Zobrazeno 1 - 10
of 360
pro vyhledávání: '"De Raedt, H. A."'
Publikováno v:
Eur. Phys. J. B 95:158 (2022)
Recent electron spin resonance experiments on CaWO$_4$:Gd$^{3+}$ and on other magnetic impurities have demonstrated that sustained Rabi oscillations can be created by driving a magnetic moment with a microwave field frequency slightly larger than the
Externí odkaz:
http://arxiv.org/abs/2205.14863
Autor:
Willsch, M., Willsch, D., Michielsen, K., Jin, F., Denkmayr, T., Sponar, S., Hasegawa, Y., De Raedt, H.
Publikováno v:
J. Phys. Soc. Jpn. 90, 012001 (2021)
We present a detailed analysis of the time series of time-stamped neutron counts obtained by single-neutron interferometry. The neutron counting statistics display the usual Poissonian behavior, but the variance of the neutron counts does not. Instea
Externí odkaz:
http://arxiv.org/abs/2005.11046
Publikováno v:
Phys. Rev. A 98, 052348 (2018)
We extensively test a recent protocol to demonstrate quantum fault tolerance on three systems: (1) a real-time simulation of five spin qubits coupled to an environment with two-level defects, (2) a real-time simulation of transmon quantum computers,
Externí odkaz:
http://arxiv.org/abs/1805.05227
Publikováno v:
Ann. Phys. 396, 137 (2018)
A quantum measuring instrument is constructed that utilises symmetry breaking to enhance a microscopic signal. The entire quantum system consists of a system-apparatus-environment triad that is composed of a small set of spin-1/2 particles. The appar
Externí odkaz:
http://arxiv.org/abs/1804.08151
Publikováno v:
Phys. Rev. B 98, 014416 (2018)
In the theory of antiferromagnetism, the staggered field---an external magnetic field that alternates in sign on atomic length scales---is used to select the classical N\'eel state from a quantum magnet, but justification is missing. This work examin
Externí odkaz:
http://arxiv.org/abs/1711.07738
Publikováno v:
Phys. Rev. A 96, 062302 (2017)
In the model of gate-based quantum computation, the qubits are controlled by a sequence of quantum gates. In superconducting qubit systems, these gates can be implemented by voltage pulses. The success of implementing a particular gate can be express
Externí odkaz:
http://arxiv.org/abs/1709.06600
Publikováno v:
Open Physics 15, 713 - 733, 2017
Recent Einstein-Podolsky-Rosen-Bohm experiments [M. Giustina et al. Phys. Rev. Lett. 115, 250401 (2015); L. K. Shalm et al. Phys. Rev. Lett. 115, 250402 (2015)] that claim to be loophole free are scrutinized and are shown to suffer a photon identific
Externí odkaz:
http://arxiv.org/abs/1707.08307
Publikováno v:
Phys. Rev. E 96, 020105, 2017
We study the real-time and real-space dynamics of charge in the one-dimensional Hubbard model in the limit of high temperatures. To this end, we prepare pure initial states with sharply peaked density profiles and calculate the time evolution of thes
Externí odkaz:
http://arxiv.org/abs/1702.00421
Publikováno v:
SciPost Phys. 2, 010 (2017)
We study the decoherence process of a four spin-1/2 antiferromagnet that is coupled to an environment of spin-1/2 particles. The preferred basis of the antiferromagnet is discussed in two limiting cases and we identify two $\it{exact}$ pointer states
Externí odkaz:
http://arxiv.org/abs/1612.03099
Publikováno v:
Phys. Rev. B 95, 035155 (2017)
The real-time broadening of density profiles starting from non-equilibrium states is at the center of transport in condensed-matter systems and dynamics in ultracold atomic gases. Initial profiles close to equilibrium are expected to evolve according
Externí odkaz:
http://arxiv.org/abs/1610.05778