Dynamical pairwise entanglement and two-point correlations in the three-ligand spin-star structure

• URL: http://arxiv.org/abs/2006.02738v1
• Date: Thu, 4 Jun 2020 09:53:40 GMT
• Title: Dynamical pairwise entanglement and two-point correlations in the three-ligand spin-star structure
• Authors: Mostafa Motamedifar
• Abstract summary: We consider the three-ligand spin-star structure through homogeneous Heisenberg interactions (XXX-3LSSS) It is shown that the time evolution of the central qubit "one-particle" state results in the generation of quantum W states at periodical time instants.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We consider the three-ligand spin-star structure through homogeneous Heisenberg interactions (XXX-3LSSS) in the framework of dynamical pairwise entanglement. It is shown that the time evolution of the central qubit "one-particle" state (COPS) results in the generation of quantum W states at periodical time instants. On the contrary, W states cannot be generated from the time evolution of a ligand "one-particle" state (LOPS). We also investigate the dynamical behavior of two-point quantum correlations as well as the expectation values of the different spin-components for each element in the XXX-3LSSS. It is found that when a W state is generated, the same value of concurrence among all qubits arises from xx and yy two-point quantum correlations. On the opposite, zz quantum correlation between any two qubits vanishes at these time instants.

Related papers

• Entanglement statistics of randomly interacting spins [62.997667081978825]
  Entanglement depends on the underlying topology of the interaction among the qubits. We investigate the entanglement in the ground state of systems comprising two and three qubits with random interactions.
  arXiv  Detail & Related papers  (2023-07-18T23:58:32Z)
• Observing super-quantum correlations across the exceptional point in a single, two-level trapped ion [48.7576911714538]
  In two-level quantum systems - qubits - unitary dynamics theoretically limit these quantum correlations to $2qrt2$ or 1.5 respectively. Here, using a dissipative, trapped $40$Ca$+$ ion governed by a two-level, non-Hermitian Hamiltonian, we observe correlation values up to 1.703(4) for the Leggett-Garg parameter $K_3$. These excesses occur across the exceptional point of the parity-time symmetric Hamiltonian responsible for the qubit's non-unitary, coherent dynamics.
  arXiv  Detail & Related papers  (2023-04-24T19:44:41Z)
• Entanglement Generation and Decoherence in a Two-Qubit System Mediated by Relativistic Quantum Field [0.0]
  We study a toy model of a quantum entanglement generation between two spins (qubits) mediated by a relativistic free scalar field. Because of the associated particle creation into an open system, the quantum state of spins is partially decohered. We calculate various quantities such as spin correlations, entanglement entropies, mutual information and negativity, and study their behaviors in various limiting situations.
  arXiv  Detail & Related papers  (2022-11-17T10:05:02Z)
• Formation of robust bound states of interacting microwave photons [148.37607455646454]
  One of the hallmarks of interacting systems is the formation of multi-particle bound states. We develop a high fidelity parameterizable fSim gate that implements the periodic quantum circuit of the spin-1/2 XXZ model. By placing microwave photons in adjacent qubit sites, we study the propagation of these excitations and observe their bound nature for up to 5 photons.
  arXiv  Detail & Related papers  (2022-06-10T17:52:29Z)
• Quantum correlations and speed limit of central spin system [0.0]
  We consider single, and two-qubit central spin systems interacting with spin baths and discuss their dynamical properties. The impact of the size of the spin bath on the quantum speed limit for a single qubit central spin model is analyzed.
  arXiv  Detail & Related papers  (2022-05-26T07:16:25Z)
• Correlated steady states and Raman lasing in continuously pumped and probed atomic ensembles [68.8204255655161]
  We consider an ensemble of Alkali atoms that are continuously optically pumped and probed. Due to the collective scattering of photons at large optical depth, the steady state of atoms does not correspond to an uncorrelated tensor-product state. We find and characterize regimes of Raman lasing, akin to the model of a superradiant laser.
  arXiv  Detail & Related papers  (2022-05-10T06:54:54Z)
• Quantum Correlation Dynamics of Three Qubits in Non-Markovian Environments [0.0]
  We investigate the quantum correlation dynamics of three independent qubits each interacting with a zero temperature non-Markovian reservoir. It is found that the quantum correlation of such three qubits system revives after instantaneous disappearance period when a proper amount of non-Markovian is present.
  arXiv  Detail & Related papers  (2021-11-14T19:13:54Z)
• Quantum phase transition in the one-dimensional Dicke-Hubbard model with coupled qubits [20.002319486166016]
  We study the ground state phase diagram of a one-dimensional two qubits Dicke-Hubbard model with XY qubit-qubit interaction.
  arXiv  Detail & Related papers  (2021-11-05T13:17:49Z)
• Dynamic generation of GHZ states with coupled charge qubits [0.0]
  We present a proof-of-principle of the formation of maximally entangled states from the Greenberger-Horne-Zeilinger class. The interplay between coherent tunneling events and many-body interaction gives rise to the formation of highly entangled states.
  arXiv  Detail & Related papers  (2020-09-09T21:01:37Z)
• Synchronisation phase as an indicator of persistent quantum correlations between subsystems [68.8204255655161]
  Spontaneous synchronisation is a collective phenomenon that can occur in both dynamical classical and quantum systems. We show that our analysis applies to a variety of spontaneously synchronising open quantum systems.
  arXiv  Detail & Related papers  (2020-06-29T17:21:32Z)
• Exact dynamics of concurrence-based entanglement in a system of four spin-1/2 particles on a triangular ladder structure [0.0]
  We discuss how tuning the magnetic interactions between elements of a nanomagnetic cell of a triangular ladder which contains four qubits influences on the behavior of entanglement shared between any pairs of the system. It is realized that the generation of quantum W states is an important feature of the present model when the system evolves unitarily with time.
  arXiv  Detail & Related papers  (2020-06-18T09:33:43Z)

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.