39 citations · 154 across the 10 of their papers we have counts for
11 papers
Work distribution for strongly coupled many-body open quantum systems
H. T. M. Nghiem, T. A. Costi, S. Campbell +1
The non-equilibrium quantum thermodynamics of many-body open systems is notoriously rich, especially in the strong-coupling regime where strong system-bath correlations develop and…
TraceGuard: Structured Multi-Dimensional Monitoring as a Collusion-Resistant Control Protocol
Khanh Linh Nguyen, Hoa Nghiem, Tu Tran
AI control protocols use monitors to detect attacks by untrusted AI agents, but standard single-score monitors face two limitations: they miss subtle attacks where outputs look cle…
Absorption and scattering properties of nanoparticles in an absorbing medium: modeling with experimental validation
Thi Hong Pham, Nguyen Trung Kien, Nguyen Viet Tuyen +2
Absorption and scattering properties of nanoparticles immersed in an absorbing medium are essential in understanding the overall properties of composites and in designing materials…
Self-energy method for time-dependent spectral functions of the Anderson impurity model within the time-dependent numerical renormalization group approach
H. T. M. Nghiem, T. A. Costi
The self-energy method for quantum impurity models expresses the correlation part of the self-energy in terms of the ratio of two Green's functions and allows for a more accurate c…
Phase diagram of a pseudogap Anderson model with application to graphene
Hung T. Dang, Hoa T. M. Nghiem
The Anderson model of an -wave single-orbital correlated impurity placed on a noninteracting honeycomb lattice, a simplified model for studying an impurity on graphene, is used…
Time-dependent spectral functions of the Anderson impurity model in response to a quench with application to time-resolved photoemission spectroscopy
H. T. M. Nghiem, H. T. Dang, T. A. Costi
We investigate several definitions of the time-dependent spectral function of the Anderson impurity model following a quench and within the time-dependent numerical renorm…
Time-dependent numerical renormalization group method for multiple quenches: towards exact results for the long time limit of thermodynamic observables and spectral functions
H. T. M. Nghiem, T. A. Costi
We develop an alternative time-dependent numerical renormalization group (TDNRG) formalism for multiple quenches and implement it to study the response of a quantum impurity system…
Time evolution of the Kondo resonance in response to a quench
H. T. M. Nghiem, T. A. Costi
We investigate the time evolution of the Kondo resonance in response to a quench by applying the time-dependent numerical renormalization group (TDNRG) approach to the Anderson imp…
The Ohmic two-state system from the perspective of the interacting resonant level model: Thermodynamics and transient dynamics
H. T. M. Nghiem, D. M. Kennes, C. Klöckner +2
We investigate the thermodynamics and transient dynamics of the (unbiased) Ohmic two-state system by exploiting the equivalence of this model to the interacting resonant level mode…
Time-Dependent Numerical Renormalization Group Method for Multiple Quenches: Application to General Pulses and Periodic Driving
H. T. M. Nghiem, T. A. Costi
The time-dependent numerical renormalization group method (TDNRG) [Anders et al., Phys. Rev. Lett. {\bf 95}, 196801 (2005)] was recently generalized to multiple quenches and arbitr…
Generalization of the Time-Dependent Numerical Renormalization Group Method to Finite Temperatures and General Pulses
H. Nghiem, T. A. Costi
The time-dependent numerical renormalization group (td-NRG) [Anders et al. Phys. Rev. Lett. {\bf 95}, 196801 (2006)] offers the prospect of investigating in a non-perturbative mann…