Continuous dynamical decoupling of spin chains: Inducing two-qubit interactions to generate perfect entanglement

• URL: http://arxiv.org/abs/2012.03873v3
• Date: Mon, 11 Dec 2023 09:22:08 GMT
• Title: Continuous dynamical decoupling of spin chains: Inducing two-qubit interactions to generate perfect entanglement
• Authors: Abdullah Irfan, Syed Furqan Abbas Hashmi, Syeda Neha Zaidi, Muhammad Usman Baig, Wahaj Ayub, Adam Zaman Chaudhry
• Abstract summary: Control over entanglement in spin chains is useful for quantum information processing applications. We show that the quantum state of any two spins in the spin chain can be made to be a Bell state.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Efficient control over entanglement in spin chains is useful for quantum information processing applications. In this paper, we propose the use of a combination of two different configurations of strong static and oscillating fields to control and generate near-perfect entanglement between any two spins in a spin chain, even in the presence of noise. This is made possible by the fact that our control fields not only decouple the spin chain from its environment but also selectively modify the spin-spin interactions. By suitably tuning these spin-spin interactions via the control fields, we show that the quantum state of any two spins in the spin chain can be made to be a Bell state. We illustrate our results for various spin chains, such as the XY model, the XYZ model, and the Ising spin chain.

Related papers

• Quantum synchronization between two spin chains using pseudo-bosonic equivalence [0.9374652839580183]
  We explore the quantum synchronization of two finite chains of spin-1/2 particles, via a nonlinear interaction mediated by a a central intermediary spin chain. We show that quantum synchronization is robust against variations in the number of spins and inter-spin coupling, though may be affected by thermal noise. This work advances the understanding of synchronization in multi-spin systems and introduces a generalized synchronization measure for both bosons and fermions.
  arXiv  Detail & Related papers  (2024-08-12T13:11:40Z)
• Control of an environmental spin defect beyond the coherence limit of a central spin [79.16635054977068]
  We present a scalable approach to increase the size of electronic-spin registers. We experimentally realize this approach to demonstrate the detection and coherent control of an unknown electronic spin outside the coherence limit of a central NV. Our work paves the way for engineering larger quantum spin registers with the potential to advance nanoscale sensing, enable correlated noise spectroscopy for error correction, and facilitate the realization of spin-chain quantum wires for quantum communication.
  arXiv  Detail & Related papers  (2023-06-29T17:55:16Z)
• Tunable itinerant spin dynamics with polar molecules [2.830197032154302]
  Ising and spin exchange interactions are precisely tuned by varying the strength and orientation of an electric field. Our work establishes an interacting spin platform that allows for exploration of many-body spin dynamics and spin-motion physics.
  arXiv  Detail & Related papers  (2022-08-03T16:57:36Z)
• Probing dynamics of a two-dimensional dipolar spin ensemble using single qubit sensor [62.997667081978825]
  We experimentally investigate individual spin dynamics in a two-dimensional ensemble of electron spins on the surface of a diamond crystal. We show that this anomalously slow relaxation rate is due to the presence of strong dynamical disorder. Our work paves the way towards microscopic study and control of quantum thermalization in strongly interacting disordered spin ensembles.
  arXiv  Detail & Related papers  (2022-07-21T18:00:17Z)
• Programmable N-body interactions with trapped ions [0.0]
  Trapped atomic ion qubits are a powerful quantum platform for quantum computation and simulation. We formulate and analyze a mechanism that extends the standard Molmer-Sorensen pairwise entangling gate. We show that spin-dependent optical forces applied at twice the motional frequency generate a coordinate-transformation of the collective ion motion in phase-space.
  arXiv  Detail & Related papers  (2022-07-21T15:49:52Z)
• Spin-spin coupling-based quantum and classical phase transitions in two-impurity spin-boson models [55.41644538483948]
  Two-interacting-impurity spin-boson models with vanishing transverse fields on the spin-pair are studied. The dynamics of the magnetization is analysed for different levels of (an)isotropy.
  arXiv  Detail & Related papers  (2022-05-19T08:01:03Z)
• Precession of entangled spin and pseudospin in double quantum dots [0.0]
  Quantum dot spin valves are characterized by exchange fields which induce spin precession and generate current spin resonances. We generalize this setup to allow for arbitrary spin and orbital polarization of the leads. We observe for both vectors a delicate interplay of decoherence, pumping and precession which can only be understood by considering the dynamics of the spin-pseudospin correlators.
  arXiv  Detail & Related papers  (2022-02-08T23:00:00Z)
• Understanding the propagation of excitations in quantum spin chains with different kind of interactions [68.8204255655161]
  It is shown that the inhomogeneous chains are able to transfer excitations with near perfect fidelity. It is shown that both designed chains have in common a partially ordered spectrum and well localized eigenvectors.
  arXiv  Detail & Related papers  (2021-12-31T15:09:48Z)
• Transforming spin chains with a continuous driving field [0.0]
  sinusoidal control field is used to suitably transform quantum spin chains. We show how these transformations can be useful for quantum state transfer as well as entanglement generation.
  arXiv  Detail & Related papers  (2021-11-29T16:00:45Z)
• Non-equilibrium non-Markovian steady-states in open quantum many-body systems: Persistent oscillations in Heisenberg quantum spin chains [68.8204255655161]
  We investigate the effect of a non-Markovian, structured reservoir on an open Heisenberg spin chain. We establish a coherent self-feedback mechanism as the reservoir couples frequency-dependent to the spin chain.
  arXiv  Detail & Related papers  (2020-06-05T09:16:28Z)
• Controlled quantum state transfer in $XX$ spin chains at the Quantum Speed Limit [62.997667081978825]
  In homogeneous chains it implies that taking information from one extreme of the chain to the other will take a time $O(N/2)$, where $N$ is the chain length. We design control pulses that achieve near perfect population transfer between the extremes of the chain at times on the order of $N/2$, or larger.
  arXiv  Detail & Related papers  (2020-05-15T23:10:19Z)

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.