Browsing by Subject "SYSTEMS"
Now showing items 116 of 16

Continuousvariable entanglement in a correlated spontaneous emission laser
(American Physical Society, 2005)We discuss the generation and evolution of entangled light in a correlated spontaneous emission laser. The master equation for the twomode field in a cavity is derived and solved analytically. The timedependent characteristic ... 
Disorderinduced magnetic memory: Experiments and theories RID F64152010 RID C43842008 RID B11632008 RID A30202010
(American Physical Society, 2007) 
ElectronIon Dynamics  a Technique for Simulating both ElectronicTransitions and Ionic Motion in Molecules and Materials
(American Physical Society, 1994) 
Engineering exotic phases for topologically protected quantum computation by emulating quantum dimer models RID B78262008
(American Physical Society, 2008) 
Fast noise in the LandauZener theory RID B56172009
(American Physical Society, 2003)We study the influence of a fast noise on LandauZener transitions. We demonstrate that a fast colored noise much weaker than the conventional white noise can produce transitions itself or can change substantially the ... 
Fourthorder diffusion Monte Carlo algorithms for solving quantum manybody problems
(American Physical Society, 2001)By decomposing the important sampled imaginary time Schrodinger evolution operator to fourth order with positive coefficients, we derived a number of distinct fourthorder diffusion Monte Carlo algorithms. These sophisticated ... 
Influence of pumpphase fluctuations on entanglement generation using a correlated spontaneousemission laser
(American Physical Society, 2007)In this paper, we study the effect of phase fluctuations of the pump field upon the entanglement generation in a twophoton correlated emission laser (CEL). We consider initial vacuum and coherent state for the twocavity ... 
Longwavelength anomalous diffusion mode in the twodimensional XY dipole magnet
(American Physical Society, 1997)In a twodimensional XY ferromagnet the dipole force induces a strong interaction between spin waves in the longwavelength limit. The major effect of this interaction is the transformation of a propagating spin wave into ... 
Plasmon mass and Drude weight in strongly spinorbitcoupled twodimensional electron gases
(American Physical Society, 2011)Spinorbitcoupled twodimensional electron gases (2DEGs) are a textbook example of helical Fermi liquids, i.e., quantum liquids in which spin (or pseudospin) and momentum degrees of freedom at the Fermi surface have a ... 
Quadratic Diffusion MonteCarlo Algorithms for Solving Atomic ManyBody Problems
(American Physical Society, 1990)The diffusion Monte Carlo algorithm with and without importance sampling is analyzed in terms of the algorithm's underlying transfer matrix. The crucial role played by the Langevin algorithm in the importancesampling ... 
Response of C(60) and C(n) to ultrashort laser pulses
(American Physical Society, 2001)In this paper we introduce a method for realistic simulations of nonadiabatic processes, including the interaction of light with matter. Calculations of the response Of C(60) and carbon chains to laser pulses demonstrate ... 
Reversing entanglement change by a weak measurement
(American Physical Society, 2010)Entanglement of a system changes due to interactions with the environment. A typical type of interaction is amplitude damping. If we add a detector to monitor the environment and only select the nodamping outcome, this ... 
Reversing the weak measurement of an arbitrary field with finite photon number
(American Physical Society, 2009)For an arbitrary field with finite photon number inside a leaky cavity, we show that the nullresult measurement can be conditionally reversed, using either multiple atoms or a multilevel atom. Even with photons detected, ... 
Shorttimeevolved wave functions for solving quantum manybody problems
(American Physical Society, 2003)The exact ground state of a strongly interacting quantum manybody system can be obtained by evolving a trial state with finite overlap with the ground state to infinite imaginary time. In many cases, since the convergence ... 
Theory of weak localization in ferromagnetic (Ga,Mn)As
(American Physical Society, 2009)We study quantum interference corrections to the conductivity in (Ga,Mn)As ferromagnetic semiconductors using a model with disordered valenceband holes coupled to localized Mn moments through a pd kineticexchange ... 
Variation of the density of states in amorphous GdSi at the metalinsulator transition
(American Physical Society, 2004)We have performed detailed conductivity and tunneling measurements on the amorphous, magnetically doped material alphaGdxSi1x, which can be driven through the metalinsulator transition by the application of an external ...