J. I. Cirac

Multiphoton-scattering theory and generalized master equations

2015 · Physical Review A

The analysis of photon scattering is a major challenge in the multiphoton regime. A framework based on a path-integral formalism provides a route to explore such dynamics, helping to investigate the quantum statistics of photons …

Faster ground state preparation and high-precision ground energy estimation with fewer qubits

2019 · Journal of Mathematical Physics

We propose a general-purpose quantum algorithm for preparing ground states of quantum Hamiltonians from a given trial state. The algorithm is based on techniques recently developed in the context of solving the quantum linear system …

Enhancing Generative Models via Quantum Correlations

2022 · Physical Review X

Generative modeling using samples drawn from the probability distribution constitutes a powerful approach for unsupervised machine learning. Quantum mechanical systems can produce probability distributions that exhibit quantum correlations which are difficult to capture using classical …

Simulability transitions in continuous-time dynamics of local open quantum systems

2021 · arXiv (Cornell University)

We analyze the complexity of classically simulating continuous-time dynamics of locally interacting quantum spin systems with a constant rate of entanglement breaking noise. We prove that a polynomial time classical algorithm can be used to …

Cross-Platform Verification in Quantum Networks

2022 · arXiv (Cornell University)

Intermediate-scale quantum devices are becoming more reliable, and may soon be harnessed to solve useful computational tasks. At the same time, common classical methods used to verify their computational output become intractable due to a …