139 citations · 458 across the 14 of their papers we have counts for
14 papers
Analytical solution of a free-fermion chain with time-dependent ramps
Viktor Eisler, Riccarda Bonsignori, Stefano Scopa
We provide an exact analytical solution of the single-particle Schrödinger equation for a chain of non-interacting fermions subject to a time-dependent linear potential, with its s…
Entanglement Hamiltonian after a local quench
Riccarda Bonsignori, Viktor Eisler
We investigate the dynamics of the entanglement Hamiltonian in a system of one-dimensional free fermions, following a local joining quench of two initially disconnected half-chains…
Long-distance genuine multipartite Entanglement between Magnetic Defects in Spin Chains
Mirko Consiglio, Jovan Odavić, Riccarda Bonsignori +5
We investigate the emergence and properties of long-distance genuine multipartite entanglement, induced via three localized magnetic defects, in a one-dimensional transverse-field…
Entanglement Hamiltonian and orthogonal polynomials
Pierre-Antoine Bernard, Riccarda Bonsignori, Viktor Eisler +2
We study the entanglement Hamiltonian for free-fermion chains with a particular form of inhomogeneity. The hopping amplitudes and chemical potentials are chosen such that the singl…
Entanglement Hamiltonian for inhomogeneous free fermions
Riccarda Bonsignori, Viktor Eisler
We study the entanglement Hamiltonian for the ground state of one-dimensional free fermions in the presence of an inhomogeneous chemical potential. In particular, we consider a lat…
Boundary Symmetry Breaking in CFT and the String Order Parameter
Riccarda Bonsignori, Luca Capizzi, Pantelis Panopoulos
We consider the ground state of a one-dimensional critical quantum system carrying a global symmetry in the bulk, which is explicitly broken by its boundary conditions. We probe th…
Analytical results for the entanglement dynamics of disjoint blocks in the XY spin chain
Gilles Parez, Riccarda Bonsignori
The study of the dynamics of entanglement measures after a quench has become a very active area of research in the last two decades, motivated by the development of experimental te…
Dynamics of charge-imbalance-resolved entanglement negativity after a quench in a free-fermion model
Gilles Parez, Riccarda Bonsignori, Pasquale Calabrese
The presence of a global internal symmetry in a quantum many-body system is reflected in the fact that the entanglement between its subparts is endowed with an internal structure,…
Exact quench dynamics of symmetry resolved entanglement in a free fermion chain
Gilles Parez, Riccarda Bonsignori, Pasquale Calabrese
The study of the entanglement dynamics plays a fundamental role in understanding the behaviour of many-body quantum systems out of equilibrium. In the presence of a globally conser…
Symmetry decomposition of negativity of massless free fermions
Sara Murciano, Riccarda Bonsignori, Pasquale Calabrese
We consider the problem of symmetry decomposition of the entanglement negativity in free fermionic systems. Rather than performing the standard partial transpose, we use the partia…
Quasiparticle dynamics of symmetry resolved entanglement after a quench: the examples of conformal field theories and free fermions
Gilles Parez, Riccarda Bonsignori, Pasquale Calabrese
The time evolution of the entanglement entropy is a key concept to understand the structure of a non-equilibrium quantum state. In a large class of models, such evolution can be un…
Boundary effects on symmetry resolved entanglement
Riccarda Bonsignori, Pasquale Calabrese
We study the symmetry resolved entanglement entropies in one-dimensional systems with boundaries. We provide some general results for conformal invariant theories and then move to…
Symmetry resolved entanglement in free fermionic systems
Riccarda Bonsignori, Paola Ruggiero, Pasquale Calabrese
We consider the symmetry resolved Rényi entropies in the one dimensional tight binding model, equivalent to the spin-1/2 XX chain in a magnetic field. We exploit the generalised Fi…
Yang-Lee Zeros of the Yang-Lee Model
Giuseppe Mussardo, Riccarda Bonsignori, Andrea Trombettoni
To understand the distribution of the Yang-Lee zeros in quantum integrable field theories we analyse the simplest of these systems given by the two-dimensional Yang-Lee model. The…