Exact Results for a Boundary-Driven Double Spin Chain and Resource-Efficient Remote Entanglement Stabilization
arxiv(2023)
摘要
We derive an exact solution for the steady state of a setup where two
XX-coupled N-qubit spin chains (with possibly non-uniform 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 multi-qubit 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
non-equilibrium 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.
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