Towards quantum computing phase diagrams of gauge theories with thermal pure quantum states

Z Davoudi, N Mueller, C Powers - Physical Review Letters, 2023 - APS
The phase diagram of strong interactions in nature at finite temperature and chemical
potential remains largely theoretically unexplored due to inadequacy of Monte-Carlo–based …

Quantum thermal state preparation

CF Chen, MJ Kastoryano, FGSL Brandão… - arXiv preprint arXiv …, 2023 - arxiv.org
Preparing ground states and thermal states is essential for simulating quantum systems on
quantum computers. Despite the hope for practical quantum advantage in quantum …

Measuring the Loschmidt amplitude for finite-energy properties of the Fermi-Hubbard model on an ion-trap quantum computer

K Hémery, K Ghanem, E Crane, SL Campbell… - PRX Quantum, 2024 - APS
Calculating the equilibrium properties of condensed-matter systems is one of the promising
applications of near-term quantum computing. Recently, hybrid quantum-classical time …

Phase-sensitive quantum measurement without controlled operations

Y Yang, A Christianen, MC Bañuls, DS Wild, JI Cirac - Physical Review Letters, 2024 - APS
Many quantum algorithms rely on the measurement of complex quantum amplitudes.
Standard approaches to obtain the phase information, such as the Hadamard test, give rise …

Probing finite-temperature observables in quantum simulators of spin systems with short-time dynamics

A Schuckert, A Bohrdt, E Crane, M Knap - Physical Review B, 2023 - APS
Preparing finite-temperature states in quantum simulators of spin systems, such as trapped
ions or Rydberg atoms in optical tweezers, is challenging due to their almost perfect …

Hamiltonian dynamics on digital quantum computers without discretization error

E Granet, H Dreyer - npj Quantum Information, 2024 - nature.com
We introduce an algorithm to compute expectation values of time-evolved observables on
digital quantum computers that requires only bounded average circuit depth to reach …

Heisenberg-limited metrology with perturbing interactions

C Yin, A Lucas - Quantum, 2024 - quantum-journal.org
We show that it is possible to perform Heisenberg-limited metrology on GHZ-like states, in
the presence of generic spatially local, possibly strong interactions during the measurement …

Energy-filtered random-phase states as microcanonical thermal pure quantum states

K Seki, S Yunoki - Physical Review B, 2022 - APS
We propose a method to calculate finite-temperature properties of a quantum many-body
system for a microcanonical ensemble by introducing a pure quantum state named here an …

Temperature-induced disorder-free localization

JC Halimeh, P Hauke, J Knolle, F Grusdt - arXiv preprint arXiv:2206.11273, 2022 - arxiv.org
Disorder-free localization is a paradigm of strong ergodicity breaking that has been shown to
occur in global quenches of lattice gauge theories when the system is initialized in a …

Robust extraction of thermal observables from state sampling and real-time dynamics on quantum computers

K Ghanem, A Schuckert, H Dreyer - Quantum, 2023 - quantum-journal.org
Simulating properties of quantum materials is one of the most promising applications of
quantum computation, both near-and long-term. While real-time dynamics can be …