39 citations · 190 across the 16 of their papers we have counts for
16 papers
Genuine multientropy, dihedral invariants and Lifshitz theory
Clément Berthière, Paul Gaudin
Multi-invariants are local-unitary invariants of state replicas introduced as potential probes of multipartite entanglement and correlations in quantum many-body systems. In this p…
Tripartite entanglement dynamics following a quantum quench
Clément Berthiere
We investigate the dynamics of multipartite entanglement after quenches from initial states which generate multiplets of quasiparticle excitations beyond the usual pair structure.…
Geometric expansion of fluctuations and average shadows
Clément Berthière, Benoit Estienne, Jean-Marie Stéphan +1
Fluctuations of observables provide unique insights into the nature of physical systems, and their study stands as a cornerstone of both theoretical and experimental science. Gener…
Reflected entropy and Markov gap in Lifshitz theories
Clément Berthiere, Bin Chen, Hongjie Chen
We study the reflected entropy in --dimensional Lifshitz field theory whose groundstate is described by a quantum mechanical model. Starting from tripartite Lifshitz grounds…
Reflected entropy and computable cross-norm negativity: Free theories and symmetry resolution
Clément Berthiere, Gilles Parez
We investigate a separability criterion based on the computable cross-norm (CCNR), and a related quantity called the CCNR negativity. We introduce a reflected version of the CCNR n…
Separability and entanglement of resonating valence-bond states
Gilles Parez, Clément Berthiere, William Witczak-Krempa
We investigate separability and entanglement of Rokhsar-Kivelson (RK) states and resonating valence-bond (RVB) states. These states play a prominent role in condensed matter physic…
Full-counting statistics of corner charge fluctuations
Clément Berthiere, Benoit Estienne, Jean-Marie Stéphan +1
Outcomes of measurements are characterized by an infinite family of generalized uncertainties, or cumulants, which provide information beyond the mean and variance of the observabl…
Entanglement of skeletal regions
Clément Berthiere, William Witczak-Krempa
The entanglement entropy (EE) encodes key properties of quantum many-body systems. It is usually calculated for subregions of finite volume (or area in 2d). In this work, we study…
Entanglement and separability in continuum Rokhsar-Kivelson states
Christian Boudreault, Clement Berthiere, William Witczak-Krempa
We study a vast family of continuum Rokhsar-Kivelson (RK) states, which have their groundstate encoded by a local quantum field theory. These describe certain quantum magnets, and…
Topological reflected entropy in Chern-Simons theories
Clément Berthiere, Hongjie Chen, Yuefeng Liu +1
We study the reflected entropy between two spatial regions in -dimensional Chern-Simons theories. Taking advantage of its replica trick formulation, the reflected entropy is…
Relating bulk to boundary entanglement
Clément Berthiere, William Witczak-Krempa
Quantum many-body systems have a rich structure in the presence of boundaries. We study the groundstates of conformal field theories (CFTs) and Lifshitz field theories in the prese…
Boundary-corner entanglement for free bosons
Clement Berthiere
In quantum field theories defined on a spacetime with boundaries, the entanglement entropy exhibits subleading, boundary-induced corrections to the ubiquitous area law. At critical…
The quantum fate of black hole horizons
Clement Berthiere, Debajyoti Sarkar, Sergey N. Solodukhin
The presence of a horizon is the principal marker for black holes as they appear in the classical theory of gravity. In General Relativity (GR), horizons have several defining prop…
Holographic calculation of entanglement entropy in the presence of boundaries
Amin Faraji Astaneh, Clement Berthiere, Dmitri Fursaev +1
When a spacetime has boundaries, the entangling surface does not have to be necessarily compact and it may have boundaries as well. Then there appear a new, boundary, contribution…
Boundary effects in entanglement entropy
Clement Berthiere, Sergey N. Solodukhin
We present a number of explicit calculations of Renyi and entanglement entropies in situations where the entangling surface intersects the boundary in -dimensional Minkowski spa…
Comparison theorems for causal diamonds
Clement Berthiere, Gary Gibbons, Sergey N. Solodukhin
We formulate certain inequalities for the geometric quantities characterizing causal diamonds in curved and Minkowski spacetimes. These inequalities involve the red-shift factor wh…