Implementation of atomic fast population transfer in separate cavities via shortcut to adiabatic passage
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ORIGINAL PAPER
Implementation of atomic fast population transfer in separate cavities via shortcut to adiabatic passage S-Y Hao1*, S-L Lin2 and C-L Zhang3 1
The Center of Experiment, Fujian Police College, Fuzhou 350007, China 2
Fujian Agriculture and Forestry University, Fuzhou 350007, China 3
Fujian Yango University, Fuzhou 350015, China
Received: 01 November 2018 / Accepted: 21 July 2019
Abstract: Based on the invariant-based inverse engineering and quantum Zeno dynamics, we design time-dependent resonant laser pulses to speed up the population transfer in two spatially separated K-type atoms. Through designing a virtual dark state for the evolution of the system, we can rapidly achieve a perfect population transfer in an ordinary cavity quantum electrodynamics system. We also discuss the influence of decoherence by numerical computation, and the result proves that this method is insensitive to the cavity decay and atomic spontaneous dissipation. In addition, this method is robust against the amplitude fluctuations of most of the parameters. Keywords: Fast population transfer; Invariant-based inverse engineering; Separate cavities PACS Nos.: 03.67. Pp; 03.67. Mn; 03.67. HK
1. Introduction Adiabatic passage technique is an extensive and important technique in the field of quantum information science. Many researchers have proposed some schemes for achieving quantum information process (QIP) with the help of adiabatic passage technique. For example, Lu et al. [1] put forward a scheme for using adiabatic dynamic to drive three atoms into a singlet state in an optical cavity; Hao et al. [2] proposed a scheme of generation of multiatom GHZ states in separate cavities via adiabatic passage. Both schemes have some disadvantages; for example, the p pulse speed is fast, but it is highly sensitive to the change in the pulse area and the inhomogeneity of the sample. Adiabatic passage technique is robust against to the change in experimental parameters, but it usually takes a relatively long interaction time. And if it takes too long interaction time, the scheme will be useless. In recent years, researchers have presented several approaches to accelerate the adiabatic passage [3–7]. Inspired by these approaches, this thesis is devoted to making an investigation on the
*Corresponding author, E-mail: [email protected]
application of shortcuts to adiabaticity in different systems and using the shortcut methods to achieve the rapid preparation and manipulation of quantum states. On the other hand, the quantum Zeno effect can inhibit the transitions between quantum states by frequent measurements which has been tested in a number of experiments [8–11]. The system evolves from its initial state, and it remains what is so-called Zeno subspace for the reason that the measurements are frequently made which project the system onto a multidimensional subspace. This is socalled quantum Zeno dynamics (QZD) proposed by Facchi and Pascazio in 2002 [12]. The cavity quantum electronic dynamics (QED) system opens up new prospects fo
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