Symmetry-based qubits allow Grover four-ports to serve as deterministic linear-optical CNOT gates with no post-selection or ancillae required.
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Random global pulses in Rydberg chains generate states with Haar-like statistics at long times for weak interactions, while optimal control prepares generic symmetric states with infidelities from 10^{-5} to 3e-2 for 9 spins, worsening with entanglement entropy.
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Deterministic linear-optical computing with symmetry-based qubits
Symmetry-based qubits allow Grover four-ports to serve as deterministic linear-optical CNOT gates with no post-selection or ancillae required.
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Random-State Generation and Preparation Complexity in Rydberg Atom Arrays
Random global pulses in Rydberg chains generate states with Haar-like statistics at long times for weak interactions, while optimal control prepares generic symmetric states with infidelities from 10^{-5} to 3e-2 for 9 spins, worsening with entanglement entropy.