Multilevel Laser Induced Continuum Structure

• URL: http://arxiv.org/abs/2101.02603v2
• Date: Wed, 3 Feb 2021 09:24:12 GMT
• Title: Multilevel Laser Induced Continuum Structure
• Authors: K. N. Zlatanov and N. V. Vitanov
• Abstract summary: We discuss the simplest non-trivial multilevel generalization of LICS coupling two bound levels. We reduce the complexity of the effective system of bound states by switching to a rotated basis. We derive a trapping condition and explore the dynamics of the sub-systems under different initial conditions.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Laser-induced-continuum-structure(LICS) allows for coherent control techniques to be applied in a Raman type system with intermediate continuum state. To this end the standard LICS problem treats two bound states coupled to one or more continua states. In this paper we discuss the simplest non-trivial multilevel generalization of LICS coupling two bound levels, each composed of two degenerate states through a common continuum state. We reduce the complexity of the effective system of bound states by switching to a rotated basis in which different sub-systems of lower dimension evolve independently. We derive a trapping condition and explore the dynamics of the sub-systems under different initial conditions.

Related papers

• Two-mode Open Quantum Systems: Decoherence and Localized Bound State Dynamics [1.3281936946796913]
  Dissipationless localized bound states of open quantum systems are robust to decoherence. This may provide a new avenue to develop dissipationless quantum technology for quantum operations.
  arXiv  Detail & Related papers  (2024-10-28T08:51:14Z)
• Efficiency of Dynamical Decoupling for (Almost) Any Spin-Boson Model [44.99833362998488]
  We analytically study the dynamical decoupling of a two-level system coupled with a structured bosonic environment. We find sufficient conditions under which dynamical decoupling works for such systems. Our bounds reproduce the correct scaling in various relevant system parameters.
  arXiv  Detail & Related papers  (2024-09-24T04:58:28Z)
• Diverse Entanglement Mechanisms in Multimode Nonlinear Continuous Variables [0.5181355744034635]
  Non-Gaussian entangled states play a crucial role in harnessing quantum advantage in quantum information. How to fully characterize N-partite (N > 3) non-Gaussian entanglement without quantum state tomography remains elusive. Here, we propose several necessary and sufficient conditions for the positive-partial-transposition separability of multimode nonlinear quantum states.
  arXiv  Detail & Related papers  (2023-12-04T00:20:43Z)
• Multipartite entanglement theory with entanglement-nonincreasing operations [91.3755431537592]
  We extend the resource theory of entanglement for multipartite systems beyond the standard framework of local operations and classical communication. We demonstrate that in this adjusted framework, the transformation rates between multipartite states are fundamentally dictated by the bipartite entanglement entropies of the respective quantum states.
  arXiv  Detail & Related papers  (2023-05-30T12:53:56Z)
• Two convergent NPA-like hierarchies for the quantum bilocal scenario [2.048226951354646]
  Characterising correlations that arise from locally measuring a single part of a joint quantum system is one of the main problems of quantum information theory. We introduce a new hierarchy to prove its equivalence to the Scalar Extension and explore its relations with the known generalisations.
  arXiv  Detail & Related papers  (2022-10-17T13:04:41Z)
• Anatomy of Dynamical Quantum Phase Transitions [0.0]
  We study periodic dynamical quantum phase transitions (DQPTs) directly connected to the zeros of a Landau order parameter (OP) We find that a DQPT signals a change in the dominant contribution to the wave function in the degenerate initial-state manifold. Our work generalizes previous results and reveals that, in general, periodic DQPTs comprise complex many-body dynamics fundamentally beyond that of two-level systems.
  arXiv  Detail & Related papers  (2022-10-05T18:00:00Z)
• Growth of entanglement of generic states under dual-unitary dynamics [77.34726150561087]
  Dual-unitary circuits are a class of locally-interacting quantum many-body systems. In particular, they admit a class of solvable" initial states for which, in the thermodynamic limit, one can access the full non-equilibrium dynamics. We show that in this case the entanglement increment during a time step is sub-maximal for finite times, however, it approaches the maximal value in the infinite-time limit.
  arXiv  Detail & Related papers  (2022-07-29T18:20:09Z)
• On optimization of coherent and incoherent controls for two-level quantum systems [77.34726150561087]
  This article considers some control problems for closed and open two-level quantum systems. The closed system's dynamics is governed by the Schr"odinger equation with coherent control. The open system's dynamics is governed by the Gorini-Kossakowski-Sudarshan-Lindblad master equation.
  arXiv  Detail & Related papers  (2022-05-05T09:08:03Z)
• Numerical estimation of reachable and controllability sets for a two-level open quantum system driven by coherent and incoherent controls [77.34726150561087]
  The article considers a two-level open quantum system governed by the Gorini--Kossakowski--Lindblad--Sudarshan master equation. The system is analyzed using Bloch parametrization of the system's density matrix.
  arXiv  Detail & Related papers  (2021-06-18T14:23:29Z)
• Continuous and time-discrete non-Markovian system-reservoir interactions: Dissipative coherent quantum feedback in Liouville space [62.997667081978825]
  We investigate a quantum system simultaneously exposed to two structured reservoirs. We employ a numerically exact quasi-2D tensor network combining both diagonal and off-diagonal system-reservoir interactions with a twofold memory for continuous and discrete retardation effects. As a possible example, we study the non-Markovian interplay between discrete photonic feedback and structured acoustic phononovian modes, resulting in emerging inter-reservoir correlations and long-living population trapping within an initially-excited two-level system.
  arXiv  Detail & Related papers  (2020-11-10T12:38:35Z)
• Morris-Shore transformation for non-degenerate systems [0.0]
  The Morris-Shore (MS) transformation is a powerful tool for decomposition of multistate quantum systems. The degeneracy of the states in each set limits the application of the MS transformation in various physically interesting situations. We develop an alternative way for the derivation of Morris-Shore transformation, which can be applied to non-degenerate sets of states.
  arXiv  Detail & Related papers  (2020-09-23T14:49:25Z)

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.