Floquet-engineered Emergent Massive Nambu-Goldstone Modes
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866909707134828544 |
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| author | Hou, Yang Fu, Zhanpeng Moessner, Roderich Bukov, Marin Zhao, Hongzheng |
| author_facet | Hou, Yang Fu, Zhanpeng Moessner, Roderich Bukov, Marin Zhao, Hongzheng |
| contents | We present a general framework to implement massive Nambu-Goldstone quasi-particles in driven many-body systems. The underlying mechanism leverages an explicit Lie group structure imprinted into an effective Hamiltonian that governs the dynamics of slow degrees of freedom; the resulting emergent continuous symmetry is weakly explicitly broken, giving rise to a massive Nambu-Goldstone mode, with a spectral mass gap scaling linearly with the drive period. We discuss explicit and experimentally implementable realizations, such as Heisenberg-like spin models that support gapped spin-wave excitations. We provide a protocol to certify the existence of the massive Nambu-Goldstone mode from the dynamics of specific observables, and analyse the dispersion spectrum and their lifetime in the presence of weak explicit symmetry breaking. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_01902 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Floquet-engineered Emergent Massive Nambu-Goldstone Modes Hou, Yang Fu, Zhanpeng Moessner, Roderich Bukov, Marin Zhao, Hongzheng Quantum Physics Quantum Gases Statistical Mechanics We present a general framework to implement massive Nambu-Goldstone quasi-particles in driven many-body systems. The underlying mechanism leverages an explicit Lie group structure imprinted into an effective Hamiltonian that governs the dynamics of slow degrees of freedom; the resulting emergent continuous symmetry is weakly explicitly broken, giving rise to a massive Nambu-Goldstone mode, with a spectral mass gap scaling linearly with the drive period. We discuss explicit and experimentally implementable realizations, such as Heisenberg-like spin models that support gapped spin-wave excitations. We provide a protocol to certify the existence of the massive Nambu-Goldstone mode from the dynamics of specific observables, and analyse the dispersion spectrum and their lifetime in the presence of weak explicit symmetry breaking. |
| title | Floquet-engineered Emergent Massive Nambu-Goldstone Modes |
| topic | Quantum Physics Quantum Gases Statistical Mechanics |
| url | https://arxiv.org/abs/2409.01902 |