Remote Implementation of a Fredkin Gate via Virtual Excitation of an Atom‐Cavity‐Fiber System

Guang-qing, Sun; Wu, Jin‐Lei; Niu, Wei; Yu, Wan-Rang; Ji, Xin

doi:10.1002/andp.201900372

Cited by 8 publications

(5 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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%

“…They demonstrated the feasibility of their scheme with current technology as a way for distributed quantum computing. In [36], authors have implemented a Fredkin gate via the virtual excitation of the atoms, -cavity mode, and -fiber mode by controlling the non-local state-swap of two distant atoms. Their scheme can be useful in distributed quantum computation and remote quantum information processing.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A general protocol for distributed quantum gates

Sarvaghad-Moghaddam

Zomorodi‐Moghadam

2021

Quantum Inf Process

View full text Add to dashboard Cite

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.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A general protocol for distributed quantum gates

Sarvaghad-Moghaddam

Zomorodi‐Moghadam

2021

Quantum Inf Process

View full text Add to dashboard Cite

show abstract

“…In a realistic experiment, cryogenic alkali-metal atoms that have one valence electron, typically such as cold 87 Rb or 133 Cs atoms, are very suitable for the present SWAP gate scheme. Taking an example of 87 Rb, the level construction of the two atoms can be achieved with the hyperfine-split levels for the D2-line transition 5 2 S 1/2 ↔ 5 2 P 3/2 [63,64]. The energy level transitions can be designed as figure 8 which is exactly corresponding to figure 1(b).…”

Section: Experimental Feasibilitymentioning

confidence: 99%

Robust SWAP gate on two distant atoms through virtual excitations and transitionless quantum driving

Zhang

Ding

et al. 2020

Laser Phys. Lett.

View full text Add to dashboard Cite

We propose a scheme for implementing robust SWAP gate on two distant atoms that are confined in two spatially separated single-mode optical cavities connected by an optical fiber. The SWAP gate cannot be attained by using adiabatic passage for such a physical model, but we achieve it by following transitionless quantum driving, a method of shortcuts to adiabatic passage. In addition, during the execution of the SWAP gate, none of two atoms, two cavities and the fiber is excited, and thus the virtual excitations of the fiber-cavity-atom system make the scheme very robust against the atomic spontaneous radiation and the decay of the cavities and the fiber. Numerical simulations show that the SWAP gate can be attained with high fidelity, and the present scheme is insensitive to the control errors of various parameters. The scheme may have potential applications in distributed quantum computing and quantum information process in a quantum network.

show abstract

“…More recently, a remote swap gate through virtual photon and virtual atomic excitation is achieved [15]. Also, proposals of Fredkin Gates and highdimensional entangled states have been proposed [16]. Experimentally, dressed states of two separated atoms with the atomcavity-fiber system have been observed [17].…”

Section: Introductionmentioning

confidence: 99%

Quantum Zeno dynamics induced atomic entanglement in a hybrid atom-cavity-fiber system

Chen¹,

Fang²,

Xiong³

2020

Laser Phys. Lett.

View full text Add to dashboard Cite

Quantum entanglement is important quanum resources in quantum information sicence. Here we propose an approach to preparing atomic quantum entanglement in a hybrid atom-cavity-fiber system. Using quantum Zeno dynamics method, the system evolution states are always split into a series of Zeno invariant subspaces consisting of dark and bright states. By choosing the initial state of the system, the bright states are all neglected and only dark states are kept to build the effective Hamiltonian. By tuning the system parameters, two-atom multiple-dimensional entanglement, two-atom Bell state, and three-atom GHZ state can be realized by one step.Our proposal provides a way to perform quantum information processing with dark states.

show abstract

Remote Implementation of a Fredkin Gate via Virtual Excitation of an Atom‐Cavity‐Fiber System

Cited by 8 publications

References 46 publications

A general protocol for distributed quantum gates

A general protocol for distributed quantum gates

Robust SWAP gate on two distant atoms through virtual excitations and transitionless quantum driving

Quantum Zeno dynamics induced atomic entanglement in a hybrid atom-cavity-fiber system

Contact Info

Product

Resources

About