NISQ computing: where are we and where do we go?

JWZ Lau, KH Lim, H Shrotriya, LC Kwek - AAPPS bulletin, 2022 - Springer
In this short review article, we aim to provide physicists not working within the quantum
computing community a hopefully easy-to-read introduction to the state of the art in the field …

Capacity and quantum geometry of parametrized quantum circuits

T Haug, K Bharti, MS Kim - PRX Quantum, 2021 - APS
To harness the potential of noisy intermediate-scale quantum devices, it is paramount to find
the best type of circuits to run hybrid quantum-classical algorithms. Key candidates are …

Variational quantum time evolution without the quantum geometric tensor

J Gacon, J Nys, R Rossi, S Woerner, G Carleo - Physical Review Research, 2024 - APS
Real-and imaginary-time quantum state evolutions are crucial in physics and chemistry for
exploring quantum dynamics, preparing ground states, and computing thermodynamic …

Subspace methods for electronic structure simulations on quantum computers

M Motta, W Kirby, I Liepuoniute, KJ Sung… - Electronic …, 2024 - iopscience.iop.org
Quantum subspace methods (QSMs) are a class of quantum computing algorithms where
the time-independent Schrödinger equation for a quantum system is projected onto a …

Optimal training of variational quantum algorithms without barren plateaus

T Haug, MS Kim - arxiv preprint arxiv:2104.14543, 2021 - arxiv.org
Variational quantum algorithms (VQAs) promise efficient use of near-term quantum
computers. However, training VQAs often requires an extensive amount of time and suffers …

Quantum subspace expansion algorithm for Green's functions

F Jamet, A Agarwal, I Rungger - arxiv preprint arxiv:2205.00094, 2022 - arxiv.org
We present an algorithm to compute Green's functions on quantum computers for interacting
electron systems, which is a challenging task on conventional computers. It uses a …

Fast-forwarding quantum simulation with real-time quantum Krylov subspace algorithms

CL Cortes, AE DePrince III, SK Gray - Physical Review A, 2022 - APS
Quantum subspace diagonalization (QSD) algorithms have emerged as a competitive family
of algorithms that avoid many of the optimization pitfalls associated with parameterized …

Noisy intermediate-scale quantum algorithm for semidefinite programming

K Bharti, T Haug, V Vedral, LC Kwek - Physical Review A, 2022 - APS
Semidefinite programs (SDPs) are convex optimization programs with vast applications in
control theory, quantum information, combinatorial optimization, and operational research …

High-fidelity dimer excitations using quantum hardware

NM Eassa, J Gibbs, Z Holmes, A Sornborger, L Cincio… - Physical Review B, 2024 - APS
The quantum simulation of entangled spin systems can play a central role in quantum
magnetic materials discovery. Additionally, the simulation of spectroscopic signatures, such …

Convex optimization for nonequilibrium steady states on a hybrid quantum processor

JWZ Lau, KH Lim, K Bharti, LC Kwek… - Physical Review Letters, 2023 - APS
Finding the transient and steady state properties of open quantum systems is a central
problem in various fields of quantum technologies. Here, we present a quantum-assisted …