Realization of the quantum CNOT gate based on multiphoton process in multimode Cavity QED

Hammani, M.; Chouikh, A.; Саид, Т.; Беннаи, М.

doi:10.1007/s11082-020-02685-y

Cited by 2 publications

(1 citation statement)

References 46 publications

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“…The QRM can be reduced to a Jaynes-Cummings model [11] when we are in the weakcoupling regime, which is the appropriate characterization in most experimental setups of quantum cavity electrodynamics (CQED) [12,13,14].…”

Section: Introductionmentioning

confidence: 99%

Ultrastrong coupling regime of the two-photon quantum Rabi model: a Numerical Approach

Hammani¹,

Jineral²,

Bennai³

2022

Preprint

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In this paper, some physical observables such as the energy spectra and time dynamics as well as the photon statistics of the two-photon quantum Rabi model in the ultrastrong coupling regime are numerically explored. The main aim of this work is to show the effect of the number of cavity fock states N on the spectral properties, particularly the special feature spectral collapse at critical coupling gc=ꞷc/2. We have shown that for a large number of cavity fock states the numberof discrete energy levels decreases down to only one at the collapse point. Secondly, we have simulated the time dynamics behaviors as well as the photon statistics, at the final state, of the two-photon quantum Rabi model in the ultrastrong coupling regime. PACS numbers: 03.67.Lx, 85.25.Dq, 42.50.Dv

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Section: Introductionmentioning

confidence: 99%

Ultrastrong coupling regime of the two-photon quantum Rabi model: a Numerical Approach

Hammani¹,

Jineral²,

Bennai³

2022

Preprint

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Implementation of Photonic Phase Gate and Squeezed States via a Two-Level Atom and Bimodal Cavity

et al. 2022

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We propose a theoretical model for realizing a photonic two-qubit phase gate in cavity QED using a one-step process. The fidelity and probability of success of the conditional quantum phase gate is very high in the presence of cavity decay. Our scheme only employs one two-level atom, and thus is much simpler than other schemes involving multi-level atoms. This proposal can also be applied to generate two-mode squeezed states; therefore, we give three examples, i.e., the two-mode squeezed vacuum state, two-mode squeezed odd coherent state, and two-mode squeezed even coherent state, to estimate the variance of Duan’s criterion when taking into account cavity decay. It is shown that the variance is smaller than 2 for the three squeezed states in most cases. Furthermore, we utilize logarithmic negativity to measure the entanglement, and find that these squeezed states have very high degrees of entanglement.

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Realization of the quantum CNOT gate based on multiphoton process in multimode Cavity QED

Cited by 2 publications

References 46 publications

Ultrastrong coupling regime of the two-photon quantum Rabi model: a Numerical Approach

Ultrastrong coupling regime of the two-photon quantum Rabi model: a Numerical Approach

Implementation of Photonic Phase Gate and Squeezed States via a Two-Level Atom and Bimodal Cavity

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