Zobrazeno 1 - 10
of 391
pro vyhledávání: '"Zaránd G"'
Publikováno v:
Phys. Lett. B 855, 138841 (2024)
The recently proposed combination of the valence-space in-medium similarity renormalization group (VS-IMSRG) with the density matrix renormalization group (DMRG) offers a scalable and flexible many-body approach for strongly correlated open-shell nuc
Externí odkaz:
http://arxiv.org/abs/2402.18723
Autor:
Tichai, A., Knecht, S., Kruppa, A. T., Legeza, Ö., Moca, C. P., Schwenk, A., Werner, M. A., Zarand, G.
Publikováno v:
Phys. Lett. B 845, 138139 (2023)
We propose a novel many-body framework combining the density matrix renormalization group (DMRG) with the valence-space (VS) formulation of the in-medium similarity renormalization group. This hybrid scheme admits for favorable computational scaling
Externí odkaz:
http://arxiv.org/abs/2207.01438
We study mode-entanglement in the seniority model, derive analytic formulas for the one-body reduced density matrix of states with seniority $\nu = 0,\;1,\;2$, and $\nu=3$, and also determine the particle number dependence of the one-body reduced den
Externí odkaz:
http://arxiv.org/abs/2112.15513
Publikováno v:
SciPost Phys. Core 5, 004 (2022)
We study the dissipative dynamics of one-dimensional fermions, described in terms of the sine-Gordon model in its free massive boson or semi-classical limit, while keeping track of forward scattering processes. The system is prepared in the gapped gr
Externí odkaz:
http://arxiv.org/abs/2108.05865
Publikováno v:
SciPost Phys. 12, 061 (2022)
We consider the decay of the false vacuum, realised within a quantum quench into an anti-confining regime of the Ising spin chain with a magnetic field opposite to the initial magnetisation. Although the effective linear potential between the domain
Externí odkaz:
http://arxiv.org/abs/2105.00014
Publikováno v:
Phys. Rev. A 100, 013613 (2019)
We discuss the non-equilibrium time evolution of the phase field in the sine-Gordon model using two very different approaches: the truncated Wigner approximation and the truncated conformal space approach. We demonstrate that the two approaches agree
Externí odkaz:
http://arxiv.org/abs/1809.06789
Autor:
Keller, A. J., Peeters, L., Moca, C. P., Weymann, I., Mahalu, D., Umansky, V., Zaránd, G., Goldhaber-Gordon, D.
Publikováno v:
Nature 526, 237-240 (2015)
Quantum critical systems derive their finite temperature properties from the influence of a zero temperature quantum phase transition. The paradigm is essential for understanding unconventional high-Tc superconductors and the non-Fermi liquid propert
Externí odkaz:
http://arxiv.org/abs/1504.07620
We examine the distribution of the magnetic anisotropy (MA) experienced by a magnetic impurity embedded in a metallic nano-grain. As an example of a generic magnetic impurity with partially filled $d$-shell, we study the case of $d^{1}$ impurities im
Externí odkaz:
http://arxiv.org/abs/1501.05346
Correlations after quantum quenches in the XXZ spin chain: Failure of the Generalized Gibbs Ensemble
Publikováno v:
Phys. Rev. Lett. 113 (2014) 117203
We study the nonequilibrium time evolution of the spin-1/2 anisotropic Heisenberg (XXZ) spin chain, with a choice of dimer product and Neel states as initial states. We investigate numerically various short-ranged spin correlators in the long-time li
Externí odkaz:
http://arxiv.org/abs/1405.2843
Publikováno v:
Phys. Rev. B 90, 241108(R) (2014)
We analyze the phase diagram associated with a pair of magnetic impurities trapped in a superconducting host. The natural interplay between Kondo screening, superconductivity and exchange interactions leads to a rich array of competing phases, whose
Externí odkaz:
http://arxiv.org/abs/1403.4611