Electronic control and switching of entangled spin state using anisotropy and exchange in the three-particle paradigm

• URL: http://arxiv.org/abs/2112.05223v2
• Date: Fri, 15 Jul 2022 13:08:14 GMT
• Title: Electronic control and switching of entangled spin state using anisotropy and exchange in the three-particle paradigm
• Authors: Eric D. Switzer, Xiao-Guang Zhang, Talat S. Rahman
• Abstract summary: We explore the control and switching of the entangled spin states of multi-spin particle qubit coupled to an electron. We find that while the onsite magnetic anisotropy in the case of $S_2,3>tfrac12$ allows full control of their spin states via interaction with $S_2,3=tfrac12$, additional mechanisms, such as anisotropic exchange coupling, are required.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We explore the control and switching of the entangled spin states of multi-spin particle qubit coupled to an electron using a three-particle spin model described by $S_i$ ($i=1,2,3$), in which $S_1=\tfrac{1}{2}$ is an electron and $S_{2,3}$ can have any spin with both exchange coupling and magnetic anisotropy. We derive a general formula for the existence of a switching (DJ) resonance for any spin $S_{2,3}$. We further contrast the entanglement switching mechanisms for the $S_{2,3}=\tfrac{1}{2}$ and $S_{2,3}=1$ spin models. We find that while the onsite magnetic anisotropy in the case of $S_{2,3}>\tfrac{1}{2}$ allows full control of their spin states via interaction with $S_1$, in order to achieve acceptable control of a Bloch vector within the $S_{2,3}=\tfrac{1}{2}$ model, additional mechanisms, such as anisotropic exchange coupling, are required.

Related papers

• Dynamics of Non-Gaussian Entanglement of Two Magnetically Coupled Modes [0.0]
  This paper surveys the quantum entanglement of two coupled harmonic oscillators via angular momentum. We study the effect of the anisotropy $ R=omega_12/omega_22 $, $omega_c$, asymmetry $ |n-m| $ and dynamics on the entanglement.
  arXiv  Detail & Related papers  (2021-08-09T15:52:34Z)
• Anisotropy-Exchange Resonance as a Mechanism for Entangled State Switching [0.0]
  We find that in the case of $S_2,3=1$ particles, the coupled particle entanglement states can be prepared, controlled, and read by the $S_1$ particle. We also find that for particular resonance conditions of the magnetic anisotropy strength $D$ and exchange coupling strength $J$, the entanglement state switching behavior is maximized and is robust against a range of anisotropic application of the exchange coupling.
  arXiv  Detail & Related papers  (2021-05-03T18:54:52Z)
• Partitioning dysprosium's electronic spin to reveal entanglement in non-classical states [55.41644538483948]
  We report on an experimental study of entanglement in dysprosium's electronic spin. Our findings open up the possibility to engineer novel types of entangled atomic ensembles.
  arXiv  Detail & Related papers  (2021-04-29T15:02:22Z)
• Interacting holes in Si and Ge double quantum dots: from a multiband approach to an effective-spin picture [0.0]
  We investigate two-hole states in prototypical coupled Si and Ge quantum dots via different theoretical approaches. We find that, in the weak interdot regime, the ground state and first excited multiplet of the two-hole system display -- unlike their electronic counterparts -- a high degree of $J$-mixing. The light-hole component additionally induces $M$-mixing and a weak coupling between spinors characterized by different permutational symmetries.
  arXiv  Detail & Related papers  (2021-04-15T19:18:50Z)
• Simulating non-Hermitian dynamics of a multi-spin quantum system and an emergent central spin model [0.0]
  It is possible to simulate the dynamics of a single spin-$1/2$ ($mathsfPT$ symmetric) system by embedding it into a subspace of a larger Hilbert space with unitary dynamics. We visualize it as a strongly correlated central spin model with the additional spin-$1/2$ playing the role of central spin.
  arXiv  Detail & Related papers  (2020-12-24T19:00:11Z)
• Electrically tuned hyperfine spectrum in neutral Tb(II)(Cp$^{\rm{iPr5}}$)$_2$ single-molecule magnet [64.10537606150362]
  Both molecular electronic and nuclear spin levels can be used as qubits. In solid state systems with dopants, an electric field was shown to effectively change the spacing between the nuclear spin qubit levels. This hyperfine Stark effect may be useful for applications of molecular nuclear spins for quantum computing.
  arXiv  Detail & Related papers  (2020-07-31T01:48:57Z)
• Conditional quantum operation of two exchange-coupled single-donor spin qubits in a MOS-compatible silicon device [48.7576911714538]
  Silicon nanoelectronic devices can host single-qubit quantum logic operations with fidelity better than 99.9%. For the spins of an electron bound to a single donor atom, introduced in the silicon by ion implantation, the quantum information can be stored for nearly 1 second. Here we demonstrate the conditional, coherent control of an electron spin qubit in an exchange-coupled pair of $31$P donors implanted in silicon.
  arXiv  Detail & Related papers  (2020-06-08T11:25:16Z)
• Generating ${\rm N00N}$-states of surface plasmon-polariton pairs with a nanoparticle [58.720142291102135]
  We consider a generation of two-particle quantum states in the process of spontaneous parametric down-conversion of light. We show that for certain excitation geometries, $rm N00N$-states of surface plasmon-polariton pairs could be obtained.
  arXiv  Detail & Related papers  (2020-02-12T22:59:38Z)
• Hyperfine and quadrupole interactions for Dy isotopes in DyPc$_2$ molecules [77.57930329012771]
  Nuclear spin levels play an important role in understanding magnetization dynamics and implementation and control of quantum bits in lanthanide-based single-molecule magnets. We investigate the hyperfine and nuclear quadrupole interactions for $161$Dy and $163$Dy nucleus in anionic DyPc$.
  arXiv  Detail & Related papers  (2020-02-12T18:25:31Z)
• 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)
• Quantum phases of collective SU(3) spin systems with bipartite symmetry [0.0]
  We study a bipartite collective spin-$1$ model with exchange interaction between the spins. One of the five phases features a strong bipartite symmetry breaking, meaning that the two subsystems in the ground states are in different $mathrmSU(3)$ representations.
  arXiv  Detail & Related papers  (2020-01-22T23:49:23Z)

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.