Self-oscillating pump in a topological dissipative atom-cavity system
- URL: http://arxiv.org/abs/2112.11502v2
- Date: Thu, 15 Dec 2022 11:18:15 GMT
- Title: Self-oscillating pump in a topological dissipative atom-cavity system
- Authors: Davide Dreon, Alexander Baumg\"artner, Xiangliang Li, Simon Hertlein,
Tilman Esslinger, Tobias Donner
- Abstract summary: We report on an emergent mechanism for pumping in a quantum gas coupled to an optical resonator.
Due to dissipation, the cavity field evolves between its two quadratures, each corresponding to a different centrosymmetric crystal configuration.
This self-oscillation results in a time-periodic potential analogous to that describing the transport of electrons in topological tight-binding models.
- Score: 55.41644538483948
- License: http://creativecommons.org/licenses/by-nc-nd/4.0/
- Abstract: Pumps are transport mechanisms in which direct currents result from a cyclic
evolution of the potential. As Thouless has shown, the pumping process can have
topological origins, when considering the motion of quantum particles in
spatially and temporally periodic potentials. However, the periodic evolution
that drives these pumps has always been assumed to be imparted from outside, as
was the case in the experimental systems studied so far. Here we report on an
emergent mechanism for pumping in a quantum gas coupled to an optical
resonator, where we observe a particle current without applying a periodic
drive. The pumping potential experienced by the atoms is formed by the
self-consistent cavity field interfering with the static laser field driving
the atoms. Due to dissipation, the cavity field evolves between its two
quadratures, each corresponding to a different centrosymmetric crystal
configuration. This self-oscillation results in a time-periodic potential
analogous to that describing the transport of electrons in topological
tight-binding models, like the paradigmatic Rice-Mele pump. In the experiment,
we directly follow the evolution by measuring the phase winding of the cavity
field with respect to the driving field and observing the atomic motion
in-situ. The discovered mechanism combines the dynamics of topological and open
systems, and features characteristics of continuous dissipative time crystals.
Related papers
- Self-interaction induced phase modulation for directed current, energy diffusion and quantum scrambling in a Floquet ratchet system [0.0]
We investigate the dynamics of directed current, mean energy, and quantum scrambling in an interacting Floquet system with a ratchet potential.
The directed current is controlled by the phase of the ratchet potential and remains independent of the self-interaction strength.
The phase modulation induced by self-interaction dominates the quadratic growth of both mean energy and Out-of-Time-Ordered Correlators (OTOCs)
arXiv Detail & Related papers (2024-11-01T22:17:24Z) - Stabilization of Hubbard-Thouless pumps through nonlocal fermionic
repulsion [0.0]
Thouless pumping represents a powerful concept to probe quantized topological invariants in quantum systems.
We show that sufficiently large intersite interactions allow for an interaction-induced recovery of Thouless pumps.
Our results provide a new mechanism to stabilize Thouless pumps in interacting quantum systems.
arXiv Detail & Related papers (2023-08-25T13:34:42Z) - Spontaneous Symmetry Breaking and Time-Crystal States in Chiral Atomic
Systems [0.0]
We present a theoretical study of the interaction between an atom characterized by a degenerate ground state and a reciprocal environment.
Our findings introduce a novel mechanism for the spontaneous breaking of time-reversal symmetry in atomic systems.
arXiv Detail & Related papers (2023-08-18T13:44:07Z) - Quantized Nonlinear Thouless Pumping [0.0]
We show that nonlinearity acts to quantize transport via soliton formation and spontaneous symmetry breaking bifurcations.
Our result shows that nonlinearity and interparticle interactions can induce quantized transport and topological behavior even where the linear limit does not.
arXiv Detail & Related papers (2021-06-27T03:02:39Z) - Visualizing spinon Fermi surfaces with time-dependent spectroscopy [62.997667081978825]
We propose applying time-dependent photo-emission spectroscopy, an established tool in solid state systems, in cold atom quantum simulators.
We show in exact diagonalization simulations of the one-dimensional $t-J$ model that the spinons start to populate previously unoccupied states in an effective band structure.
The dependence of the spectral function on the time after the pump pulse reveals collective interactions among spinons.
arXiv Detail & Related papers (2021-05-27T18:00:02Z) - Bloch-Landau-Zener dynamics induced by a synthetic field in a photonic
quantum walk [52.77024349608834]
We realize a photonic quantum walk in the presence of a synthetic gauge field.
We investigate intriguing system dynamics characterized by the interplay between Bloch oscillations and Landau-Zener transitions.
arXiv Detail & Related papers (2020-11-11T16:35:41Z) - Collective spontaneous emission of two entangled atoms near an
oscillating mirror [50.591267188664666]
We consider the cooperative spontaneous emission of a system of two identical atoms, interacting with the electromagnetic field in the vacuum state.
Using time-dependent theory, we investigate the spectrum of the radiation emitted by the two-atom system.
We show that it is modulated in time, and that the presence of the oscillating mirror can enhance or inhibit the decay rate.
arXiv Detail & Related papers (2020-10-07T06:48:20Z) - Analog cosmological reheating in an ultracold Bose gas [58.720142291102135]
We quantum-simulate the reheating-like dynamics of a generic cosmological single-field model in an ultracold Bose gas.
Expanding spacetime as well as the background oscillating inflaton field are mimicked in the non-relativistic limit.
The proposed experiment has the potential of exploring the evolution up to late times even beyond the weak coupling regime.
arXiv Detail & Related papers (2020-08-05T18:00:26Z) - Zitterbewegung and Klein-tunneling phenomena for transient quantum waves [77.34726150561087]
We show that the Zitterbewegung effect manifests itself as a series of quantum beats of the particle density in the long-time limit.
We also find a time-domain where the particle density of the point source is governed by the propagation of a main wavefront.
The relative positions of these wavefronts are used to investigate the time-delay of quantum waves in the Klein-tunneling regime.
arXiv Detail & Related papers (2020-03-09T21:27:02Z) - Driving Quantum Correlated Atom-Pairs from a Bose-Einstein Condensate [0.0]
We investigate one such control protocol that demonstrates the resonant amplification of quasimomentum pairs from a Bose-Einstein condensate.
A classical external field that excites pairs of particles with the same energy but opposite momenta is reminiscent of the coherently-driven nonlinearity in a parametric amplifier crystal.
arXiv Detail & Related papers (2020-01-08T00:11:26Z)
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.