Publications by authors named "David A Buell"
Quantum 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).
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- 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.
The promise of quantum computers is that certain computational tasks might be executed exponentially faster on a quantum processor than on a classical processor. A fundamental challenge is to build a high-fidelity processor capable of running quantum algorithms in an exponentially large computational space. Here we report the use of a processor with programmable superconducting qubits to create quantum states on 53 qubits, corresponding to a computational state-space of dimension 2 (about 10).
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