric code
Sanjeev Kumar, Hendrik Weimer
We analyze a time-continuous version of a cellular automaton decoder for the toric code in the form of a Lindblad master equation. In this setting, a self-correcting quantum memory…
Dynamical quantum phase transition with singular multipartite entanglement
Jie Chen, Ricardo Costa de Almeida, Hendrik Weimer
We investigate the nonequilibrium quench dynamics of the one-dimensional transverse-field Ising model in both integrable and nonintegrable regimes. In particular, we report on a no…
Efficient computation of topological order
Louis Fraatz, Amit Jamadagni, Hendrik Weimer
We analyze the computational aspects of detecting topological order in a quantum many-body system. We contrast the widely used topological entanglement entropy with a recently intr…
Stabilizing quantum simulations of lattice gauge theories by dissipation
Tobias Schmale, Hendrik Weimer
Simulations of lattice gauge theories on noisy quantum hardware inherently suffer from violations of the gauge symmetry due to coherent and incoherent errors of the underlying phys…
Real-time hybrid quantum-classical computations for trapped-ions with Python control-flow
Tobias Schmale, Bence Temesi, Niko Trittschanke +7
In recent years, the number of hybrid algorithms that combine quantum and classical computations has been continuously increasing. These two approaches to computing can mutually en…
Backend compiler phases for trapped-ion quantum computers
Tobias Schmale, Bence Temesi, Alakesh Baishya +6
A promising architecture for scaling up quantum computers based on trapped ions are so called Quantum Charged-Coupled Devices (QCCD). These consist of multiple ion traps, each desi…
Learning of error statistics for the detection of quantum phases
Amit Jamadagni, Javad Kazemi, Hendrik Weimer
We present a binary classifier based on neural networks to detect gapped quantum phases. By considering the errors on top of a suitable reference state describing the gapped phase,…
Genuine Bistability in Open Quantum Many-Body Systems
Javad Kazemi, Hendrik Weimer
We analyze the long-time evolution of open quantum many-body systems using a variational approach. For the dissipative Ising model, where mean-field theory predicts a wide region o…
Unpredictability and entanglement in open quantum systems
Javad Kazemi, Hendrik Weimer
We investigate dynamical many-body systems capable of universal computation, which leads to their properties being unpredictable unless the dynamics is simulated from the beginning…
Variational analysis of driven-dissipative bosonic fields
Tim Pistorius, Hendrik Weimer
We present a method to perform a variational analysis of the quantum master equation for driven-disspative bosonic fields with arbitrary large occupation numbers. Our approach comb…
Quantum many-body dynamics of driven-dissipative Rydberg polaritons
T. Pistorius, J. Kazemi, H. Weimer
We study the propagation of strongly interacting Rydberg polaritons through an atomic medium in a one-dimensional optical lattice. We derive an effective single-band Hubbard model…
Energy localization in interacting atomic chains with topological solitons
L. Timm, H. Weimer, L. Santos +1
Topological defects in low-dimensional non-linear systems feature a sliding-to-pinning transition of relevance for a variety of research fields, ranging from biophysics to nano- an…
Simulation methods for open quantum many-body systems
Hendrik Weimer, Augustine Kshetrimayum, Román Orús
Coupling a quantum many-body system to an external environment dramatically changes its dynamics and offers novel possibilities not found in closed systems. Of special interest are…
Initialization of quantum simulators by sympathetic cooling
Meghana Raghunandan, Fabian Wolf, Christian Ospelkaus +2
Simulating computationally intractable many-body problems on a quantum simulator holds great potential to deliver insights into physical, chemical, and biological systems. While th…
Lecture Notes on Quantum Simulation
Hendrik Weimer
These lecture notes were created for a graduate-level course on quantum simulation taught at Leibniz University Hannover in 2013. The first part of the course discusses various sta…
High-density quantum sensing with dissipative first order transitions
Meghana Raghunandan, Jörg Wrachtrup, Hendrik Weimer
The sensing of external fields using quantum systems is a prime example of an emergent quantum technology. Generically, the sensitivity of a quantum sensor consisting of indepe…
Dissipative Preparation of Entangled Many-Body States with Rydberg Atoms
Maryam Roghani, Hendrik Weimer
We investigate a one-dimensional atomic lattice laser-driven to a Rydberg state, in which engineered dissipation channels lead to entanglement in the many-body system. In particula…
Tailored jump operators for purely dissipative quantum magnetism
Hendrik Weimer
I propose an archtitecture for the realization of dissipative quantum many-body spin models. The dissipative processes are mediated by interactions with auxiliary particles and lea…
Open-system many-body dynamics through interferometric measurements and feedback
Jonas Lammers, Hendrik Weimer, Klemens Hammerer
Light-matter interfaces enable the generation of entangled states of light and matter which can be exploited to steer the quantum state of matter through measurement of light and f…
Time evolution of open quantum many-body systems
Vincent R. Overbeck, Hendrik Weimer
We establish a generic method to analyze the time evolution of open quantum many-body systems. Our approach is based on a variational integration of the quantum master equation des…
Variational principle for steady states of dissipative quantum many-body systems
Hendrik Weimer
We present a novel generic framework to approximate the non-equilibrium steady states of dissipative quantum many-body systems. It is based on the variational minimization of a sui…
Collectively Enhanced Interactions in Solid-state Spin Qubits
Hendrik Weimer, Norman Y. Yao, Mikhail D. Lukin
We propose and analyze a technique to collectively enhance interactions between solid-state quantum registers composed from random networks of spin qubits. In such systems, disorde…
Topologically Protected Quantum State Transfer in a Chiral Spin Liquid
Norman Y. Yao, Chris R. Laumann, Alexey V. Gorshkov +5
Topology plays a central role in ensuring the robustness of a wide variety of physical phenomena. Notable examples range from the robust current carrying edge states associated wit…