3 papers
quant-ph2026
Rapid mixing for high-temperature Gibbs states with arbitrary external fields
Ainesh Bakshi, Xinyu Tan
Gibbs states are a natural model of quantum matter at thermal equilibrium. We investigate the role of external fields in shaping the entanglement structure and computational comple…
quant-ph2025
Haar random codes attain the quantum Hamming bound, approximately
Fermi Ma, Xinyu Tan, John Wright
We study the error correcting properties of Haar random codes, in which a -dimensional code space is chosen at random from the Haar distr…
quant-ph2025
Beating full state tomography for unentangled spectrum estimation
Angelos Pelecanos, Xinyu Tan, Ewin Tang +1
How many copies of a mixed state are needed to learn its spectrum? To date, the best known algorithms for spectrum estimation require as many copies…