Teleportation of a Toffoli gate among distant solid-state qubits with quantum dots embedded in optical microcavities

Hu, Shi; Cui, Wen‐Xue; Wang, Dongyang; Bai, Cheng‐Hua; Guo, Qi; Wang, Hong-Fu; Zhu, Ai‐Dong; Zhang, Shou

doi:10.1038/srep11321

Cited by 36 publications

(14 citation statements)

References 58 publications

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“…The proposed method is related to a high-level abstract (circuit level) of the implementation of a remote n-qubit controlled-U gate, and it is independent of the particular physical system. According to many studies on the feasibility of realizing non-local gates, such as [35][36][37], the proposed method has the potential to be implemented in any existing technology. 2 Comparison of the proposed method with method [30] for the scenario proposed in Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Many studies have been done on the implementation of non-local quantum gates. For example, in [35], the authors demonstrated a deterministic approach to teleporting a Toffoli gate among three distributed electron spin qubits with quantum dots in optical microcavities using an auxiliary electron spin performing measurements on the photons. They demonstrated the feasibility of their scheme with current technology as a way for distributed quantum computing.…”

Section: Introductionmentioning

confidence: 99%

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A general protocol for distributed quantum gates

Sarvaghad-Moghaddam

Zomorodi‐Moghadam

2021

Quantum Inf Process

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In distributed quantum computation, quantum remote-controlled gates are used frequently and applied on separate nodes or subsystems of a network. One of the universal and well-known controlled gates is the n-qubit controlled-NOT gate, especially Toffoli gate for the case of three qubits, which are frequently used to synthesize quantum circuits. In this paper, we considered a more general case, an n-qubit controlled-U gate, and present a general protocol for implementing these gates remotely with minimum required resources. Then, the proposed method is applied to implement a Toffoli gate in bipartite and tripartite systems. In this method, we considered cases in which a group of qubits belongs to one subsystem of the network. Then, we improved its consumption resources.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A general protocol for distributed quantum gates

Sarvaghad-Moghaddam

Zomorodi‐Moghadam

2021

Quantum Inf Process

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“…In 2015, Hu et al . proposed a protocol for deterministic remote implementation of nonlocal Toffoli operation among distant solid-state qubits 47 . In 2018, Lv et al .…”

Section: Introductionmentioning

confidence: 99%

“…The previously protocols for nonlocal remote implementation of two-qubit CNOT operation only consider implement quantum operation in one DOF 47,48 . Different from previously protocols, we present a protocol for parallel nonlocal implementation of the CNOT operation both in polarization DOF and in spatial-mode DOF by using a two-photon four-qubit hyperentangled state as the quantum channel.…”

Section: Introductionmentioning

confidence: 99%

Hyper-parallel nonlocal CNOT operation with hyperentanglement assisted by cross-Kerr nonlinearity

Zhou

2019

Sci Rep

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Implementing CNOT operation nonlocally is one of central tasks in distributed quantum computation. Most of previously protocols for implementation quantum CNOT operation only consider implement CNOT operation in one degree of freedom(DOF). In this paper, we present a scheme for nonlocal implementation of hyper-parallel CNOT operation in polarization and spatial-mode DOFs via hyperentanglement. The CNOT operations in polarization DOF and spatial-mode DOF can be remote implemented simultaneously with hyperentanglement assisited by cross-Kerr nonlinearity. Hyper-parallel nonlocal CNOT gate can enhance the quantum channel capacity for distributed quantum computation and long-distance quantum communication. We discuss the experiment feasibility for hyper-parallel nonlocal gate. It shows that the protocol for hyper-parallel nonlocal CNOT operation can be realized with current technology.

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“…Macroscopic arbitrary entangled coherent states (ECSs) of separate nitrogen-vacancy center ensembles (NVEs) can be generated via the coupling between NVEs and a superconducting flux qubit 42 . Teleportation of a Toffoli gate among three spatially separated electron spin qubits in optical microcavities can be made possible by using the coupling between electron spin and circularly-polarized photons 43 . A microwave photonic quantum bus is proposed for a strong direct coupling between the topological and conventional qubits 44 .…”

mentioning

confidence: 99%

Generating multi-atom entangled W states via light-matter interface based fusion mechanism

Zang

Yang

Özaydın

et al. 2015

Sci Rep

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W state is a key resource in quantum communication. Fusion technology has been proven to be a good candidate for preparing a large-size W state from two or more small-size W states in linear optical system. It is of great importance to study how to fuse W states via light-matter interface. Here we show that it is possible to prepare large-size W-state networks using a fusion mechanism in cavity QED system. The detuned interaction between three atoms and a vacuum cavity mode constitute the main fusion mechanism, based on which two or three small-size atomic W states can be fused into a larger-size W state. If no excitation is detected from those three atoms, the remaining atoms are still in the product of two or three new W states, which can be re-fused. The complicated Fredkin gate used in the previous fusion schemes is avoided here. W states of size 2 can be fused as well. The feasibility analysis shows that our fusion processes maybe implementable with the current technology. Our results demonstrate how the light-matter interaction based fusion mechanism can be realized, and may become the starting point for the fusion of multipartite entanglement in cavity QED system.

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Teleportation of a Toffoli gate among distant solid-state qubits with quantum dots embedded in optical microcavities

Cited by 36 publications

References 58 publications

A general protocol for distributed quantum gates

A general protocol for distributed quantum gates

Hyper-parallel nonlocal CNOT operation with hyperentanglement assisted by cross-Kerr nonlinearity

Generating multi-atom entangled W states via light-matter interface based fusion mechanism

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