Dimerization of many-body subradiant states in waveguide quantum
electrodynamics
- URL: http://arxiv.org/abs/2106.09423v1
- Date: Thu, 17 Jun 2021 12:17:04 GMT
- Title: Dimerization of many-body subradiant states in waveguide quantum
electrodynamics
- Authors: Alexander V. Poshakinskiy and Alexander N. Poddubny
- Abstract summary: We study theoretically subradiant states in the array of atoms coupled to photons propagating in a one-dimensional waveguide.
We introduce a generalized many-body entropy of entanglement based on exact numerical diagonalization.
We reveal the breakdown of fermionized subradiant states with increase of $f$ with emergence of short-ranged dimerized antiferromagnetic correlations.
- Score: 137.6408511310322
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We study theoretically subradiant states in the array of atoms coupled to
photons propagating in a one-dimensional waveguide focusing on the strongly
interacting many-body regime with large excitation fill factor $f$. We
introduce a generalized many-body entropy of entanglement based on exact
numerical diagonalization followed by a high-order singular value
decomposition. This approach has allowed us to visualize and understand the
structure of a many-body quantum state. We reveal the breakdown of fermionized
subradiant states with increase of $f$ with emergence of short-ranged dimerized
antiferromagnetic correlations at the critical point $f=1/2$ and the complete
disappearance of subradiant states at $f>1/2$.
Related papers
- Multimer states in multilevel waveguide QED [49.1574468325115]
We study theoretically the interplay of spontaneous emission and interactions for quasistationary eigenstates in a finite periodic array of multilevel atoms coupled to the waveguide.
Our calculations reveal the peculiar multimerization effect driven by the anharmonicity of the atomic potential.
arXiv Detail & Related papers (2024-06-18T08:27:41Z) - Non-Markovian dynamics with a giant atom coupled to a semi-infinite photonic waveguide [0.0]
We study the non-Markovian dynamics of a two-level giant atom interacting with a one-dimensional semi-infinite waveguide.
We find that three different types of bound states can be formed in the system.
We extend the system to a more general case involving many giant atoms coupled into a one-dimensional semi-infinite waveguide.
arXiv Detail & Related papers (2024-04-11T16:24:01Z) - Strongly subradiant states in planar atomic arrays [39.58317527488534]
We study collective dipolar oscillations in finite planar arrays of quantum emitters in free space.
We show that the external coupling between the collective states associated with the symmetry of the array and with the quasi-flat dispersion of the corresponding infinite lattice plays a crucial role in the boost of their radiative lifetime.
arXiv Detail & Related papers (2023-10-10T17:06:19Z) - Dynamic population of multiexcitation subradiant states in incoherently
excited atomic arrays [0.0]
We show that a maximal coupling to long-lived subradiant states is achieved if only half of the atoms are initially excited.
In particular, we show that a maximal coupling to long-lived subradiant states is achieved if only half of the atoms are initially excited.
arXiv Detail & Related papers (2022-08-31T18:00:47Z) - Driven anti-Bragg subradiant states in waveguide quantum electrodynamics [91.3755431537592]
We study theoretically driven quantum dynamics in periodic arrays of two-level qubits coupled to the waveguide.
We demonstrate, that strongly subradiant eigenstates of the master equation for the density matrix emerge under strong coherent driving for arrays with the anti-Bragg periods.
arXiv Detail & Related papers (2022-02-21T11:36:55Z) - Free-Fermion Multiply Excited Eigenstates and Their Experimental
Signatures in 1D Arrays of Two-Level Atoms [8.527960992762184]
We show that free-fermion states generally appear whenever the band of singly excited states has a quadratic dispersion relation at the band edge.
We propose different means for their preparation and analyze their experimental signature in optical detection.
arXiv Detail & Related papers (2021-09-09T20:04:34Z) - Quantum chaos driven by long-range waveguide-mediated interactions [125.99533416395765]
We study theoretically quantum states of a pair of photons interacting with a finite periodic array of two-level atoms in a waveguide.
Our calculation reveals two-polariton eigenstates that have a highly irregular wave-function in real space.
arXiv Detail & Related papers (2020-11-24T07:06:36Z) - Subradiant emission from regular atomic arrays: universal scaling of
decay rates from the generalized Bloch theorem [8.527960992762184]
We show that a dispersion relation leads to the existence of subradiant states of finite one-dimensional arrays of $N$ atoms with decay rates scaling as $N-(s+1)$.
This explains the recently discovered $N-3$ scaling and it leads to the prediction of power law scaling with higher power for special values of the lattice period.
arXiv Detail & Related papers (2020-06-11T11:06:18Z) - Maximum refractive index of an atomic medium [58.720142291102135]
All optical materials with a positive refractive index have a value of index that is of order unity.
Despite the giant response of an isolated atom, we find that the maximum index does not indefinitely grow with increasing density.
We propose an explanation based upon strong-disorder renormalization group theory.
arXiv Detail & Related papers (2020-06-02T14:57:36Z) - Anisotropy-mediated reentrant localization [62.997667081978825]
We consider a 2d dipolar system, $d=2$, with the generalized dipole-dipole interaction $sim r-a$, and the power $a$ controlled experimentally in trapped-ion or Rydberg-atom systems.
We show that the spatially homogeneous tilt $beta$ of the dipoles giving rise to the anisotropic dipole exchange leads to the non-trivial reentrant localization beyond the locator expansion.
arXiv Detail & Related papers (2020-01-31T19:00:01Z)
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.