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 …

Nonadiabatic landau–zener–stückelberg–majorana transitions, dynamics, and interference

V Ivakhnenko, SN Shevchenko, F Nori - Physics Reports, 2023 - Elsevier
Since the pioneering works by Landau, Zener, Stückelberg, and Majorana (LZSM), it has
been known that driving a quantum two-level system results in tunneling between its states …

Quantum optimization: Potential, challenges, and the path forward

A Abbas, A Ambainis, B Augustino, A Bärtschi… - arxiv preprint arxiv …, 2023 - arxiv.org
Recent advances in quantum computers are demonstrating the ability to solve problems at a
scale beyond brute force classical simulation. As such, a widespread interest in quantum …

Counterdiabaticity and the quantum approximate optimization algorithm

J Wurtz, PJ Love - Quantum, 2022 - quantum-journal.org
The quantum approximate optimization algorithm (QAOA) is a near-term hybrid algorithm
intended to solve combinatorial optimization problems, such as MaxCut. QAOA can be made …

Time scaling and quantum speed limit in non-Hermitian Hamiltonians

F Impens, FM d'Angelis, FA Pinheiro, D Guéry-Odelin - Physical Review A, 2021 - APS
We report on a time-scaling technique to enhance the performances of quantum control
protocols in non-Hermitian systems. The considered time scaling involves no extra …

Leakage in restless quantum gate calibration

CJ Haupt, DJ Egger - Physical Review A, 2023 - APS
Quantum computers require high-fidelity quantum gates. These gates are obtained by
routine calibration tasks that eat into the availability of cloud-based devices. Restless circuit …

Effective Landau-Zener transitions in the circuit dynamical Casimir effect with time-varying modulation frequency

AV Dodonov, B Militello, A Napoli, A Messina - Physical Review A, 2016 - APS
We consider the dissipative single-qubit circuit QED architecture in which the atomic
transition frequency undergoes a weak external time modulation. For sinusoidal modulation …

Set of holonomic and protected gates on topological qubits for a realistic quantum computer

AR Klots, LB Ioffe - Physical Review B, 2021 - APS
In recent years qubit designs such as transmons have approached fidelities of up to 0.999.
However, even these devices are still insufficient for realizing quantum error correction …

Adiabatic quantum learning

N Ma, W Chu, PZ Zhao, J Gong - Physical Review A, 2023 - APS
Quantum machine learning has attracted considerable interest due to its potential to improve
certain learning tasks. In conventional quantum machine learning, the output is the …

Tunable Landau-Zener transitions using continuous-and chirped-pulse-laser couplings

F Sarreshtedari, M Hosseini - Physical Review A, 2017 - APS
The laser coupled Landau-Zener avoided crossing has been investigated with an aim
towards obtaining the laser source parameters for precise controlling of the state dynamics …