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Nonequilibrium entanglement between levitated masses under optimal control
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abstract
We present a protocol that maximizes unconditional entanglement generation between two masses interacting directly through $1/r^{n}$ potential. The protocol combines optimal quantum control of continuously measured masses with their non-equilibrium dynamics, driven by a time-dependent interaction strength. Applied to a pair of optically trapped sub-micron particles coupled via electrostatic interaction, our protocol enables unconditional entanglement generation at the fundamental limit of the conditional state and with an order of magnitude smaller interaction between the masses compared to the existing steady-state approaches.
Forward citations
Cited by 3 Pith papers
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Dark Optical Trapping of Resonant Transition-Metal Dichalcogenide Particles
Mie-theory calculations show magnetic-quadrupole dark trapping of WS2 particles (mass ~5e11 amu) yields Γ/Ω ≃ 0.02 and low internal heating, extending coherence ~1000× versus equal-mass silica in bright traps.
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Entangling two levitated particles in free space via trap modulation and Bayesian feedback
Frequency-modulated trapping plus Kalman-filter feedback creates steady-state entanglement between two levitated nanoparticles with weak Coulomb coupling and low measurement efficiency.
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