Strong-to-weak-coupling duality in the nonequilibrium interacting resonant-level model (2007)
Schiller, Avraham, Andrei, Natan
A strong-to-weak-coupling duality is established for the nonequilibrium interacting resonant-level model, describing tunneling through a single spinless level, capacitively coupled to two leads by a...
Nonequilibrium quantum-impurities: from entropy production to information theory (2007)
Nonequilibrium steady-state currents, unlike their equilibrium counterparts, continuously dissipate energy into their physical surroundings leading to entropy production and time-reversal symmetry...
Mehta, Pankaj, Chao, Sung Po, Andrei, Natan
We corrected the sign error in applying the Scattering Bethe Ansatz on the Interacting Resonance Level Model and added some comments.
Scattering approach to impurity thermodynamics (2007)
Recently the authors developed a scattering approach that allows for a complete description of the steady-state physics of quantum-impurities in and out of equilibrium. Quantum impurities are...
Nonequilibrium Transport in Quantum Impurity Models (Bethe-Ansatz for open systems) (2005)
We develop an exact non-perturbative framework to compute steady-state properties of quantum-impurities subject to a finite bias. We show that the steady-state physics of these systems is captured by...
Low energy dynamics of the one dimensional multichannel Kondo-Heisenberg Lattice (2005)
Orignac, Edmond, Andrei, Natan
We determine exactly the fixed point Hamiltonian of the one dimensional multichannel Kondo-Heisenberg lattice model for any number of channels N>=2. An anomalous singlet with non trivial internal...
Magnetism and superconductivity in underscreened Kondo chains (2005)
Orignac, Edmond, Andrei, Natan
We present a one dimensional model of electrons coupled to localized moments of spin $S\\ge 1$ in which magnetism and superconductivity interplay in a nontrivial manner. This model has a non-Fermi...
Low-energy behavior of the spin-tube and spin-orbital models (2005)
Orignac, Edmond, Citro, R., Andrei, Natan
The low-energy effective Hamiltonian of three coupled spin chains with periodic boundary conditions (spin tube) is expressed, in the limit of strong interchain coupling, in terms of XXZ chains...
Universal aspects of non-equilibrium currents in a quantum dot (2005)
Doyon, Benjamin, Andrei, Natan
We study the electric current in the non-equilibrium Kondo model at zero magnetic field, using real-time perturbation theory in the Schwinger-Keldysh formulation. We show that the perturbative...
Regular and Singular Fermi Liquid fixed points in quantum impurity models (2004)
Mehta, Pankaj, Borda, L., Zarand, Gergely, Andrei, Natan, Coleman, P.
We show that thermodynamics is insufficient to probe the nature of the low energy dynamics of quantum impurity models and a more subtle analysis based on scattering theory is required. Traditionally,...
Theory of inelastic scattering from magnetic impurities (2004)
Zarand, G., Borda, L., Von Delft, Jan, Andrei, Natan
We use the numerical renormalization group method tocalculate the single particle matrix elements $\cal T$ of the many body $T$-matrix of the conduction electrons scattered by a magnetic impurity at...
Andrei, Natan, Shimshoni, Efrat, Rosch, Achim
We outline a general approach to the computation of transport properties of interacting systems at low temperetures and frequencies. We show that if the fixed point and the irrelevant operators...
Thermal Conductivity of Spin-1/2 Chains (2003)
Shimshoni, Efrat, Andrei, Natan, Rosch, Achim
We study the low-temperature transport properties of clean one-dimensional spin-1/2 chains coupled to phonons. Due to the presence of approximate conservation laws, the heat current decays very...
Low energy dynamics of the one dimensional multichannel Kondo-Heisenberg Lattice (2000)
Orignac, Edmond, Andrei, Natan
We determine exactly the fixed point Hamiltonian of the one dimensional multichannel Kondo-Heisenberg lattice model for any number of channels N>=2. An anomalous singlet with non trivial internal...
Magnetism and superconductivity in underscreened Kondo chains (2000)
Orignac, Edmond, Andrei, Natan
We present a one dimensional model of electrons coupled to localized moments of spin $S\\ge 1$ in which magnetism and superconductivity interplay in a nontrivial manner. This model has a non-Fermi...
Low energy dynamics of the one dimensional multichannel Kondo-Heisenberg Lattice (2000)
Orignac, Edmond, Andrei, Natan
We determine exactly the fixed point Hamiltonian of the one dimensional multichannel Kondo-Heisenberg lattice model for any number of channels N>=2. An anomalous singlet with non trivial internal...
Magnetism and superconductivity in underscreened Kondo chains (2000)
Orignac, Edmond, Andrei, Natan
We present a one dimensional model of electrons coupled to localized moments of spin $S\\ge 1$ in which magnetism and superconductivity interplay in a nontrivial manner. This model has a non-Fermi...
Low-energy behavior of the spin-tube and spin-orbital models (1999)
Orignac, Edmond, Citro, R., Andrei, Natan
The low-energy effective Hamiltonian of three coupled spin chains with periodic boundary conditions (spin tube) is expressed, in the limit of strong interchain coupling, in terms of XXZ chains...
Low-energy behavior of the spin-tube and spin-orbital models (1999)
Orignac, Edmond, Citro, R., Andrei, Natan
The low-energy effective Hamiltonian of three coupled spin chains with periodic boundary conditions (spin tube) is expressed, in the limit of strong interchain coupling, in terms of XXZ chains...
Reply to the Comment on "Bound States in the One-dimensional Hubbard Model" (1998)
We reply to the comment (cond-mat/9806125) by Essler, Goehmann and Korepin, and show that their points are unfounded.
Chiral Liquids in 1-d: A New Class of NFL-Fixed Points (1998)
Andrei, Natan, Douglas, Michael R., Jerez, Andres
We identify a non Fermi Liquid (NFL) class of fixed points describing the infrared behaviour of interacting chiral fermions in one dimension. The thermodynamic properties and asymptotic correlation...
Jerez, Andres, Andrei, Natan, Zarand, Gergely
A complete Bethe Ansatz solution of the SU(N)xSU(f) Coqblin Schrieffer model and a detailed analysis of some physical applications of the model are given. As in the usual multichannel Kondo model a...
A New Quantum Phase Transition in the Coupled Quantum Dots System (1997)
Andrei, Natan, Zimanyi, Gergely T., Schoen, Gerd
We study two quantum dots in the limit of strong dot-lead coupling and weak dot-dot tunneling. The model maps on Ising-coupled Kondo impurities. We argue that a new quantum critical fixed point...
Chiral Non-Fermi Liquids in 1-d (1995)
Andrei, Natan, Douglas, Michael R., Jerez, Andrés
We study models of chiral interacting fermions by means of conformal and Bethe-Ansatz techniques, and determine their thermodynamic properties and asymptotic correlation functions. We identify a...
We solve the Multichannel Kondo model with channel anisotropy using the Bethe Ansatz method. The model generates energy scales, characterizing the neighborhoods of the various infrared fixed points,...
Integrble Models in Condensed Matter Physics (1994)
This is an expanded version of the lectures given at the Trieste Summer School 1992 on Low-dimensional Quantum Field Theories for Condensed Matter Physicists.