Multiple metastable states in an off-lattice Potts model

Farías, Constanza; Davis, Sergio

doi:10.1016/j.physa.2021.126215

Cited by 4 publications

(1 citation statement)

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“…Model Hamiltonians are theoretical tools that are often useful in simulating the key physics associated with large-scale, highly-correlated systems. They are capable of modeling an array of quantum phases and many-body phenomena such as phase transitions [1][2][3][4][5], superconductivity [6][7][8][9][10], quantum magnetism [11][12][13][14], exciton condensation [15][16][17][18][19][20][21], lattice-like systems [22,23], etc. Additionally, model Hamiltonians which encompass nontrivial physics are often useful as benchmarks for theoretical tools such as many-body approximations [6,[24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous fermion and exciton condensations from a model Hamiltonian

Sager

Mazziotti

2022

Phys. Rev. B

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Fermion-exciton condensation in which both fermion-pair (i.e. superconductivity) and exciton condensations occur simultaneously in a single coherent quantum state has recently been conjectured to exist. Here, we capture the fermion-exciton condensation through a model Hamiltonian that can recreate the physics of this new class of highly-correlated condensation phenomena. We demonstrate that the Hamiltonian generates the large-eigenvalue signatures of fermion-pair and exciton condensations for a series of states with increasing particle numbers. The results confirm that the dual-condensate wave function arises from the entanglement of fermion-pair and exciton wave functions, which we previously predicted in the thermodynamic limit. This model Hamiltoniangeneralizing well-known model Hamiltonians for either superconductivity or exciton condensationcan explore a wide variety of condensation behavior. It provides significant insights into the required forces for generating a fermion-exciton condensate, which will likely be invaluable for realizing such condensations in realistic materials with applications from superconductors to excitonic materials.

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