Generation of entanglement between quantum dot molecule with the
presence of phonon effects in a voltage-controlled junction
- URL: http://arxiv.org/abs/2106.05614v1
- Date: Thu, 10 Jun 2021 09:37:08 GMT
- Title: Generation of entanglement between quantum dot molecule with the
presence of phonon effects in a voltage-controlled junction
- Authors: Elaheh Afsaneh and Malek Bagheri Harouni
- Abstract summary: We investigate the generation of entanglement through a quantum dot molecule under the influence of vibrational phonon modes.
The molecular quantum dot system is realized by coupled quantum dots inside a suspended carbon nanotube.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We investigate the generation of entanglement through a quantum dot molecule
under the influence of vibrational phonon modes in a bias voltage junction. The
molecular quantum dot system is realized by coupled quantum dots inside a
suspended carbon nanotube. We consider the dynamical entanglement as a function
of bias voltage and temperature by taking into account the electron-phonon
interaction. In order to generate the robust entanglement between quantum dots
and preserve it to reach the maximal achievable amount steadily, we introduce
an asymmetric coupling protocol and apply the easy tunable bias voltage-driven
field. For an oscillating bias voltage, the time-varying entanglement can
periodically reach the maximum revival. In thermal entanglement dynamics, the
phenomena of thermal entanglement degradation and thermal entanglement revival
are observed which are intensively affected by the strength of phonon
decoherence. The revival of entanglement shows a larger value for a higher
phonon coupling.
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) - Dynamical Spectral Response of Fractonic Quantum Matter [0.0]
We study the low-energy excitations of a constrained Bose-Hubbard model in one dimension.
We show the existence of gapped excitations compatible with strong coupling results.
arXiv Detail & Related papers (2023-10-24T18:00:01Z) - Observing dynamical phases of BCS superconductors in a cavity QED
simulator [0.0]
In conventional superconductors, electrons with opposite momenta bind into Cooper pairs due to an attractive interaction mediated by phonons in the material.
Superconductivity naturally emerges at thermal equilibrium, but can also emerge out of equilibrium when the system's parameters are abruptly changed.
Here we realize an alternate way to generate the proposed dynamical phases using cavity quantum electrodynamics.
arXiv Detail & Related papers (2023-05-31T18:00:03Z) - Quantum interaction of sub-relativistic aloof electrons with mesoscopic
samples [91.3755431537592]
Relativistic electrons experience very slight wave packet distortion and negligible momentum recoil when interacting with nanometer-sized samples.
Modelling fast electrons as classical point-charges provides extremely accurate theoretical predictions of energy-loss spectra.
arXiv Detail & Related papers (2022-11-14T15:22:37Z) - Quantum thermodynamics of periodically driven polaritonic systems [0.0]
We investigate the energy distribution and quantum thermodynamics in periodically driven polaritonic systems at room temperature.
We compute the thermodynamic performance during harmonic modulation and demonstrate that maximum efficiency occurs at resonance.
arXiv Detail & Related papers (2022-07-03T04:32:11Z) - Tuning long-range fermion-mediated interactions in cold-atom quantum
simulators [68.8204255655161]
Engineering long-range interactions in cold-atom quantum simulators can lead to exotic quantum many-body behavior.
Here, we propose several tuning knobs, accessible in current experimental platforms, that allow to further control the range and shape of the mediated interactions.
arXiv Detail & Related papers (2022-03-31T13:32:12Z) - Controlled coherent dynamics of [VO(TPP)], a prototype molecular nuclear
qudit with an electronic ancilla [50.002949299918136]
We show that [VO(TPP)] (vanadyl tetraphenylporphyrinate) is a promising system suitable to implement quantum computation algorithms.
It embeds an electronic spin 1/2 coupled through hyperfine interaction to a nuclear spin 7/2, both characterized by remarkable coherence.
arXiv Detail & Related papers (2021-03-15T21:38:41Z) - Evolution of a Non-Hermitian Quantum Single-Molecule Junction at
Constant Temperature [62.997667081978825]
We present a theory for describing non-Hermitian quantum systems embedded in constant-temperature environments.
We find that the combined action of probability losses and thermal fluctuations assists quantum transport through the molecular junction.
arXiv Detail & Related papers (2021-01-21T14:33:34Z) - 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) - Probing eigenstate thermalization in quantum simulators via
fluctuation-dissipation relations [77.34726150561087]
The eigenstate thermalization hypothesis (ETH) offers a universal mechanism for the approach to equilibrium of closed quantum many-body systems.
Here, we propose a theory-independent route to probe the full ETH in quantum simulators by observing the emergence of fluctuation-dissipation relations.
Our work presents a theory-independent way to characterize thermalization in quantum simulators and paves the way to quantum simulate condensed matter pump-probe experiments.
arXiv Detail & Related papers (2020-07-20T18:00:02Z) - Molecule-photon interactions in phononic environments [0.0879626117219674]
Liquid quantum optical systems can interface photons, electronic degrees of freedom, localized mechanical vibrations and phonons.
In particular, the strong vibronic interaction between electrons and nuclear motion in a molecule resembles the optomechanical radiation pressure Hamiltonian.
We take here an open quantum system approach to the non-equilibrium dynamics of molecules embedded in a crystal.
arXiv Detail & Related papers (2019-12-05T15:11:46Z)
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.