Quantum repeater using three-level atomic states in the presence of dissipation: stability of entanglement

• URL: http://arxiv.org/abs/2105.10788v1
• Date: Sat, 22 May 2021 18:37:49 GMT
• Title: Quantum repeater using three-level atomic states in the presence of dissipation: stability of entanglement
• Authors: M Ghasemi, MK Tavassoly
• Abstract summary: We investigate the possibility of transferring entanglement to two three-level separable atomic states over large distance using the quantum repeater protocol. Our model consists of eight three-level atoms where only the pairs (1,2, (3,4), (5,6) and (7,8) are prepared in maximally entangled states.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-sa/4.0/
• Abstract: In this paper we want to investigate the possibility of transferring entanglement to two three-level separable atomic states over large distance using the quantum repeater protocol. In detail, our model consists of eight three-level atoms where only the pairs (1,2), (3,4), (5,6) and (7,8) are prepared in maximally entangled states. Performing suitable interaction between non-entangled three-level atoms (2,3) and (6,7) in two-mode cavities with photon leakage rates in the presence of spontaneous emission leads to producing entanglement between atoms (1,4) and (5,8), separately. Finally, the entanglement between atoms (1,8) is successfully produced by performing interaction between atoms (4,5) while spontaneous emission is considered in a dissipative cavity. In the continuation, the effects of detuning, dissipation and initial interaction time are considered on negativity and success probability of the processes. The maxima of negativity are decreased by increasing the detuning, in most cases. Also, the time evolution of negativity is non-periodic in the presence of dissipation. Increasing the initial interaction time has a constructive effect on negativity in all considered cases. The oscillations of negativity are destroyed as time goes on and the produced entanglement is stabled. The success probability of entangled state of atoms (1,8) is tunable by controlling the detuning and dissipation. We show that via justifying the involved parameters one can arrive at conditions in which the decoherence effects are fully disappeared; as a result an ideal quantum repeater can be achieved while atomic and field dissipations are taken into account.

Related papers

• Long-range interactions in Weyl dense atomic arrays protected from dissipation and disorder [41.94295877935867]
  Long-range interactions are a key resource in many quantum phenomena and technologies. We show how to design the polaritonic bands of these atomic metamaterials to feature a pair of frequency-isolated Weyl points. These Weyl excitations can thus mediate interactions that are simultaneously long-range, due to their gapless nature; robust, due to the topological protection of Weyl points; and decoherence-free, due to their subradiant character.
  arXiv  Detail & Related papers  (2024-06-18T20:15:16Z)
• Coherent Control of Spontaneous Emission for a giant driven $Λ $-type three-level atom [1.9976998521795732]
  Quantum optics with giant atoms provides a new approach for implementing optical memory devices at the atomic scale. We study the relaxation dynamics of a single driven three-level atom interacting with a one-dimensional waveguide.
  arXiv  Detail & Related papers  (2024-05-30T11:03:08Z)
• 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)
• Relativistic aspects of orbital and magnetic anisotropies in the chemical bonding and structure of lanthanide molecules [60.17174832243075]
  We study the electronic and ro-vibrational states of heavy homonuclear lanthanide Er2 and Tm2 molecules by applying state-of-the-art relativistic methods. We were able to obtain reliable spin-orbit and correlation-induced splittings between the 91 Er2 and 36 Tm2 electronic potentials dissociating to two ground-state atoms.
  arXiv  Detail & Related papers  (2021-07-06T15:34:00Z)
• Distributed entangled state production by using quantum repeater protocol [0.0]
  We create entanglement between two far three-level V-type atoms using a quantum repeater protocol. It is observed that the time period of entropy is increased by increasing the mechanical frequency and by decreasing optomechanical coupling strength to the field modes.
  arXiv  Detail & Related papers  (2021-05-28T12:41:53Z)
• Quantum repeater protocol in mixed single- and two-mode Tavis-Cummings models [0.0]
  We study the production of entanglement between two atoms far from each other. Our purpose is to produce entanglement between the atomic pair (1, 8) The effects of detuning, initial interaction time and coupling coeficient on the produced entanglement are investigated.
  arXiv  Detail & Related papers  (2021-05-28T12:33:33Z)
• Quantum repeater protocol using an arrangement of QED-optomechanical hybrid systems [0.0]
  We consider the quantum repeater protocol for distributing the entanglement to two distant three-level atoms. It is shown that, the time period of produced entanglement can be developed by increasing the mechanical frequency.
  arXiv  Detail & Related papers  (2021-05-28T12:01:28Z)
• Dissipative quantum repeater [0.0]
  The aim of this paper is the production of entanglement between two two-level atoms locating far from each other. We consider eight such atoms (1, 2,..., 8) sequentially located in a line which begins (ends) with atom 1 (8). The successfulness of our protocol is shown via the evaluation of concurrence as the well-established measure of entanglement between the two (far apart) qubits (1; 8)
  arXiv  Detail & Related papers  (2021-05-22T18:29:46Z)
• Resonant enhancement of three-body loss between strongly interacting photons [47.30557822621873]
  Rydberg polaritons provide an example of a rare type of system where three-body interactions can be as strong or even stronger than two-body interactions. We show how the shape and strength of dissipative three-body forces can be universally enhanced for Rydberg polaritons.
  arXiv  Detail & Related papers  (2020-10-19T18:21:49Z)
• Collective spontaneous emission of two entangled atoms near an oscillating mirror [50.591267188664666]
  We consider the cooperative spontaneous emission of a system of two identical atoms, interacting with the electromagnetic field in the vacuum state. Using time-dependent theory, we investigate the spectrum of the radiation emitted by the two-atom system. We show that it is modulated in time, and that the presence of the oscillating mirror can enhance or inhibit the decay rate.
  arXiv  Detail & Related papers  (2020-10-07T06:48:20Z)
• A multiconfigurational study of the negatively charged nitrogen-vacancy center in diamond [55.58269472099399]
  Deep defects in wide band gap semiconductors have emerged as leading qubit candidates for realizing quantum sensing and information applications. Here we show that unlike single-particle treatments, the multiconfigurational quantum chemistry methods, traditionally reserved for atoms/molecules, accurately describe the many-body characteristics of the electronic states of these defect centers.
  arXiv  Detail & Related papers  (2020-08-24T01:49:54Z)

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.