TY - JOUR
T1 - Resilient Infinite Randomness Criticality for a Disordered Chain of Interacting Majorana Fermions
AU - Chepiga, Natalia
AU - Laflorencie, Nicolas
PY - 2024
Y1 - 2024
N2 - The quantum critical properties of interacting fermions in the presence of disorder are still not fully understood. While it is well known that for Dirac fermions, interactions are irrelevant to the noninteracting infinite randomness fixed point (IRFP), the problem remains largely open in the case of Majorana fermions which further display a much richer disorder-free phase diagram. Here, pushing the limits of density matrix renormalization group simulations, we carefully examine the ground state of a Majorana chain with both disorder and interactions. Building on appropriate boundary conditions and key observables such as entanglement, energy gap, and correlations, we strikingly find that the noninteracting Majorana IRFP is very stable against finite interactions, in contrast with previous claims.
AB - The quantum critical properties of interacting fermions in the presence of disorder are still not fully understood. While it is well known that for Dirac fermions, interactions are irrelevant to the noninteracting infinite randomness fixed point (IRFP), the problem remains largely open in the case of Majorana fermions which further display a much richer disorder-free phase diagram. Here, pushing the limits of density matrix renormalization group simulations, we carefully examine the ground state of a Majorana chain with both disorder and interactions. Building on appropriate boundary conditions and key observables such as entanglement, energy gap, and correlations, we strikingly find that the noninteracting Majorana IRFP is very stable against finite interactions, in contrast with previous claims.
UR - http://www.scopus.com/inward/record.url?scp=85183979758&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.132.056502
DO - 10.1103/PhysRevLett.132.056502
M3 - Article
AN - SCOPUS:85183979758
SN - 0031-9007
VL - 132
JO - Physical review letters
JF - Physical review letters
IS - 5
M1 - 056502
ER -