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Positivity conjecture for the massless time-like XX-chain correlation
Consider the massless time-like regime of the XX chain and the complex correlation function $(-1)^m\langle\sigma^-_1(0)\sigma^+_{m+1}(t)\rangle$ . Positivity conjecture. Both its re…
opencorrelation-functions nonequilibrium-dynamics xx-chain
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Positivity conjecture for the massless time-like XX-chain correlation