Teleportation with two-dimensional electron gas formed at the interface of a GaAs heterostructure

Adepoju, Adenike Grace; Falaye, Babatunde J.; Sun, Guo Hua; Camacho-Nieto, Oscar; Dong, Shi‐Hai

doi:10.1088/1555-6611/aa5492

Cited by 5 publications

(3 citation statements)

References 14 publications

(38 reference statements)

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“…This demonstration is another supportive evidence that justifies quantum entanglement as the key resource in quantum information science, and it also represents the continuation of Refs. [7,25]. …”

Section: Resultsmentioning

confidence: 99%

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Quantum teleportation and information splitting via four-qubit cluster state and a Bell state

Ramírez¹,

Falaye²,

Sun³

et al. 2017

Front. Phys.

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Quantum teleportation provides a 'bodiless' way of transmitting the quantum state from one object to another, at a distant location, using a classical communication channel and a previously shared entangled state. In this paper, we present a tripartite scheme for probabilistic teleportation of an arbitrary single qubit state, without losing the information of the state being teleported, via a four-qubit cluster state of the form |φ 1234 = α|0000 + β|1010 + γ|0101 − η |1111 , as the quantum channel, where the nonzero real numbers α, β, γ, and η satisfy the relation |α| 2 +|β| 2 +|γ| 2 +|η| 2 = 1. With the introduction of an auxiliary qubit with state |0 , using a suitable unitary transformation and a positive-operator valued measure (POVM), the receiver can recreate the state of the original qubit. An important advantage of the teleportation scheme demonstrated here is that, if the teleportation fails, it can be repeated without teleporting copies of the unknown quantum state, if the concerned parties share another pair of entangled qubit. We also present a protocol for quantum information splitting of an arbitrary two-particle system via the aforementioned cluster state and a Bellstate as the quantum channel. Problems related to security attacks were examined for both the cases and it was found that this protocol is secure. This protocol is highly efficient and easy to implement.

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Section: Resultsmentioning

confidence: 99%

“…After the first teleportation protocol was proposed by Bennett et al, many researchers have proposed several quantum teleportation protocols ( [2][3][4][5][6][7][8][9][10][11] and Refs. therein).…”

Section: Introductionmentioning

confidence: 99%

Quantum teleportation and information splitting via four-qubit cluster state and a Bell state

Ramírez¹,

Falaye²,

Sun³

et al. 2017

Front. Phys.

Self Cite

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“…The spatial entanglement properties are of interest to realize solid state all-electronic quantum computing devices. To this end, there have been several proposals to define deterministic teleportation protocols for quantum information processing in semiconducting nanowires [32], double QDs [33,34], quantum dot arrays [35], and coupled quantum wires [36]. Applications of spatial entanglement as an indicator for bound and unbound states [37], as well as the effects of a magnetic field on entanglement have been discussed earlier [38].…”

Section: Introductionmentioning

confidence: 99%

Tuning spatial entanglement in interacting two-electron quantum dots

2020

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Confined geometries such as semiconductor quantum dots are promising candidates for fabricating quantum computing devices. When several quantum dots are in proximity, spatial correlation between electrons in the system becomes significant. In this article, we develop a fully variational action integral formulation for calculating accurate few-electron wavefunctions in configuration space, irrespective of potential geometry. To evaluate the Coulomb integrals with high accuracy, a novel numerical integration method using multiple Gauss quadratures is proposed. Using this approach, we investigate the confinement of two electrons in double quantum dots, and evaluate the spatial entanglement. We investigate the dependence of spatial entanglement on various geometrical parameters. We derive the two-particle wavefunctions in the asymptotic limit of the separation distance between quantum dots, and obtain universal saturation values for the spatial entanglement. Resonances in the entanglement values due to avoided level-crossings of states are observed. We also demonstrate the formation of electron clusters, and show that the entanglement value is a good indicator for the formation of such clusters. Further, we show that a precise tuning of the entanglement values is feasible with applied external electric fields.

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