112 citations · 633 across the 32 of their papers we have counts for
22 papers · 1 filter
Augmenting Imaginary-Time Evolution with Local Geometric Information
Carlos L. Benavides-Riveros, Prachi Sharma, Fedor Šimkovic +1
Imaginary-time evolution (ITE) underpins a broad family of algorithms for ground-state preparation in quantum simulation and quantum many-body physics. In these methods, convergenc…
Reinforcement Learning Assisted Quantum Simulation of Many-Body Excited States and Real-Time Dynamics
Jiaji Zhang, Lipeng Chen, Carlos L. Benavides-Riveros
The computation of electronic excited states and real-time quantum dynamics of many-fermion systems is among the most promising applications of near-term quantum computing. In this…
Neural Network Solution of Non-Markovian Quantum State Diffusion and Operator Construction of Quantum Stochastic Process
Jiaji Zhang, Carlos L. Benavides-Riveros, Lipeng Chen
Non-Markovian quantum state diffusion provides a wavefunction-based framework for modeling open quantum systems. In this work, we introduce a novel machine learning approach based…
Simulating Quantum Many-Body States with Neural-Network Exponential Ansatz
Weillei Zeng, Jiaji Zhang, Lipeng Chen +1
Preparing quantum many-body states on classical or quantum devices is a very challenging task that requires accounting for exponentially large Hilbert spaces. Although this complex…
Neural Quantum Propagators for Driven-Dissipative Quantum Dynamics
Jiaji Zhang, Carlos L. Benavides-Riveros, Lipeng Chen
Describing the dynamics of strong-laser driven open quantum systems is a very challenging task that requires the solution of highly involved equations of motion. While machine lear…
Exact Ansatz of Fermion-Boson Systems for a Quantum Device
Samuel Warren, Yuchen Wang, Carlos L. Benavides-Riveros +1
We present an exact ansatz for the eigenstate problem of mixed fermion-boson systems that can be implemented on quantum devices. Based on a generalization of the electronic contrac…
Artificial-intelligence-based surrogate solution of dissipative quantum dynamics: physics-informed reconstruction of the universal propagator
Jiaji Zhang, Carlos L. Benavides-Riveros, Lipeng Chen
The accurate (or even approximate) solution of the equations that govern the dynamics of dissipative quantum systems remains a challenging task for quantum science. While several a…
Quantum simulation of excited states from parallel contracted quantum eigensolvers
Carlos L. Benavides-Riveros, Yuchen Wang, Samuel Warren +1
Computing excited-state properties of molecules and solids is considered one of the most important near-term applications of quantum computers. While many of the current excited-st…
Extracting Many-Body Quantum Resources within One-Body Reduced Density Matrix Functional Theory
Carlos L. Benavides-Riveros, Tomasz Wasak, Alessio Recati
Quantum Fisher information (QFI) is a central concept in quantum sciences used to quantify the ultimate precision limit of parameter estimation, detect quantum phase transitions, w…
Refining the weighted subspace-search variational quantum eigensolver: compression of ansätze into a single pure state and optimization of weights
Cheng-Lin Hong, Luis Colmenarez, Lexin Ding +2
The weighted subspace-search variational quantum eigensolver (SSVQE) is a prominent algorithm for calculating excited-state properties of molecular quantum systems. In this work, w…
Excitations of Quantum Many-Body Systems via Purified Ensembles: A Unitary-Coupled-Cluster-based Approach
Carlos L. Benavides-Riveros, Lipeng Chen, Christian Schilling +2
State-average calculations based on mixture of states are increasingly being exploited across chemistry and physics as versatile procedures for addressing excitations of quantum ma…
Machine Learning Universal Bosonic Functionals
Jonathan Schmidt, Matteo Fadel, Carlos L. Benavides-Riveros
The one-body reduced density matrix plays a fundamental role in describing and predicting quantum features of bosonic systems, such as Bose-Einstein condensation. The recently…
Reduced Density Matrix Functional Theory for Bosons
Carlos L. Benavides-Riveros, Jakob Wolff, Miguel A. L. Marques +1
Based on a generalization of Hohenberg-Kohn's theorem, we propose a ground state theory for bosonic quantum systems. Since it involves the one-particle reduced density matrix a…
Implications of pinned occupation numbers for natural orbital expansions. I: Generalizing the concept of active spaces
Christian Schilling, Carlos L. Benavides-Riveros, Alexandre Lopes +2
The concept of active spaces simplifies the description of interacting quantum many-body systems by restricting to a neighbourhood of active orbitals around the Fermi level. The re…
On the time evolution of fermionic occupation numbers
Carlos L. Benavides-Riveros, Miguel A. L. Marques
We derive an equation for the time evolution of the natural occupation numbers for fermionic systems with more than two electrons. The evolution of such numbers is connected with t…
Natural Extension of Hartree-Fock through extremal -fermion information: Overview and application to the lithium atom
Carlos L. Benavides-Riveros, Christian Schilling
Fermionic natural occupation numbers do not only obey Pauli's exclusion principle but are even stronger restricted by so-called generalized Pauli constraints. Whenever given natura…
Relating correlation measures: the importance of the energy gap
Carlos L. Benavides-Riveros, Nektarios N. Lathiotakis, Christian Schilling +1
The concept of correlation is central to all approaches that attempt the description of many-body effects in electronic systems. Multipartite correlation is a quantum information t…
Reconstructing quantum states from single-party information
Christian Schilling, Carlos L. Benavides-Riveros, Péter Vrana
The possible compatibility of density matrices for single-party subsystems is described by linear constraints on their respective spectra. Whenever some of those quantum marginal c…
Why doubly excited determinants govern configuration interaction calculations of electron correlations
Carlos L. Benavides-Riveros, José M. Gracia-Bondía, Michael Springborg
Computational evidence shows that, when using natural orbitals to study (dynamical and non-dynamical) electron correlation, determinants with an odd number of excitations play a ne…
Quasipinning and selection rules for excitations in atoms and molecules
Carlos L. Benavides-Riveros, Michael Springborg
Postulated by Pauli to explain the electronic structure of atoms and molecules, the exclusion principle establishes an upper bound of 1 for the fermionic natural occupation numbers…
Quasi-pinning and entanglement in the lithium isoelectronic series
Carlos L. Benavides-Riveros, José M. Gracia-Bondía, Michael Springborg
The Pauli exclusion principle gives an upper bound of 1 on the natural occupation numbers. Recently there has been an intriguing amount of theoretical evidence that there is a plet…
Physical Wigner functions
Carlos L. Benavides-Riveros, José M. Gracia-Bondía
In spite of their potential usefulness, the characterizations of Wigner functions for Bose and Fermi statistics given by O'Connell and Wigner himself almost thirty years ago has dr…