Deterministic generation of a three-dimensional entangled state via quantum Zeno dynamics

Li, Wen-An; Huang, Guang-Yao

doi:10.1103/physreva.83.022322

Cited by 52 publications

(36 citation statements)

References 43 publications

(57 reference statements)

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“…Here, we propose a scheme for realization of multiqubit tunable phase gate with only one step. This scheme differs remarkably from others due to the fact that we employ the quantum Zeno dynamics [29][30][31][32][33] and the distributed experimental setup where n − 1 qubits located in n − 1 different resonators respectively. Compared with previous proposals, our scheme owns several advantages as following: (i) individual addressing on each qudit is not required and only a classical microwave pulse is needed to drive the central qudit A, which greatly loosens the requirement for the experimental conditions; (ii) the time needed to complete the gate can be reached to the order of nanosecond, which is much faster than previous schemes [20,24]; (iii) in the non-resonant case, the phase is tunable.…”

Section: Introductionmentioning

confidence: 99%

Simplified proposal for realizing a multiqubit tunable phase gate in circuit QED

Chen

2017

J. Opt. Soc. Am. B

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We propose a scheme to realize multiqubit tunable phase gate in a circuit QED setup where two resonators each coupling with a qudit are interconnected to a common qudit (d = 4). In this proposal, only two levels of each qudit serve as the logical states and other two levels are used for the gate realization. The proposal is efficient and simple because only a classical microwave pulse is needed, no matter how many qudits are involved, which significantly reduces experimental difficulty. In non-resonant case, the tunable phase gate can be achieved readily, while under the resonant condition a π-phase gate can be realized after a full cycle of Rabi oscillation where the gate speed is rather fast due to the resonant interaction. We have shown that the resulting effective dynamics allows for the creation of high fidelity phase gate. The influence of various decoherence processes such as the decay of the resonator mode, and the relaxation of the qudits is investigated.Moreover, the proposed scheme can be easily generalized to realize N -qubit phase gate.

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Section: Introductionmentioning

confidence: 99%

Simplified proposal for realizing a multiqubit tunable phase gate in circuit QED

Chen

2017

J. Opt. Soc. Am. B

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“…One can also generate highly entangled states by cooling two atoms inside an optical cavity into a stationary state [24]. The generation of a three-dimensional entangled state for two atoms trapped in a cavity has been proposed via quantum Zeno dynamics [25], which scheme has been generalized to N-dimensional entanglement of two atoms. * alexanian@uncw.edu…”

Section: Introductionmentioning

confidence: 99%

Dynamical generation of maximally entangled states in two identical cavities

Alexanian

2011

Phys. Rev. A

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The generation of entanglement between two identical coupled cavities, each containing a single three-level atom, is studied when the cavities exchange two coherent photons and are in the N = 2,4 manifolds, where N represents the maximum number of photons possible in either cavity. The atom-photon state of each cavity is described by a qutrit for N = 2 and a five-dimensional qudit for N = 4. However, the conservation of the total value of N for the interacting two-cavity system limits the total number of states to only 4 states for N = 2 and 8 states for N = 4, rather than the usual 9 for two qutrits and 25 for two five-dimensional qudits. In the N = 2 manifold, two-qutrit states dynamically generate four maximally entangled Bell states from initially unentangled states. In the N = 4 manifold, two-qudit states dynamically generate maximally entangled states involving three or four states. The generation of these maximally entangled states occurs rather rapidly for large hopping strengths. The cavities function as a storage of periodically generated maximally entangled states.

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“…This continuing time evolution within the projected subspace is just the quantum Zeno dynamics (QZD). So far, numerous schemes have been proposed to implement QC and QIP via QZD [36,[41][42][43][44]. In Ref.…”

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confidence: 99%

One-step implementation of a Toffoli gate of separated superconducting qubits via quantum Zeno dynamics

Chen

Song-She

2015

Quantum Inf Process

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Based on the quantum Zeno dynamics, a scheme is presented to implement a Toffoli gate of three separated superconducting qubits (SQs) by one step. Three separated SQs are connected by two resonators. The scheme is insensitive to the resonator decay because the Zeno subspace does not include the state of the resonators being excited. Numerical simulations indicate that the scheme is robust to the fluctuation of the parameters and the Toffoli gate can be implemented with high fidelity.

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Deterministic generation of a three-dimensional entangled state via quantum Zeno dynamics

Cited by 52 publications

References 43 publications

Simplified proposal for realizing a multiqubit tunable phase gate in circuit QED

Simplified proposal for realizing a multiqubit tunable phase gate in circuit QED

Dynamical generation of maximally entangled states in two identical cavities

One-step implementation of a Toffoli gate of separated superconducting qubits via quantum Zeno dynamics

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