Challenges and opportunities in quantum optimization

A Abbas, A Ambainis, B Augustino, A Bärtschi… - Nature Reviews …, 2024 - nature.com
Quantum computers have demonstrable ability to solve problems at a scale beyond brute-
force classical simulation. Interest in quantum algorithms has developed in many areas …

Quantum-centric supercomputing for materials science: A perspective on challenges and future directions

Y Alexeev, M Amsler, MA Barroca, S Bassini… - Future Generation …, 2024 - Elsevier
Computational models are an essential tool for the design, characterization, and discovery
of novel materials. Computationally hard tasks in materials science stretch the limits of …

The Adjoint Is All You Need: Characterizing Barren Plateaus in Quantum Ans\" atze

E Fontana, D Herman, S Chakrabarti, N Kumar… - arXiv preprint arXiv …, 2023 - arxiv.org
Using tools from the representation theory of compact Lie groups we formulate a theory of
Barren Plateaus (BPs) for parameterized quantum circuits where the observable lies in the …

[PDF][PDF] Early fault-tolerant quantum computing

A Katabarwa, K Gratsea, A Caesura, PD Johnson - PRX Quantum, 2024 - APS
In recent years, research in quantum computing has largely focused on two approaches:
near-term intermediate-scale quantum (NISQ) computing and future fault-tolerant quantum …

Quantum-enhanced greedy combinatorial optimization solver

M Dupont, B Evert, MJ Hodson, B Sundar, S Jeffrey… - Science …, 2023 - science.org
Combinatorial optimization is a broadly attractive area for potential quantum advantage, but
no quantum algorithm has yet made the leap. Noise in quantum hardware remains a …

Quantum optimization using a 127-qubit gate-model IBM quantum computer can outperform quantum annealers for nontrivial binary optimization problems

N Sachdeva, GS Hartnett, S Maity, S Marsh… - arXiv preprint arXiv …, 2024 - arxiv.org
We introduce a comprehensive quantum solver for binary combinatorial optimization
problems on gate-model quantum computers that outperforms any published alternative and …

[HTML][HTML] Scaling whole-chip QAOA for higher-order Ising spin glass models on heavy-hex graphs

E Pelofske, A Bärtschi, L Cincio, J Golden… - npj Quantum …, 2024 - nature.com
We show that the quantum approximate optimization algorithm (QAOA) for higher-order,
random coefficient, heavy-hex compatible spin glass Ising models has strong parameter …

Design and execution of quantum circuits using tens of superconducting qubits and thousands of gates for dense Ising optimization problems

FB Maciejewski, S Hadfield, B Hall, M Hodson… - Physical Review …, 2024 - APS
We develop a hardware-efficient ansatz for variational optimization, derived from existing
ansatzes in the literature, that parametrizes subsets of all interactions in the cost Hamiltonian …

Constrained optimization via quantum zeno dynamics

D Herman, R Shaydulin, Y Sun, S Chakrabarti… - Communications …, 2023 - nature.com
Constrained optimization problems are ubiquitous in science and industry. Quantum
algorithms have shown promise in solving optimization problems, yet none of the current …

Alignment between initial state and mixer improves QAOA performance for constrained optimization

Z He, R Shaydulin, S Chakrabarti, D Herman… - npj Quantum …, 2023 - nature.com
Quantum alternating operator ansatz (QAOA) has a strong connection to the adiabatic
algorithm, which it can approximate with sufficient depth. However, it is unclear to what …