Concept
Density matrix
Related publications (109)
Empirical Sample Complexity of Neural Network Mixed State Reconstruction
Giuseppe Carleo, Filippo Vicentini, Haimeng Zhao
Quantum state reconstruction using Neural Quantum States has been proposed as a viable tool to reduce quantum shot complexity in practical applications, and its advantage over competing techniques has been shown in numerical experiments focusing mainly on ...
Verein Forderung Open Access Publizierens Quantenwissenschaf2024Adaptive variational low-rank dynamics for open quantum systems
We introduce a model-independent method for the efficient simulation of low-entropy systems, whose dynamics can be accurately described with a limited number of states. Our method leverages the time-dependent variational principle to efficiently integrate ...
Amer Physical Soc2024Signatures of a sampling quantum advantage in driven quantum many-body systems
A crucial milestone in the field of quantum simulation and computation is to demonstrate that a quantum device can perform a computation task that is classically intractable. A key question is to identify setups that can achieve such goal within current te ...
IOP Publishing Ltd2023Time-evolution of local information: Thermalization dynamics of local observables
Quantum many-body dynamics generically result in increasing entanglement that eventually leads to thermalization of local observables. This makes the exact description of the dynamics complex despite the apparent simplicity of (high-temperature) thermal st ...
SCIPOST FOUNDATION2022Virtual Capacitor Concept for Partitioning of Large Converter Systems for RT-HIL Simulations
Drazen Dujic, Stefan Milovanovic, Philippe Alexandre Bontemps
In this paper, the real-time simulation model of the modular multilevel matrix converter was split into three independent instances using the concept of virtual capacitance. In doing so, the number of state space matrices that define the system has been re ...
2022Efficient lattice Green's function method for bounded domain problems
William Curtin, Ankit Gupta, Max Ludwig Hodapp
The lattice Green's function method (LGFM) is the discrete counterpart of the continuum boundary element method and is a natural approach for solving intrinsically discrete solid mechanics problems that arise in atomistic-continuum coupling methods. Here, ...
WILEY2022Wigner Measures and Coherent Quantum Control
We introduce Wigner measures for infinite-dimensional open quantum systems; important examples of such systems are encountered in quantum control theory. In addition, we propose an axiomatic definition of coherent quantum feedback. ...
2021Quantum conformance test
We introduce a protocol addressing the conformance test problem, which consists in determining whether a process under test conforms to a reference one. We consider a process to be characterized by the set of end products it produces, which is generated ac ...
AMER ASSOC ADVANCEMENT SCIENCE2021Virtual Capacitor Concept for Effective Real-Time MMC Simulations
Drazen Dujic, Stefan Milovanovic, Min Luo
In this paper, the real-time simulation model of the modular multilevel converter was split into several independent parts through the use of the virtual capacitor concept. As a result, the number of state-space matrices the real-time solver needs to take ...
2021Efficient implementation of atom-density representations
Michele Ceriotti, Till Junge, Guillaume André Jean Fraux, Félix Benedito Clément Musil, Michael John Willatt, Max David Veit, Alexander Jan Goscinski
Physically motivated and mathematically robust atom-centered representations of molecular structures are key to the success of modern atomistic machine learning. They lie at the foundation of a wide range of methods to predict the properties of both materi ...
2021