36 citations · 44 across the 2 of their papers we have counts for
5 papers · 1 filter
Single-ancilla ground state preparation via Lindbladians
Zhiyan Ding, Chi-Fang Chen, Lin Lin
We design a quantum algorithm for ground state preparation in the early fault tolerant regime. As a Monte Carlo-style quantum algorithm, our method features a Lindbladian where the…
Quantum Thermal State Preparation
Chi-Fang Chen, Michael J. Kastoryano, Fernando G. S. L. Brandão +1
Preparing ground states and thermal states is essential for simulating quantum systems on quantum computers. Despite the hope for practical quantum advantage in quantum simulation,…
Speed limits and locality in many-body quantum dynamics
Chi-Fang Chen, Andrew Lucas, Chao Yin
We review the mathematical speed limits on quantum information processing in many-body systems. After the proof of the Lieb-Robinson Theorem in 1972, the past two decades have seen…
Concentration of OTOC and Lieb-Robinson velocity in random Hamiltonians
Chi-Fang Chen
The commutator between operators at different space and time has been a diagnostic for locality of unitary evolution. Most existing results are either for specific tractable (rando…
Finite speed of quantum scrambling with long range interactions
Chi-Fang Chen, Andrew Lucas
In a locally interacting many-body system, two isolated qubits, separated by a large distance , become correlated and entangled with each other at a time . This finit…