118 citations · 2k across the 92 of their papers we have counts for
21 papers · 1 filter
Ballistic Entanglement Cloud after a Boundary Quench
Bedoor Alkurtass, Abolfazl Bayat, Pasquale Sodano +2
Entanglement has been extensively used to characterize the structure of strongly correlated many-body systems. Most of these analyses focus on either spatial properties of entangle…
Lindblad master equation approach to the topological phase transition in the disordered Su-Schrieffer-Heeger model
Andrea Nava, Gabriele Campagnano, Pasquale Sodano +1
We use the Lindblad equation method to investigate the onset of a mobility edge and the topological phase transition in the disordered SSH chain connected to two external baths in…
Tunable Kondo screening length at a Y-junction of three inhomogenous spin chains
Domenico Giuliano, Andrea Nava, Pasquale Sodano
We derive the topological Kondo Hamiltonian describing a Y junction of three XX-spin chains connected to outer quantum Ising chains with different tilting angles for the Ising axis…
Emerging Majorana Modes in Junctions of One-Dimensional Spin Systems
Domenico Giuliano, Andrea Trombettoni, Pasquale Sodano
The non-local effects induced by Majorana fermions in field theories for condensed matter systems are deeply related to the fermion charge fractionalization discovered by Roman Jac…
From four- to two-channel Kondo effect in junctions of XY spin chains
Domenico Giuliano, Pasquale Sodano, Arturo Tagliacozzo +1
We consider the Kondo effect in Y-junctions of anisotropic XY models in an applied magnetic field along the critical lines characterized by a gapless excitation spectrum. We find t…
Entanglement structure of the two-channel Kondo model
Bedoor Alkurtass, Abolfazl Bayat, Ian Affleck +5
Two electronic channels competing to screen a single impurity spin, as in the two-channel Kondo model, are expected to generate a ground state with nontrivial entanglement structur…
Universal Single-Frequency Oscillations in a Quantum Impurity System After a Local Quench
Abolfazl Bayat, Sougato Bose, Henrik Johannesson +1
Long-lived single-frequency oscillations in the local non-equilibrium dynamics of a quantum many-body system is an exceptional phenomenon. In fact, till now, it has never been obse…
Thermodynamics of the Topological Kondo Model
Francesco Buccheri, Hrachya Babujian, Vladimir E. Korepin +2
Using the thermodynamic Bethe ansatz, we investigate the topological Kondo model, which describes a set of one-dimensional external wires, pertinently coupled to a central region h…
An order parameter for impurity systems at quantum criticality
Abolfazl Bayat, Henrik Johannesson, Sougato Bose +1
A quantum phase transition may occur in the ground state of a system at zero temperature when a controlling field or interaction is varied. The resulting quantum fluctuations which…
Realization of a two-channel Kondo model with Josephson junction networks
Domenico Giuliano, Pasquale Sodano
We show that- in the quantum regime- a Josephson junction rhombi chain (i.e. a Josephson junction chain made by rhombi formed by joining 4 Josephson junctions) may be effectively m…
XXZ spin-1/2 representation of a finite-U Bose-Hubbard chain at half-integer filling
Domenico Giuliano, Davide Rossini, Pasquale Sodano +1
Using a similarity Hamiltonian renormalization procedure, we determine an effective spin-1/2 representation of the Bose-Hubbard model at half-integer filling and at a finite on-sit…
Entanglement probe of two-impurity Kondo physics in a spin chain
Abolfazl Bayat, Sougato Bose, Pasquale Sodano +1
We propose that real-space properties of the two-impurity Kondo model can be obtained from an effective spin model where two single-impurity Kondo spin chains are joined via an RKK…
From topological insulators to superconductors and Confinement
M. Cristina Diamantini, Pasquale Sodano, Carlo A. Trugenberger
Topological matter in 3D is characterized by the presence of a topological BF term in its long-distance effective action. We show that, in 3D, there is another marginal term that m…
Topological Quantum Phase Transitions in Topological Superconductors
M. Cristina Diamantini, Pasquale Sodano, Carlo A. Trugenberger
In this paper we show that BF topological superconductors (insulators) exibit phase transitions between different topologically ordered phases characterized by different ground sta…
Characterizing Topological Order in Superconducting Systems
M. Cristina Diamantini, Pasquale Sodano
Two established frameworks account for the onset of a gap in a superconducting system: one is based on spontaneous symmetry breaking via the Anderson-Higgs-Kibble mechanism, and th…
Majorana zero modes in graphene with trigonal warping
Balazs Dora, Miklos Gulacsi, Pasquale Sodano
We study the low energy properties of warped monolayer graphene, where the symmetry of the original honeycomb lattice reveals itself. The zero energy solutions are Majorana fermion…
Pairing of Cooper pairs in a Josephson junction network containing an impurity
D. Giuliano, P. Sodano
We show how to induce pairing of Cooper pairs (and, thus, superconductivity) as a result of local embedding of a quantum impurity in a Josephson network fabricable with conven…
Negativity as the Entanglement Measure to Probe the Kondo Regime in the Spin-Chain Kondo Model
Abolfazl Bayat, Pasquale Sodano, Sougato Bose
We study the entanglement of an impurity at one end of a spin chain with a block of spins using negativity as a true measure of entanglement to characterize the unique features of…
Kondo Cloud Mediated Long Range Entanglement After Local Quench in a Spin Chain
Pasquale Sodano, Abolfazl Bayat, Sougato Bose
We show that, in the gapless Kondo Regime, a single local quench at one end of a Kondo spin chain induces a fast and long lived oscillatory dynamics. This quickly establishes a hig…
Y-junction of superconducting Josephson chains
Domenico Giuliano, Pasquale Sodano
We show that, for pertinent values of the fabrication and control parameters, an attractive finite coupling fixed point emerges in the phase diagram of a Y-junction of superconduct…
Topological Order in Frustrated Josephson Junction Arrays
M. C. Diamantini, P. Sodano, C. A. Trugenberger
We show that electrically and magnetically frustrated Josephson junction arrays (JJAs) realize topological order with a non-trivial ground state degeneracy on manifolds with non-tr…