Analytic computation of logarithmic negativity and closed-form negativity cores for vacuum entanglement between two bounded regions in 1+1D free massless scalar QFT.
Finally, to obtain the subsystemA, we trace out the first site 5 (q′ 0, p′ 0), and are left with only discrete derivative quadra- turesq ′ in the interval
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The negativity core of a 1+1D massless scalar quantum field
Analytic computation of logarithmic negativity and closed-form negativity cores for vacuum entanglement between two bounded regions in 1+1D free massless scalar QFT.