Quantum iSWAP gate in optical cavities with a cyclic three-level system
Sign Up to like & getrecommendations! Published in 2018 at "Quantum Information Processing"
DOI: 10.1007/s11128-018-1836-7
Abstract: In this paper we present a scheme to directly implement the iSWAP gate by passing a cyclic three-level system across a two-mode cavity quantum electrodynamics. In the scheme, a three-level $$\Delta $$Δ-type atom ensemble prepared… read more here.
Keywords: level system; iswap gate; level; three level ... See more keywords
Coherently driving a single quantum two-level system with dichromatic laser pulses
Sign Up to like & getrecommendations! Published in 2019 at "Nature Physics"
DOI: 10.1038/s41567-019-0585-6
Abstract: Efficient excitation of a single two-level system usually requires that the driving field is at the same frequency as the atomic transition. However, the scattered laser light in solid-state implementations can dominate over the single… read more here.
Keywords: two level; level system; excitation; single quantum ... See more keywords
Clock transition by continuous dynamical decoupling of a three-level system
Sign Up to like & getrecommendations! Published in 2018 at "Scientific Reports"
DOI: 10.1038/s41598-018-31984-4
Abstract: We present a novel continuous dynamical decoupling scheme for the construction of a robust qubit in a three-level system. By means of a clock transition adjustment, we first show how robustness to environmental noise is… read more here.
Keywords: level system; transition; clock transition; dynamical decoupling ... See more keywords
An Exact Approach to Elimination of Leakage in a Qubit Embedded in a Three-level System
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DOI: 10.1038/s41598-019-47479-9
Abstract: Leakage errors damage a qubit by coupling it to other levels. Over the years, several theoretical approaches to dealing with such errors have been developed based on perturbation arguments. Here we propose a different strategy:… read more here.
Keywords: leakage; level system; three level; qubit ... See more keywords
Exceptional points of the Lindblad operator of a two-level system
Sign Up to like & getrecommendations! Published in 2019 at "Molecular Physics"
DOI: 10.1080/00268976.2019.1593535
Abstract: The Lindblad equation for a two-level system under an electric field is analyzed by mapping to a linear equation with a non-Hermitian matrix. Exceptional points of the matrix are found to be extensive; the second-order… read more here.
Keywords: two level; exceptional points; level system; points lindblad ... See more keywords
Optical gain in an optically driven three-level system in atomic Rb vapor
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Modern Optics"
DOI: 10.1080/09500340.2017.1391958
Abstract: Abstract In this work, we report experimentally achieved optical gain of a weak probe beam in a three-level system in a low density Rubidium vapor cell driven by a single pump beam. The maximum measured… read more here.
Keywords: three level; gain; level system; optical gain ... See more keywords
Experimental violation of the Leggett-Garg inequality in a three-level system
Sign Up to like & getrecommendations! Published in 2017 at "New Journal of Physics"
DOI: 10.1088/1367-2630/aa5c51
Abstract: The Leggett–Garg (LG) test of macroscopic realism involves a series of dichotomic non-invasive measurements that are used to calculate a function which has a fixed upper bound for a macrorealistic system and a larger upper… read more here.
Keywords: system; level system; level; upper bound ... See more keywords
Analytical results for a parity-time-symmetric two-level system under synchronous combined modulations
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DOI: 10.1103/physreva.95.052128
Abstract: We propose a simple method of combined synchronous modulations to generate the analytically exact solutions for a parity-time symmetric two-level system. Such exact solutions are expressible in terms of simple elementary functions and helpful for… read more here.
Keywords: two level; parity time; system; time symmetric ... See more keywords
Magnus expansion for a chirped quantum two-level system
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DOI: 10.1103/physreva.98.023855
Abstract: We derive a Magnus expansion for a frequency chirped quantum two-level system. We obtain a time-independent effective Hamiltonian which generates a stroboscopic time evolution. At lowest order the according dynamics is identical to results from… read more here.
Keywords: two level; level system; expansion; quantum two ... See more keywords
Exceptional points and dynamics of an asymmetric non-Hermitian two-level system
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DOI: 10.1103/physreva.98.042117
Abstract: We investigated a damped two-level system interacting with a circularly polarised light as described by an asymmetric non-hermitian Hamiltonian. This is a simple enough system to be studied analytically while complicated enough to exhibit a… read more here.
Keywords: two level; exceptional points; system; level system ... See more keywords