4 papers
Quantum information loss
James Fullwood, Wu-zhong Guo, Boyu Yang
We introduce a measure of information loss for any quantum process that may be modeled by a prepare-evolve-measure scenario: Alice prepares an ensemble of states that gets sent via…
Spacetime Density Matrix: Formalism and Properties
Wu-zhong Guo
In this paper, we develop the general formalism and properties of the spacetime density matrix, which captures correlations among different Cauchy surfaces and can be regarded as a…
Quantum Entanglement Autodistillation in Baryon Pair Decays
Hai-Long Feng, Hao Tang, Wu-zhong Guo +1
We study the spin-entangled mixed state of a spin-1/2 baryon-antibaryon pair produced in the process e+e- to J/psi, psi(2S) to BBbar. We demonstrate that the spin entanglement of t…
Measuring the Black Hole Interior from the Exterior
Wu-zhong Guo
In this essay, we argue that an observer outside the horizon can reconstruct the geometry of a black hole's interior through external measurements. This procedure builds on recent…