Zobrazeno 1 - 10
of 452
pro vyhledávání: '"Barthel T"'
Publikováno v:
Deutsche Zeitschrift für Sportmedizin, Vol 72, Iss 2 (2021)
Background: CrossFit is a popular high-intensity, functional strength sport. Reviews of CrossFit epidemiology lack a clear definition of injury.Objectives: Based on a three-step definition of injury with time-loss and medical attention, the existing
Externí odkaz:
https://doaj.org/article/7077102b20364e51920545014c34b19a
Publikováno v:
Deutsche Zeitschrift für Sportmedizin, Vol 68, Iss 10 (2017)
Background: There is some evidence that regular physical activity has protective effects on cognitive functions in elderly people. The optimal dose of physical activity remains to be elucidated. We conducted a systematic literature research to detect
Externí odkaz:
https://doaj.org/article/5b07b33ba6054cb2b3f80249560ae1c3
Publikováno v:
Phys. Rev. Lett. 115, 217202 (2015)
We introduce a quantum dimer model on the hexagonal lattice that, in addition to the standard three-dimer kinetic and potential terms, includes a competing potential part counting dimer-free hexagons. The zero-temperature phase diagram is studied by
Externí odkaz:
http://arxiv.org/abs/1507.04643
Autor:
Lake, B., Tennant, D. A., Caux, J. -S., Barthel, T., Schollwöck, U., Nagler, S. E., Frost, C. D.
Publikováno v:
Physical Review Letters 111, 137205 (2013)
The space- and time-dependent response of many-body quantum systems is the most informative aspect of their emergent behaviour. The dynamical structure factor, experimentally measurable using neutron scattering, can map this response in wavevector an
Externí odkaz:
http://arxiv.org/abs/1307.4071
Publikováno v:
Phys. Rev. Lett. 107, 120501 (2011)
We show that the time evolution of an open quantum system, described by a possibly time dependent Liouvillian, can be simulated by a unitary quantum circuit of a size scaling polynomially in the simulation time and the size of the system. An immediat
Externí odkaz:
http://arxiv.org/abs/1105.3986
Publikováno v:
Phys. Rev. A 81, 050303(R) (2010)
We introduce a scheme for efficiently describing pure states of strongly correlated fermions in higher dimensions using unitary circuits featuring a causal cone. A local way of computing local expectation values is presented. We formulate a dynamical
Externí odkaz:
http://arxiv.org/abs/0905.0669
Publikováno v:
Phys. Rev. A 78, 023628 (2008)
We compute the phase diagram of the one-dimensional Bose-Hubbard model with a quasi-periodic potential by means of the density-matrix renormalization group technique. This model describes the physics of cold atoms loaded in an optical lattice in the
Externí odkaz:
http://arxiv.org/abs/0802.3774
Publikováno v:
J.Stat.Mech.0701:P01015,2007
We discuss the behavior of the entanglement entropy of the ground state in various collective systems. Results for general quadratic two-mode boson models are given, yielding the relation between quantum phase transitions of the system (signaled by a
Externí odkaz:
http://arxiv.org/abs/cond-mat/0610833
Publikováno v:
Phys.Rev.Lett.97:220402,2006
We present a perturbative method to compute the ground state entanglement entropy for interacting systems. We apply it to a collective model of mutually interacting spins in a magnetic field. At the quantum critical point, the entanglement entropy sc
Externí odkaz:
http://arxiv.org/abs/cond-mat/0606436
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