Topological Higgs Amplitude Modes in Strongly Interacting Superfluids
- URL: http://arxiv.org/abs/2107.03998v2
- Date: Thu, 16 Sep 2021 04:58:56 GMT
- Title: Topological Higgs Amplitude Modes in Strongly Interacting Superfluids
- Authors: Junsen Wang, Youjin Deng and Wei Zheng
- Abstract summary: We show the existence of topological Higgs amplitude modes in the strongly interacting superfluid phase.
Using the slave boson approach, we find that, in the large filling limit, the Higgs excitations and the Goldstone excitations above the ground state are well decoupled.
Our discovery of the first realization of the topological Higgs mode opens the path to novel investigations in various systems.
- Score: 2.1532925122722744
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: By studying the 2-dimensional Su-Schrieffer-Heeger-Bose-Hubbard model, we
show the existence of topological Higgs amplitude modes in the strongly
interacting superfluid phase. Using the slave boson approach, we find that, in
the large filling limit, the Higgs excitations and the Goldstone excitations
above the ground state are well decoupled, and both of them exhibit nontrivial
topology inherited from the underlying noninteracting bands. At finite
fillings, they become coupled at high energies; nevertheless, the topology of
these modes are unchanged. Moreover, based on an effective action analysis, we
further provide a universal physical picture for the topological character of
Higgs and Goldstone modes. Our discovery of the first realization of the
topological Higgs mode opens the path to novel investigations in various
systems such as superconductors and quantum magnetism.
Related papers
- Observation of Higgs and Goldstone modes in U(1) symmetry-broken Rydberg atomic systems [23.439762818503013]
We report an experimental signature of Higgs and Goldstone modes in a U(1) symmetry-broken Rydberg atomic gases.
By constructing two probe fields to excite atoms, we observe the distinct phase and amplitude fluctuations of Rydberg atoms collective excitations.
arXiv Detail & Related papers (2024-10-08T13:45:59Z) - Non-Hermitian second-order topological superconductors [0.19999259391104385]
We study the interplay between the non-Hermiticity and the second-order topological superconductors in two spatial dimensions.
We show that the non-Hermiticity drives both the bulk states and topological edge modes to accumulate toward opposite corners of the system.
arXiv Detail & Related papers (2023-11-30T07:54:34Z) - Fragmented superconductivity in the Hubbard model as solitons in
Ginzburg-Landau theory [58.720142291102135]
Superconductivity and charge density waves are observed in close vicinity in strongly correlated materials.
We investigate the nature of such an intertwined state of matter stabilized in the phase diagram of the elementary $t$-$tprime$-$U$ Hubbard model.
We provide conclusive evidence that the macroscopic wave functions of the superconducting fragments are well-described by soliton solutions of a Ginzburg-Landau equation.
arXiv Detail & Related papers (2023-07-21T18:00:07Z) - Higher-order topological Peierls insulator in a two-dimensional
atom-cavity system [58.720142291102135]
We show how photon-mediated interactions give rise to a plaquette-ordered bond pattern in the atomic ground state.
The pattern opens a non-trivial topological gap in 2D, resulting in a higher-order topological phase hosting corner states.
Our work shows how atomic quantum simulators can be harnessed to investigate novel strongly-correlated topological phenomena.
arXiv Detail & Related papers (2023-05-05T10:25:14Z) - Qubit-photon bound states in topological waveguides with long-range
hoppings [62.997667081978825]
Quantum emitters interacting with photonic band-gap materials lead to the appearance of qubit-photon bound states.
We study the features of the qubit-photon bound states when the emitters couple to the bulk modes in the different phases.
We consider the coupling of emitters to the edge modes appearing in the different topological phases.
arXiv Detail & Related papers (2021-05-26T10:57:21Z) - Topology and retardation effect of a giant atom in a topological
waveguide [1.468677167874397]
We study a system that a giant atom is coupled to two points of a one-dimensional topological waveguide formed by the Su-Schrieffer-Heeger chain.
We find that the giant atom can act as an effective boundary and induce the chiral zero energy modes for the waveguide under the periodical boundary.
Our work may promote more studies on the interaction between matter and topological environment.
arXiv Detail & Related papers (2021-03-08T04:30:43Z) - Quantum dynamics in low-dimensional topological systems [0.0]
We study the quantum dynamics that take place in low dimensional topological systems, specifically 1D and 2D lattices.
We find that the topological nature of the bath reflects itself in the photon bound states and the effective dipolar interactions between the emitters.
arXiv Detail & Related papers (2020-08-05T10:58:35Z) - Limit Cycle Phase and Goldstone Mode in Driven Dissipative Systems [0.0]
We investigate the first- and second-order quantum dissipative phase transitions of a three-mode cavity with a Hubbard interaction.
Our theoretical predictions suggest that interacting multimode photonic systems are rich, versatile testbeds for investigating the crossovers between the mean-field picture and quantum phase transitions.
arXiv Detail & Related papers (2020-07-21T09:37:18Z) - Topological photon pairs in a superconducting quantum metamaterial [44.62475518267084]
We use an array of superconducting qubits to engineer a nontrivial quantum metamaterial.
By performing microwave spectroscopy of the fabricated array, we experimentally observe the spectrum of elementary excitations.
We find not only the single-photon topological states but also the bands of exotic bound photon pairs arising due to the inherent anharmonicity of qubits.
arXiv Detail & Related papers (2020-06-23T07:04:27Z) - Dynamical solitons and boson fractionalization in cold-atom topological
insulators [110.83289076967895]
We study the $mathbbZ$ Bose-Hubbard model at incommensurate densities.
We show how defects in the $mathbbZ$ field can appear in the ground state, connecting different sectors.
Using a pumping argument, we show that it survives also for finite interactions.
arXiv Detail & Related papers (2020-03-24T17:31:34Z) - Probing chiral edge dynamics and bulk topology of a synthetic Hall
system [52.77024349608834]
Quantum Hall systems are characterized by the quantization of the Hall conductance -- a bulk property rooted in the topological structure of the underlying quantum states.
Here, we realize a quantum Hall system using ultracold dysprosium atoms, in a two-dimensional geometry formed by one spatial dimension.
We demonstrate that the large number of magnetic sublevels leads to distinct bulk and edge behaviors.
arXiv Detail & Related papers (2020-01-06T16:59:08Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.