Emergent SU(N) symmetry in disordered SO(N) spin chains. QUITO, Victor L.; LOPES, Pedro L. S.; HOYOS, José Abel; MIRANDA, Eduardo.
Abstract: Strongly disordered spin chains invariant under the SO(N) group are shown to display randomsinglet phases with emergent SU(N) symmetry without ne tuning. The phases with emergent SU(N) symmetry are of two kinds: one has a ground state formed of randomly distributed singlets of strongly bound pairs of SO(N) spins (a `mesonic' phase), while the other has a ground state composed of singlets made out of strongly bound integer multiples of N SO(N) spins (a `baryonic' phase). The established mechanism is general and we put forward the cases of N =2; 3; 4 and 6 as prime candidates for experimental realizations in material compounds and cold-atoms systems. We display universal temperature scaling and critical exponents for susceptibilities distinguishing these phases and characterizing the enlarging of the microscopic symmetries at low energies.
European Physical Journal B
v. 93, n. 1, p. 17-1-17-6 - Ano: 2020
Fator de Impacto: 1,440
@article={002987431,author = {QUITO, Victor L.; LOPES, Pedro L. S.; HOYOS, José Abel; MIRANDA, Eduardo.},title={Emergent SU(N) symmetry in disordered SO(N) spin chains},journal={European Physical Journal B},note={v. 93, n. 1, p. 17-1-17-6},year={2020}}
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Abstract: Strongly disordered spin chains invariant under the SO(N) group are shown to display randomsinglet phases with emergent SU(N) symmetry without ne tuning. The phases with emergent SU(N) symmetry are of two kinds: one has a ground state formed of randomly distributed singlets of strongly bound pairs of SO(N) spins (a `mesonic' phase), while the other has a ground state composed of singlets made out of strongly bound integer multiples of N SO(N) spins (a `baryonic' phase). The established mechanism is general and we put forward the cases of N =2; 3; 4 and 6 as prime candidates for experimental realizations in material compounds and cold-atoms systems. We display universal temperature scaling and critical exponents for susceptibilities distinguishing these phases and characterizing the enlarging of the microscopic symmetries at low energies.
@article={002987431,author = {QUITO, Victor L.; LOPES, Pedro L. S.; HOYOS, José Abel; MIRANDA, Eduardo.},title={Emergent SU(N) symmetry in disordered SO(N) spin chains},journal={European Physical Journal B},note={v. 93, n. 1, p. 17-1-17-6},year={2020}}