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Dynamically generated quadrupole polarization using Floquet adiabatic evolution
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DOI：10.1103/PhysRevResearch.5.023015.png)
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Abstract
En 中文
We investigate the nonequilibrium dynamics of the S = 1 quantum spin chain subjected to a time-dependent external drive, where the driving frequency is adiabatically decreased as a function of time (Floquet adiabatic evolution). We show that, when driving the rhombic anisotropy term (known as the two-axis countertwisting in the context of squeezed spin states) of a Neel antiferromagnet, we can induce an overall enhancement in the quadrupole polarization, while at the same time suppressing the staggered magnetization order. The system evolves into a new state with a net quadrupole moment and antiferroquadrupolar correlations. This state remains stable at long times once the driving frequency is kept constant. On the other hand, we find that we cannot achieve a quadrupole polarization for the symmetry-protected Haldane phase, which remains robust against such driving.
Keywords:
DIMENSIONAL HEISENBERG-ANTIFERROMAGNET
LIGHT-INDUCED SUPERCONDUCTIVITY
HALDANE-GAP
QUANTUM-SPIN
BIQUADRATIC EXCHANGE
MAGNETIC-PROPERTIES
NEUTRON-SCATTERING
CHAINS
TRANSITION
SYMMETRY
Journal
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4.2
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7.6K
Citations:
2.7W