Publication

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19 to 24 of 77

14JUN 2023
Allgemein
Problem Specific Classical Optimization of Hamiltonian Simulation
In our latest pre-print, we introduce a variational algorithm for Hamiltonian simulation. As quantum optimization faces fundamental problem when performed on a quantum machine, we studied optimization on a classical computer. As opposed to prior work, the presented algorithm is applicable to any local Hamiltonian and does not require symmetry constraints. The authors show that […]
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14MAR 2023
Allgemein
Large-scale simulations of Floquet physics on near-term quantum computers
Timo Eckstein, Refik Mansuroglu, Piotr Czarnik, Jian-Xin Zhu, Michael J. Hartmann, Lukasz Cincio, Andrew T. Sornborger, Zoë Holmes Quantum systems subject to periodic driving exhibit a diverse set of phenomena both of fundamental and technological interest. However, such dynamical systems are more challenging to simulate classically than their equilibrium counterparts. Here, we introduce the Quantum […]Timo Eckstein, Refik Mansuroglu, Piotr Czarnik, Jian-Xin Zhu, Michael J. Hartmann, Lukasz Cincio, Andrew T. Sornborger, Zoë Holmes Quantum systems subject to periodic driving exhibit a diverse set of phenomena both of fundamental and technological interest. However, such dynamical systems are more challenging to simulate classically than their equilibrium counterparts. Here, we introduce the Quantum […]
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08FEB 2023
Allgemein
Variational Hamiltonian simulation for translational invariant systems via classical pre-processing
IOPscience’s Quantum Science and Technology has accepted and published a new article by Refik Mansuroglu, Timo Eckstein, Ludwig Nützel, Samuel A Wilkinson, and Michael J Hartmann, which introduces a novel technique to efficiently scale variational quantum algorithms to larger systems. The article can be found here. Product formulas like Trotter sequences are powerful, but sometimes […]
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24OCT 2022
Allgemein
Article on a “Variational Quantum Eigensolver Ansatz for the J1-J2-model”
The paper “Variational Quantum Eigensolver Ansatz for the J1-J2-model”, a work of our PhD candidate Verena Feulner, was published in Physical Review B. The J1-J2 quantum spin model goes one step beyond a nearest-neighbor interacting system by introducing next-nearest neighbor interactions along the diagonals of a rectangular lattice. This makes the ground state properties of this […]
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11JUN 2021
Allgemein
Introductory article on Cirq in the German iX magazine
The iX magazine, a well-established format by the German Heise publishing company for a professional IT audience, was putting together a comprehensive introduction on quantum computing from a practical computing perspective as a special edition. It was release on 10th June 2021 (https://www.heise.de/select/ix/2021/13 ). We contributed with an article on Google’s Open Source Python library […]
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17FEB 2021
Allgemein
Article on “Quantum approximate optimization of non-planar graph problems on a planar superconducting processor” published in Nature Physics
The paper “Quantum approximate optimization of non-planar graph problems on a planar superconducting processor”, on which Michael Streif, a PhD candidate in the Michael J Hartmann theory group, is a co-author, was published in Nature Physics. In this work, Google’s Sycamore quantum processor was used to explore the performance of the quantum approximate optimisation algorithm […]
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