Zobrazeno 1 - 10
of 248
pro vyhledávání: '"Rasanen E."'
By using the propagator of linear potential as a main tool, we extend the Airy gas model, originally developed for the three-dimensional ($d=3$) edge electron gas, to systems in reduced dimensions ($d=2,1$). First, we derive explicit expressions for
Externí odkaz:
http://arxiv.org/abs/2010.00941
Publikováno v:
Phys. Rev. A 93, 032503 (2016)
Physically valid and numerically efficient approximations for the exchange and correlation energy are critical for reduced density-matrix functional theory to become a widely used method in electronic structure calculations. Here we examine the physi
Externí odkaz:
http://arxiv.org/abs/1602.03624
We construct a generalized-gradient approximation for the exchange-energy density of finite two-dimensional systems. Guided by non-empirical principles, we include the proper small-gradient limit and the proper tail for the exchange-hole potential. T
Externí odkaz:
http://arxiv.org/abs/1403.6297
Employing a local formula for the electron-electron interaction energy, we derive a self-consistent approximation for the total energy of a general $N$-electron system. Our scheme works as a local variant of the Thomas-Fermi approximation and yields
Externí odkaz:
http://arxiv.org/abs/1310.8113
Publikováno v:
Phys. Rev. A 88, 013414 (2013)
We show that quantum optimal control theory (OCT) and time-dependent density-functional theory (TDDFT) can be combined to provide realistic femtosecond laser pulses for an enhanced ionization yield in many-electron systems. Using the H$_2$-molecule a
Externí odkaz:
http://arxiv.org/abs/1309.0786
We study the formation and characteristics of "spin droplets",i.e., compact spin-polarized configurations in the highest occupied Landau level, in an etched quantum Hall device at filling factors $2\leq\nu\leq3$. The confining potential for electrons
Externí odkaz:
http://arxiv.org/abs/1301.6528
Publikováno v:
Eur. Phys. J. B 86, 155 (2013)
We apply time-dependent density-functional theory to study many-electron transport in Aharonov-Bohm interferometers in a non-equilibrium situation. The conductance properties in the system are complex and depend on the enclosed magnetic flux in the i
Externí odkaz:
http://arxiv.org/abs/1210.3134
Publikováno v:
J. Phys. A: Math. Theor. 46, 235102 (2013)
We apply a molecular dynamics scheme to analyze classically chaotic properties of a two-dimensional circular billiard system containing two Coulomb-interacting electrons. As such, the system resembles a prototype model for a semiconductor quantum dot
Externí odkaz:
http://arxiv.org/abs/1210.2811
Publikováno v:
Phys. Rev. B 86, 205308 (2012)
We present theory and calculations for coherent high-fidelity quantum control of many-particle states in semiconductor quantum wells. We show that coupling a two-electron double quantum dot to a terahertz optical source enables targeted excitations t
Externí odkaz:
http://arxiv.org/abs/1205.4533
Publikováno v:
Phys. Rev. A 85, 052514 (2012)
In the framework of density-functional theory, several popular density functionals for exchange and correlation have been constructed to satisfy a local form of the Lieb-Oxford bound. In its original global expression, the bound represents a rigorous
Externí odkaz:
http://arxiv.org/abs/1204.6332