Gaussian repeater chains using only Gaussian operations and homodyne detection cannot beat direct transmission for the quantum capacity of pure-loss bosonic channels.
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An exact equation relates the entanglement of imperfect joint measurements to channel entanglement and the probability needed for unit-fidelity teleportation despite coherent errors.
Classical simulation algorithms for low-magic adaptive quantum circuits with high Pauli measurement rates, demonstrated on all-to-all monitored circuits with sub-extensive T-gates to study measurement-induced phase transitions.
citing papers explorer
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No-Go Theorem for Gaussian Quantum Repeaters from Fractional Extendibility
Gaussian repeater chains using only Gaussian operations and homodyne detection cannot beat direct transmission for the quantum capacity of pure-loss bosonic channels.
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Quantum teleportation with coherent error in Bell-state measurement
An exact equation relates the entanglement of imperfect joint measurements to channel entanglement and the probability needed for unit-fidelity teleportation despite coherent errors.
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Classical Simulations of Low Magic Quantum Dynamics
Classical simulation algorithms for low-magic adaptive quantum circuits with high Pauli measurement rates, demonstrated on all-to-all monitored circuits with sub-extensive T-gates to study measurement-induced phase transitions.