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Realizing nontrivial doublon formation using a quantum computer
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DOI：10.1103/PhysRevB.110.L020302.png)
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Dynamical formation of doublons or on-site repulsively bound pairs of particles on a lattice is a highly nontrivial phenomenon. In this work, we show the signatures of doublon formation in a quantum computer by simulating the continuous time quantum walk in the framework of the one-dimensional extended Fermi-Hubbard model. By considering two up-component and one down-component particles initially created at the three neighboring sites at the middle of the lattice and allowing intra- (inter-)component nearest-neighbor (on-site) interactions, we show the formation of a stable on-site doublon in the quantum walk. The probability of such doublon formation is more (less) if the hopping strength of the down particle is weaker (stronger) compared to the up particle. On the contrary, for an initial doublon along with a free up particle, the stability of the doublon is more prominent than the doublon dissociation in the dynamics irrespective of the hopping asymmetry between the two components. We first numerically obtain the signatures of the stable doublon formation in the dynamics and then observe them using noisy intermediate-scale quantum (NISQ) devices.
Keyword:
ERROR MITIGATION
WALKS
DYNAMICS
期刊
IF:
3.7
论文数:
15.4W
被引数:
41.0W
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