Publications by authors named "Wojciech Mruczkiewicz"
The famous, yet unsolved, Fermi-Hubbard model for strongly-correlated electronic systems is a prominent target for quantum computers. However, accurately representing the Fermi-Hubbard ground state for large instances may be beyond the reach of near-term quantum hardware. Here we show experimentally that an efficient, low-depth variational quantum algorithm with few parameters can reproduce important qualitative features of medium-size instances of the Fermi-Hubbard model.
View Article and Find Full Text PDFQuantum many-body systems display rich phase structure in their low-temperature equilibrium states. However, much of nature is not in thermal equilibrium. Remarkably, it was recently predicted that out-of-equilibrium systems can exhibit novel dynamical phases that may otherwise be forbidden by equilibrium thermodynamics, a paradigmatic example being the discrete time crystal (DTC).
View Article and Find Full Text PDFArticle Synopsis
- Quantum scrambling spreads localized quantum information throughout a system, raising important questions in physics.
- The study uses a 53-qubit quantum processor to explore how operator spreading and operator entanglement behave during scrambling.
- Findings indicate that while operator spreading can be efficiently modeled classically, operator entanglement demands exponentially more resources to simulate, paving the way for future studies with quantum processors.