TY  - JOUR
AU  - Botzung, T.
AU  - Hagenmüller, D.
AU  - Masella, G.
AU  - Dubail, J.
AU  - Defenu, N.
AU  - Trombettoni, A.
AU  - Pupillo, G.
TI  - Effects of energy extensivity on the quantum phases of long-range interacting systems
JO  - Physical review / B
VL  - 103
IS  - 15
SN  - 1098-0121
CY  - Woodbury, NY
PB  - Inst.
M1  - FZJ-2021-06108
SP  - 155139
PY  - 2021
AB  - We investigate the ground state properties of one-dimensional hard-core bosons interacting via a variable long-range potential using the density matrix renormalization group. We show that restoring energy extensivity in the system, which is done by rescaling the interaction potential with a suitable size-dependent factor known as Kac's prescription, has a profound influence on the low-energy properties in the thermodynamic limit. While an insulating phase is found in the absence of Kac's rescaling, the latter leads to a new metallic phase that does not fall into the conventional Luttinger liquid paradigm. We discuss a scheme for the observation of this new phase using cavity-mediated long-range interactions with cold atoms. Our findings raise fundamental questions on how to study the thermodynamics of long-range interacting quantum systems.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000646763900001
DO  - DOI:10.1103/PhysRevB.103.155139
UR  - https://juser.fz-juelich.de/record/904538
ER  -