Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Johannes Bausch"'
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-10 (2021)
The way quantum simulation algorithms are translated into specific hardware implementations often translates into additional overhead. Here, the authors improve the efficiency of Hamiltonian simulation using a method that allows efficient synthesis o
Externí odkaz:
https://doaj.org/article/c7bfba33fc2a4c2eb7969eaa69a8f4b3
Autor:
Severin Schmid, Heiko Becker, Ralph Fritsch, Johannes Bausch, Natalie Hunter, Carolin Jenkner, Mohamed Hassan, Bernward Passlick
Publikováno v:
Frontiers in Oncology, Vol 12 (2022)
This is a multicentre prospective randomised controlled trial for patients with 3 or more resectable pulmonary metastases from colorectal carcinoma. The study investigates the effects of pulmonary metastasectomy in addition to standard medical treatm
Externí odkaz:
https://doaj.org/article/443f7178d06c4efe9fe1a4368f122e16
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021)
Phase diagrams describe how a system changes phenomenologically as an external parameter, such as a magnetic field strength, is varied. Here, the authors prove that in general such a phase diagram is uncomputable, by explicitly constructing a one-par
Externí odkaz:
https://doaj.org/article/aec51a62637544b49346800bbd48664f
Publikováno v:
New Journal of Physics, Vol 25, Iss 3, p 033027 (2023)
In this work we investigate a binned version of quantum phase estimation (QPE) set out by Somma (2019 New J. Phys. 21 123025) and known as the quantum eigenvalue estimation problem ( QEEP ). Specifically, we determine whether the circuit decompositio
Externí odkaz:
https://doaj.org/article/30aebbc7b5824022aac1bd8d7c431765
Autor:
Johannes Bausch
Publikováno v:
Quantum, Vol 6, p 773 (2022)
Quantum state preparation is an important ingredient for other higher-level quantum algorithms, such as Hamiltonian simulation, or for loading distributions into a quantum device to be used e.g. in the context of optimization tasks such as machine le
Externí odkaz:
https://doaj.org/article/75eedbf47b0448c195a4a7020fc509e8
Publikováno v:
PRX Quantum, Vol 3, Iss 1, p 010308 (2022)
Recent work has demonstrated the existence of universal Hamiltonians—simple spin-lattice models that can simulate any other quantum many-body system to any desired level of accuracy. Until now, proofs of universality have relied on explicit constru
Externí odkaz:
https://doaj.org/article/bdb00257a2954a59a9c773a2e6b3fded
Publikováno v:
Physical Review X, Vol 10, Iss 3, p 031038 (2020)
The spectral gap problem—determining whether the energy spectrum of a system has an energy gap above ground state, or if there is a continuous range of low-energy excitations—pervades quantum many-body physics. Recently, this important problem wa
Externí odkaz:
https://doaj.org/article/dd19b888a2304ea3b68e1987b1bc203c
Autor:
Johannes Bausch, Felix Leditzky
Publikováno v:
New Journal of Physics, Vol 22, Iss 2, p 023005 (2020)
We examine the usefulness of applying neural networks as a variational state ansatz for many-body quantum systems in the context of quantum information-processing tasks. In the neural network state ansatz, the complex amplitude function of a quantum
Externí odkaz:
https://doaj.org/article/c054c64c39c94d6b8256a7523539244e
Autor:
Johannes Bausch, Elizabeth Crosson
Publikováno v:
Quantum, Vol 2, p 94 (2018)
Feynman's circuit-to-Hamiltonian construction connects quantum computation and ground states of many-body quantum systems. Kitaev applied this construction to demonstrate QMA-completeness of the local Hamiltonian problem, and Aharanov et al. used it
Externí odkaz:
https://doaj.org/article/916e0b235774419787d19c7e8648ce31
Publikováno v:
Nature Communications
Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021)
Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021)
The phase diagram of a material is of central importance in describing the properties and behaviour of a condensed matter system. In this work, we prove that the task of determining the phase diagram of a many-body Hamiltonian is in general uncomputa