Figure 5From: Finding critical states of enhanced memory capacity in attractive cold bosonsExcitation energy as a function of λ for \(N \rightarrow \infty \) derived in two different methods. In both cases, we observe a gapless excitation at \(\lambda _{lm} \approx 1.792\). Stable excitations only exist for \(\lambda \geq \lambda _{lm}\). As is clear from the Hamiltonian (33), the energy unit is \(\frac{4\pi ^{2}\hbar ^{2}}{2m L^{2}}\)Back to article page