@article{587cde08c64a479bb249ec58dc55c76a,
title = "Exact Results for a Boundary-Driven Double Spin Chain and Resource-Efficient Remote Entanglement Stabilization",
abstract = "We derive an exact solution for the steady state of a setup where two XX-coupled N-qubit spin chains (with possibly nonuniform couplings) are subject to boundary Rabi drives and common boundary loss generated by a waveguide (either bidirectional or unidirectional). For a wide range of parameters, this system has a pure entangled steady state, providing a means for stabilizing remote multiqubit entanglement without the use of squeezed light. Our solution also provides insights into a single boundary-driven dissipative XX spin chain that maps to an interacting fermionic model. The nonequilibrium steady state exhibits surprising correlation effects, including an emergent pairing of hole excitations that arises from dynamically constrained hopping. Our system could be implemented in a number of experimental platforms, including circuit QED.",
author = "Andrew Lingenfelter and Mingxing Yao and Andrew Pocklington and Wang, {Yu Xin} and Abdullah Irfan and Wolfgang Pfaff and Clerk, {Aashish A.}",
note = "This work was supported by the National Science Foundation QLCI HQAN (NSF Grant No. 2016136). A.L., A.P., M.Y., Y.-X.W., and A.A.C. acknowledge support from the Army Research Office under Grant No. W911NF-23-1-0077 and from the Simons Foundation through a Simons Investigator Award (Grant No. 669487). This work was completed in part with resources provided by the University of Chicago's Research Computing Center. We thank P. Rabl and J. Agust\u00ED for useful discussions. We also thank the anonymous referee, who pointed out the connection of our hole pairing construction to quantum scars and the existence of strong symmetries in a modified model with Creutz ladder-style couplings. This work was supported by the National Science Foundation QLCI HQAN (NSF Grant No. 2016136). A.\u2009L., A.\u2009P., M.\u2009Y., Y.-X.\u2009W., and A.\u2009A.\u2009C. acknowledge support from the Army Research Office under Grant No. W911NF-23-1-0077 and from the Simons Foundation through a Simons Investigator Award (Grant No. 669487). This work was completed in part with resources provided by the University of Chicago\u2019s Research Computing Center.",
year = "2024",
month = apr,
doi = "10.1103/PhysRevX.14.021028",
language = "English (US)",
volume = "14",
journal = "Physical Review X",
issn = "2160-3308",
publisher = "American Physical Society",
number = "2",
}