Suchergebnisse
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Vor 4 Tagen · However, standard micromagnetic theory, developed for magnetic moments of fixed lengths, lacks full applicability in studying such singularities. To address this gap, we study a Bloch point in a quantum Heisenberg model for the case of spin-1/2 particles. Performing an exact diagonalization of the Hamiltonian as well as using density matrix renormalization group techniques, we obtain the ...
Vor 5 Tagen · View PDF Abstract: The rapid development of quantum computers has enabled demonstrations of quantum advantages on various tasks. However, real quantum systems are always dissipative due to their inevitable interaction with the environment, and the resulting non-unitary dynamics make quantum simulation challenging with only unitary quantum gates ...
Vor einem Tag · J. Robert Oppenheimer (born Julius Robert Oppenheimer; / ˈɒpənhaɪmər / OP-ən-hy-mər; April 22, 1904 – February 18, 1967) was an American theoretical physicist. He was director of the Manhattan Project 's Los Alamos Laboratory during World War II and is often called the "father of the atomic bomb ". Born in New York City, Oppenheimer ...
Vor 5 Tagen · A Bloch point represents a three-dimensional hedgehog singularity of a magnetic vector field in which the magnetization vanishes. However, standard micromagnetic theory, developed for magnetic moments of fixed lengths, lacks full applicability in studying such singularities. To address this gap, we study a Bloch point in a quantum Heisenberg model for the case of spin-1/2 particles. Performing ...
Vor 5 Tagen · MgMn3(OH)6Cl2 serves readily as the classical Heisenberg kagome antiferromagnet lattice spin frustration material, due to its similarity to herbertsmithite in composition and crystal structure. In this work, nanosheets of MgMn3(OH)6Cl2 are synthesized through a solid-phase reaction. Low-temperature magnetic measurements revealed two antiferromagnetic transitions, occurring at ∼8 and 55 K ...
Vor 10 Stunden · p. 38). He also followed closely developments in quantum theory, giving lectures on the old quantum theory in the Winter semester of 1922/23, which were written up by Lothar Nordheim,adoctoralstrudentofMaxBorn(SauerandMajer2009). Nordheimhadbeen explicitly recruited by Hilbert from Sommerfeld’s group in Munich as a sort of liaison for 7
Vor 5 Tagen · Simulation of open quantum systems on universal quantum computers. Huan-Yu Liu, Xiaoshui Lin, Zhao-Yun Chen, Cheng Xue, Tai-Ping Sun, Qing-Song Li, Xi-Ning Zhuang, Yun-Jie Wang, Yu-Chun Wu, Ming Gong, Guo-Ping Guo. (Submitted on 31 May 2024) The rapid development of quantum computers has enabled demonstrations of quantum advantages on various ...
