105 citations · 540 across the 25 of their papers we have counts for
25 papers
Quantum Walks on Arbitrary Spatial Networks with Rydberg Atoms
Gabriel Almeida, Raul Santos, Lara Janiurek +1
Rydberg atoms provide a highly promising platform for quantum computation, leveraging their strong tunable interactions to encode and manipulate information in the electronic state…
Enhancing Quantum Annealing via entanglement distribution
Raúl Santos, Lorenzo Buffoni, Yasser Omar
Quantum Annealing has proven to be a powerful tool to tackle several optimization problems. However, its performance is severely impacted by the limited connectivity of the underly…
Towards near-term quantum simulation of materials
Laura Clinton, Toby Cubitt, Brian Flynn +6
Simulation of materials is one of the most promising applications of quantum computers. On near-term hardware the crucial constraint on these simulations is circuit depth. Many qua…
Observing ground-state properties of the Fermi-Hubbard model using a scalable algorithm on a quantum computer
Stasja Stanisic, Jan Lukas Bosse, Filippo Maria Gambetta +5
The famous, yet unsolved, Fermi-Hubbard model for strongly-correlated electronic systems is a prominent target for quantum computers. However, accurately representing the Fermi-Hub…
Strong zero modes from geometric chirality in quasi-one-dimensional Mott insulators
Raul A. Santos, Benjamin Béri
Strong zero modes provide a paradigm for quantum many-body systems to encode local degrees of freedom that remain coherent far from the ground state. Example systems include $\math…
Multidimensional dark space and its underlying symmetries: towards dissipation-protected qubits
Raul A. Santos, Fernando Iemini, Alex Kamenev +1
Quantum systems are always subject to interactions with an environment, typically resulting in decoherence and distortion of quantum correlations. It has been recently shown that a…
Fractional topological insulator precursors in spin-orbit fermion ladders
Raul A. Santos, Benjamin Béri
We study precursor states of fractional topological insulators (FTIs) in interacting fermionic ladders with spin-orbit coupling. Within a microscopically motivated bosonization app…
Interplay between intrinsic and emergent topological protection on interacting helical modes
Raul A. Santos, D. B. Gutman, Sam T. Carr
The interplay between topology and interactions on the edge of a two dimensional topological insulator with time reversal symmetry is studied. We consider a simple non-interacting…
Supersymmetry in the Fractional Quantum Hall Regime
Eran Sagi, Raul A. Santos
Supersymmetry (SUSY) is a symmetry transforming bosons to fermions and vice versa. Indications of its existence have been extensively sought after in high-energy experiments. Howev…
Interaction induced topological protection in one-dimensional conductors
Nikolaos Kainaris, Raul A. Santos, D. B. Gutman +1
We discuss two one-dimensional model systems -- the first is a single channel quantum wire with Ising anisotropy, while the second is two coupled helical edge states. We show that…
Negativity in the Generalized Valence Bond Solid State
Raul A. Santos, V. Korepin
Using a graphical presentation of the spin one dimensional Valence Bond Solid (VBS) state, based on the representation theory of the Lie-algebra of spins, we compute th…
Phase diagram of two interacting helical states
Raul A. Santos, D. B. Gutman, Sam T. Carr
We consider two coupled time reversal invariant helical edge modes of the same helicity, such as would occur on two stacked quantum spin Hall insulators. In the presence of interac…
Energy transport in the Anderson insulator
D. B. Gutman, I. V. Protopopov, A. L. Burin +3
We study the heat conductivity in Anderson insulators in the presence of power-law interaction. Particle-hole excitations built on localized electron states are viewed as two-level…
Bulk Entanglement Spectrum in Gapped Spin Ladders
Raul A. Santos, Chao-Ming Jian, Rex Lundgren
We study the bulk entanglement of a series of gapped ground states of spin ladders, representative of the Haldane phase. These ground states of spin ladders generalize the va…
Interaction Protected Topological Insulators with Time Reversal Symmetry
Raul A. Santos, D. B. Gutman
Anderson's localization on the edge of two dimensional time reversal (TR) topological insulator (TI) is studied. For the non-interacting case the topological protection acts accord…
Fractional Topological Insulators: from sliding Luttinger Liquids to Chern-Simons theory
Raul A. Santos, Chia-Wei Huang, Yuval Gefen +1
The sliding Luttinger liquids (LL) approach is applied to study fractional topological insulators (FTI). We show that FTI is the low energy fixed point of the theory for realistic…
Entanglement of a alternating bipartition in spin chains: Relation with classical integrable models
Raul A. Santos
We study the entanglement properties of a class of ground states defined by matrix product states, which are generalizations of the valence bond solid (VBS) state in one dimension.…
Entanglement Entropy in 2D Non-abelian Pure Gauge Theory
Andrey Gromov, Raul A. Santos
We compute the Entanglement Entropy (EE) of a bipartition in 2D pure non-abelian gauge theory. We obtain a general expression for EE on an arbitrary Riemann surface. We find…
Bulk-Edge correspondence of entanglement spectrum in 2D spin ground states
Raul A. Santos
General local spin ground states, described by a Valence Bond Solid (VBS) on a two dimensional lattice are studied. The norm of these ground states is mapped to a classical O(3…
Quantum phase transition in a multicomponent anyonic Lieb-Liniger model
Raul A. Santos, Francis N. C. Paraan, Vladimir E. Korepin
We study a one-dimensional multicomponent anyon model that reduces to a multicomponent Lieb-Liniger gas of impenetrable bosons (Tonks-Girardeau gas) for vanishing statistics parame…
Entanglement spectra of q-deformed higher spin VBS states
Raul A. Santos, Francis N. C. Paraan, Vladimir E. Korepin +1
We calculate the reduced density matrix of a block of integer spin-S's in a q-deformed valence-bond-solid (VBS) state. This matrix is diagonalized exactly for an infinitely long bl…
Entanglement spectra of the q-deformed Affleck-Kennedy-Lieb-Tasaki model and matrix product states
Raul A. Santos, Francis N. C. Paraan, Vladimir E. Korepin +1
We exactly calculate the reduced density matrix of matrix product states (MPS). Our compact result enables one to perform analytic studies of entanglement in MPS. In particular, we…
Entanglement of disjoint blocks in the one dimensional Spin 1 VBS
Raul A. Santos, Vladimir Korepin
Starting with the valence bond solid (VBS) ground state of the 1D AKLT Hamiltonian, we make a partition of the system in 2 subsystems and , where is a block of conse…
Negativity for two blocks in the one dimensional Spin 1 AKLT model
Raul A. Santos, V. Korepin, Sougato Bose
In this paper we compute the entanglement, as quantified by negativity, between two blocks of length and , separated by sites in the one dimensional spin-1 AKLT mode…