A5061219511- Quantum Information and Cryptography
- Quantum Computing Algorithms and Architecture
- Quantum and electron transport phenomena
- Quantum Mechanics and Applications
- Neural Networks and Reservoir Computing
- Quantum, superfluid, helium dynamics
- Quantum optics and atomic interactions
- Cold Atom Physics and Bose-Einstein Condensates
- Machine Learning in Materials Science
- Quantum many-body systems
University of Arizona
2020
Analog quantum simulation is widely considered a step on the path to fault tolerant computation. If based current noisy hardware, accuracy of an analog simulator will degrade after just few time steps, especially when simulating complex systems that are likely exhibit chaos. Here we describe small, highly accurate and its use run high fidelity simulations three different model Hamiltonians for $>100$ steps. While not scalable exponentially large Hilbert spaces, this platform provides...
Quantum simulators are widely seen as one of the most promising near-term applications quantum technologies. However, it remains unclear to what extent a noisy device can output reliable results in presence unavoidable imperfections. Here we propose framework characterize performance by linking robustness measured expectation values spectral properties observable, which turn be associated with its macroscopic or microscopic character. We show that, under general assumptions and on average...
Quantum computers must achieve large-scale, fault-tolerant operation to deliver on their promise of transformational processing power [1-4]. This will require thousands or millions high-fidelity quantum gates and similar numbers qubits [5]. Demonstrations using neutral-atom trapped manipulated by lasers have shown that this modality can provide high two-qubit gate (CZ) fidelities scalable [6-10]. However, the in these demonstrations are driven do not resolve individual qubits, with universal...
We report on the fault-tolerant operation of logical qubits a neutral atom quantum computer, with performance surpassing physical for multiple circuits including Bell states (12x error reduction), random (15x), and prototype Anderson Impurity Model ground state solver materials science applications (up to 6x, non-fault-tolerantly). The are implemented via [[4, 2, 2]] code (C4). Our work constitutes first complete realization benchmarking protocol proposed by Gottesman 2016 [1] demonstrating...
As noisy intermediate-scale quantum (NISQ) processors increase in size and complexity, their use as general purpose simulators will rely on algorithms based the Trotter-Suzuki expansion. We run simulations a small, highly accurate processor, show how one can optimize simulation accuracy by balancing algorithmic (Trotter) errors against native specific to hardware at hand. further study interplay between errors, Trotter emergence of chaos seen measurements time averaged...