Subspace-Search Quantum Imaginary Time Evolution for Excited State Computations
Quantum systems in excited states are attracting significant interest with the advent of noisy
intermediate-scale quantum (NISQ) devices. While ground states of small molecular systems …
intermediate-scale quantum (NISQ) devices. While ground states of small molecular systems …
A circuit-generated quantum subspace algorithm for the variational quantum eigensolver
Recent research has shown that wavefunction evolution in real and imaginary time can
generate quantum subspaces with significant utility for obtaining accurate ground state …
generate quantum subspaces with significant utility for obtaining accurate ground state …
Systematic input scheme for many-boson Hamiltonians with applications to the two-dimensional theory
W Du, JP Vary - Physical Review D, 2025 - APS
We develop a novel, systematic input scheme for many-boson Hamiltonians in order to solve
field theory problems within the light-front Hamiltonian formalism via quantum computing …
field theory problems within the light-front Hamiltonian formalism via quantum computing …
A Quantum Eigenvalue Solver Based on Tensor Networks
O Leimkuhler, KB Whaley - arxiv preprint arxiv:2404.10223, 2024 - arxiv.org
We introduce a hybrid quantum-classical eigenvalue solver that constructs a wavefunction
ansatz from a linear combination of matrix product states in rotated orbital bases, enabling …
ansatz from a linear combination of matrix product states in rotated orbital bases, enabling …
Diagnosing local minima and accelerating convergence of variational quantum eigensolvers with quantum subspace techniques
MR Hirsbrunner, JW Mullinax, Y Shen… - arxiv preprint arxiv …, 2024 - arxiv.org
Recent research has shown that wavefunction evolution in real-and imaginary-time can
generate quantum subspaces with significant utility for obtaining accurate ground state …
generate quantum subspaces with significant utility for obtaining accurate ground state …
Cheaper and more noise-resilient quantum state preparation using eigenvector continuation
Subspace methods are powerful, noise-resilient methods that can effectively prepare ground
states on quantum computers. The challenge is to get a subspace with a small condition …
states on quantum computers. The challenge is to get a subspace with a small condition …
Quantum subspace expansion approach for simulating dynamical response functions of Kitaev spin liquids
We develop a quantum simulation-based approach for studying properties of strongly
correlated magnetic materials at increasing scale. We consider a paradigmatic example of a …
correlated magnetic materials at increasing scale. We consider a paradigmatic example of a …