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首页> 外文期刊>Physical review >Population transfer in a Lambda system induced by detunings
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Population transfer in a Lambda system induced by detunings

机译：失谐引起的Lambda系统中的人口转移

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摘要

In this paper we propose a protocol to achieve coherent population transfer between two states in a three-level atom by using two ac fields. It is based on the physics of stimulated Raman adiabatic passage (STIRAP), but it is implemented with the constraint of a reduced control, namely, one of the fields cannot be switched off. A combination of frequency chirps is used with resonant fields, allowing us to achieve approximate destructive interference, despite the fact that an exact dark state does not exist. This chirped STIRAP protocol is tailored for applications to artificial atoms, where architectures with several elementary units can be strongly coupled but where the possibility of switching on and off such couplings is often very limited. Demonstration of this protocol would be a benchmark for the implementation of a class of multilevel advanced control procedures for quantum computation and microwave quantum photonics in artificial atoms.
机译：在本文中，我们提出了一种协议，该协议通过使用两个ac场来实现三能级原子中两个状态之间的相干种群转移。它基于受激拉曼绝热通道（STIRAP）的物理原理，但是在减少控制的约束下实现，即无法关闭其中一个磁场。尽管不存在精确的暗态，但将频率线性调频与谐振场结合使用，可以使我们获得近似的破坏性干扰。这种chi的STIRAP协议是为人造原子量身定制的，在人造原子中，具有几个基本单元的体系结构可以牢固地耦合，但是打开和关闭这种耦合的可能性通常非常有限。该协议的演示将为在人工原子中实现量子计算和微波量子光子学的一类多级高级控制程序的实现提供基准。

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  • 来源
    《Physical review》 |2015年第22期|224506.1-224506.8|共8页
  • 作者

    P. G. Di Stefano; E. Paladino; A. DArrigo; G. Falci;

  • 作者单位

    Dipartimento di Fisica e Astronomia, Universita di Catania, Via Santa Sofia 64, 95123 Catania, Italy;

    Dipartimento di Fisica e Astronomia, Universita di Catania, Via Santa Sofia 64, 95123 Catania, Italy,CNR-IMM UOS Universita (MATIS), Consiglio Nazionale delle Ricerche, Via Santa Sofia 64, 95123 Catania, Italy,Istituto Nazionale di Fisica Nucleare, Via Santa Sofia 64, 95123 Catania, Italy;

    Dipartimento di Fisica e Astronomia, Universita di Catania, Via Santa Sofia 64, 95123 Catania, Italy,CNR-IMM UOS Universita (MATIS), Consiglio Nazionale delle Ricerche, Via Santa Sofia 64, 95123 Catania, Italy;

    Dipartimento di Fisica e Astronomia, Universita di Catania, Via Santa Sofia 64, 95123 Catania, Italy,CNR-IMM UOS Universita (MATIS), Consiglio Nazionale delle Ricerche, Via Santa Sofia 64, 95123 Catania, Italy,Istituto Nazionale di Fisica Nucleare, Via Santa Sofia 64, 95123 Catania, Italy;

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  • 正文语种 eng
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  • 关键词

    quantum computation; effects of atomic coherence on propagation, absorption, and amplification of light; electromagnetically induced transparency and absorption; decoherence; open systems; quantum statistical methods; superconducting devices;

    机译：量子计算原子相干性对光的传播;吸收和放大的影响;电磁感应的透明性和吸收性;退相干开放系统;量子统计方法;超导装置;

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