Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Lee, D. K. K."'
Autor:
Varley, J. R., Lee, D. K. K.
Publikováno v:
Phys. Rev. B 94, 174519 (2016)
We investigate the possibility of excitonic superfluidity in electron-hole bilayers. We calculate the phase diagram of the system for the whole range of electron-hole density imbalance and for different degrees of electrostatic screening, using mean-
Externí odkaz:
http://arxiv.org/abs/1611.09717
Autor:
Malone, Fionn D., Blunt, N. S., Brown, Ethan W., Lee, D. K. K., Spencer, J. S., Foulkes, W. M. C., Shepherd, James J.
Publikováno v:
Phys. Rev. Lett. 117, 115701 (2016)
Density matrix quantum Monte Carlo (DMQMC) is used to sample exact-on-average $N$-body density matrices for uniform electron gas systems of up to 10$^{124}$ matrix elements via a stochastic solution of the Bloch equation. The results of these calcula
Externí odkaz:
http://arxiv.org/abs/1602.05104
Autor:
Malone, Fionn D., Blunt, N. S., Shepherd, James J., Lee, D. K. K., Spencer, J. S., Foulkes, W. M. C.
Publikováno v:
J. Chem. Phys. 143, 044116 (2015)
The recently developed density matrix quantum Monte Carlo (DMQMC) algorithm stochastically samples the N -body thermal density matrix and hence provides access to exact properties of many-particle quantum systems at arbitrary temperatures. We demonst
Externí odkaz:
http://arxiv.org/abs/1506.03057
Publikováno v:
Phys. Rev. Lett. 111, 130408 (2013)
We study the decoherence and thermalization dynamics of a nanoscale system coupled nonperturbatively to a fully quantum-mechanical bath. The system is prepared out of equilibrium in a pure state of the complete system. We propose a random matrix mode
Externí odkaz:
http://arxiv.org/abs/1306.4986
Publikováno v:
Phys. Rev. A 86, 023609 (2012)
We present a study of thermalisation of a small isolated Hubbard lattice cluster prepared in a pure state with a well-defined energy. We examine how a two-site subsystem of the lattice thermalises with the rest of the system as its environment. We ex
Externí odkaz:
http://arxiv.org/abs/1204.3036
Publikováno v:
Phys. Rev. B 85, 165320 (2012)
We discuss the diamagnetism induced in an isolated quantum Hall bilayer with total filling factor one by an in-plane magnetic field. This is a signature of counterflow superfluidity in these systems. We calculate magnetically induced currents in the
Externí odkaz:
http://arxiv.org/abs/1112.4674
Publikováno v:
Advances in Condensed Matter Physics, 2011, 792125 (2011)
We present a theory for the regime of coherent interlayer tunneling in a disordered quantum Hall bilayer at total filling factor one, allowing for the effect of static vortices. We find that the system consists of domains of polarized superfluid phas
Externí odkaz:
http://arxiv.org/abs/1011.3943
Publikováno v:
Phys. Rev. Lett. 105, 260402 (2010)
We study numerically the thermalisation and temporal evolution of the reduced density matrix for a two-site subsystem of a fermionic Hubbard model prepared far from equilibrium at a definite energy. Even for very small systems near quantum degeneracy
Externí odkaz:
http://arxiv.org/abs/1005.4863
Publikováno v:
Phys. Rev. Lett. 105, 236805 (2010)
We present a theory of the critical interlayer tunneling current in a disordered quantum Hall bilayer at total filling factor one, allowing for the effect of static vortices. In agreement with recent experiments [Phys. Rev. B 80, 165120 (2009); ibid.
Externí odkaz:
http://arxiv.org/abs/1003.5191
Autor:
Ros, O. G. C., Lee, D. K. K.
Publikováno v:
Phys. Rev. B, 81, 075115 (2010)
We study the transport properties of the quantum Hall bilayers systems looking closely at the effect that disorder and electron-phonon interaction have on the interlayer tunnelling current in the presence of an in-plane magnetic field $B_\parallel$.
Externí odkaz:
http://arxiv.org/abs/0911.2647