Stimulated Raman adiabatic passage in the field of finite duration pulses
M. V. Gromovyi, V. I. Romanenko, L. P. Yatsenko
在考虑光脉冲起始和结束时的非绝热过程的三能级λ方案中，发展了原子或分子与光相互作用的受激喇曼绝热通过理论。
The theory of stimulated Raman adiabatic passage in a three-level Lambda-scheme of the interaction of an atom or molecule with light, which takes the nonadiabatic processes at the beginning and the end of light pulses into account, is developed.
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Theory of bright-state stimulated Raman adiabatic passage
本文用解析和数值方法描述了脉冲在介质中传输时，受激喇曼绝热通过亮态的布居转移过程。绝热性的局限性进行了分析和解释的重塑的脉冲。我们发现参数的脉冲，人口转移是近完成长距离。
We propose a scheme which can produce desired nonadiabatic passages for the stimulated Raman transition in three-level systems. The state transfer in the protocol is realized by following the evolution of the dynamical basis itself and no additional coupling field is required. We also investigate the interplay between the present nonadiabatic protocol and the shortcut to adiabaticity. By incorporating the latter technology, we show that alternative passages with less occupancy of the intermediate level could be designed.
Geometric phase gates based on stimulated Raman adiabatic passage in tripod systems
我们考虑了三脚架系统中的受激拉曼绝热通过（STIRAP）过程，并展示了如何产生所涉及的量子态的纯几何相变。几何相位由三个激光场控制，其中脉冲形状、相对场强和相位可以控制。基于这些几何相位，我们提出了一组适用于量子计算的通用门：一个量子位相位门，一个Hadamard门和一个两量子位相位门。
Stimulated Raman adiabatic passage in a multi-level atom
本文给出了描述多能级原子受激拉曼绝热过程的一般形式。假设原子具有两个基态流形a和b以及一个激发态流形e，绝热过程是通过与含时场共振驱动a-e和b-e跃迁实现的.我们的形式主义给出了一个完整的描述的绝热通过过程，并可以应用到系统中的任意数量的退化状态在每个流形和任意耦合的a-e和b-e过渡。我们说明的形式主义，将其应用到一个简单的玩具模型和绝热通过铯原子。
Ultrafast stimulated Raman parallel adiabatic passage by shaped pulses
提出了一种基于{ \it平行绝热通道}的飞秒整形脉冲布居转移技术。它们的幅度和相位被专门设计为优化对应于平行本征值的绝热通道。我们表明，这种技术允许强大的绝热人口转移的拉曼系统中的总脉冲面积低至3 $π$，对应于一个数量级低于传统的受激拉曼绝热通道过程的注量。这种短持续时间的过程，通常是皮秒和亚皮秒，很容易实现与现代脉冲整形器技术，并打开了超快的强大的人口转移的可能性与有趣的应用在量子信息处理。
Non-Hermitian shortcut to stimulated Raman adiabatic passage
我们提出了一个非厄米推广的受激拉曼绝热通道（STIRAP），它允许一个增加的速度和保真度的绝热通道。这是通过在哈密顿量的对角（裸能量）项中添加平衡虚（增益/损耗）项并选择它们来实现的，使得它们恰好抵消非绝热耦合，以这种方式提供了绝热性的有效捷径。值得注意的是，对于在反直觉方案中使用延迟高斯形脉冲的STIRAP，哈密顿量的虚部项是与时间无关的。提出了一种基于光在三个倏逝耦合光波导中传输的非厄米STIRAP的可能物理实现。
Stimulated Raman adiabatic passage (STIRAP) is a widely used protocol to realize high-fidelity and robust quantum control in various quantum systems. However, further application of this protocol in superconducting qubits is limited by population leakage caused by the only weak anharmonicity. Here we introduce an optimally controlled shortcut-to-adiabatic (STA) technique to speed up the STIRAP protocol in a superconducting qudit. By modifying the shapes of the STIRAP pulses, we experimentally realize a fast (32 ns) and high-fidelity quantum state transfer. In addition, we demonstrate that our …
Stimulated Raman Adiabatic Passage in Tm$^{3+}$:YAG
本文报道了Tm $^{3+}$：YAG晶体中受激拉曼绝热通过（STIRAP）的实验研究。Tm $^{3+}$：YAG在量子信息处理应用中是一种很有前途的材料，但迄今为止，在这种材料中的相干拉曼过程的实验研究很少。研究了非均匀展宽和拉比频率对转移效率和双光子谱宽度的影响。完整的Tm $^{3+}$：YAG系统的模拟，以及相应的实验结果。
Generation of Dicke States with Phonon-Mediated Multi-level Stimulated Raman Adiabatic Passage
我们产生了两个和四个离子的半激发对称Dicke态。我们采用多能级受激拉曼绝热通道（STIRAP），其中间态是声子Fock态。这个过程对应于自旋压缩操作，并且在多能级STIRAP过程中产生半激发Dicke态。这种方法不需要对每个离子进行局部访问或制备声子Fock态。此外，由于它是一个绝热过程，因此它是稳健的。我们评估的迪克状态使用见证算子和确定的保真度的上限和下限，而不使用全量子层析成像。
Quantum control methods for three-level systems have become recently an important direction of research in quantum information science and technology. Here we present numerical simulations using realistic experimental parameters for quantum process tomography in STIRAP (stimulated Raman adiabatic passage) and saSTIRAP (superadiabatic STIRAP). Specifically, we identify a suitable basis in the operator space as the identity operator together with the 8 Gell-Mann operators, and we calculate the corresponding process matrices, which have $9\times 9=81$ elements. We discuss these results for the id…
Composite stimulated Raman adiabatic passage
介绍了一种用于三态量子系统相干控制的高保真技术，它结合了两种流行的控制工具-受激拉曼绝热通道（STIRAP）和复合脉冲。通过使用具有适当相位的部分延迟脉冲对的复合序列，可以通过相消干涉将阻止STIRAP达到单位保真度的非绝热跃迁消除到任意阶，因此可以使该技术任意精确。复合相位由简单的解析公式给出，不依赖于特定的脉冲形状、脉冲延迟和脉冲面积，具有普适性。
Efficient coherent internal state transfer in trapped ions using Stimulated Raman Adiabatic Passage
我们实验证明了如何受激拉曼绝热通道（STIRAP）的过程中可以利用有效的相干内部状态转移在单个捕获和激光冷却的$^{40}$钙$^+$离子。通过荧光测量检测从D $_{3/2}$到D $_{5/2}$状态的转移，揭示未转移到D $_{5/2}$状态的群体。在一个装置中，已获得了95%的相干布居转移效率的水平，允许在一个字符串中的单个离子的内部状态检测。
We apply the inverse geometric optimization technique to generate an optimal and robust stimulated Raman exact passage (STIREP) considering the loss of the upper state as a characterization parameter. Control fields temporal shapes that are optimal with respect to pulse area, energy, and duration, are found to form a simple sequence with a combination of intuitively (near the beginning and the end) and counter-intuitively ordered pulse pairs. The resulting dynamics produces a loss which is about a third of that of the non-robust optimal STIREP. Alternative optimal solutions featuring lower los…
Vacuum-Stimulated Raman Scattering based on Adiabatic Passage in a High-Finesse Optical Cavity
报道了利用高精细度光腔的真空场实现的λ型三能级原子受激喇曼散射的首次观测。该方案基于泵浦光与腔场之间的反直觉相互作用序列，利用绝热通过技术产生一个腔内光子。这个光子通过反射率较低的镜子离开谐振腔。发射率表现出的特征依赖于腔和泵的失谐量，所观察到的光谱有一个亚自然的线宽。计算结果与数值模拟结果吻合良好。
Decoherence-free preparation of Dicke states of trapped ions by collective stimulated Raman adiabatic passage
我们提出了一个简单的技术，用于产生任意大小的Dicke态的囚禁离子链。该方法使用两对延迟但部分重叠的激光脉冲来全局寻址整个链，以沿着多离子暗态设计集体绝热通道。我们的技术，这是一个多粒子的受激拉曼绝热通道（STIRAP）的推广，是消相干自由相对于自发发射和鲁棒性对实验参数的适度波动。此外，由于该过程非常迅速，在实际实验条件下加热的影响几乎可以忽略不计。我们预测，整体保真度的迪克状态的合成涉及十个离子共享两个激发应接近98%，目前可实现的实验参数。
Optimum pulse shapes for stimulated Raman adiabatic passage
受激拉曼绝热通道（STIRAP），驱动脉冲的最佳形状和延迟有可能达到足够高的结晶度，使其适用于容错量子信息处理。最佳脉冲形状后，得到减少STIRAP有效的两状态系统。我们使用的Dykhne-Davis-Pechukas（DDP）的方法，以尽量减少非绝热转变，并最大限度地提高保真度的STIRAP。这导致驱动拉曼过程的两个场的脉冲形状之间的特定关系。的DDP优化版本的STIRAP保持其对脉冲强度和持续时间的变化，单光子失谐和可能的损失从中间状态的鲁棒性。
Stimulated Raman adiabatic passage (STIRAP) is a widely-used technique of coherent state-to-state manipulation for many applications in physics, chemistry, and beyond. The adiabatic evolution of the state involved in STIRAP, called adiabatic passage, guarantees its robustness against control errors, but also leads to problems of low efficiency and decoherence. Here we propose and experimentally demonstrate an alternative approach, termed stimulated Raman "user-defined" passage (STIRUP), where a parameterized state is employed for constructing desired evolutions to replace the adiabatic passage…
We study the scattering problem of photon and polariton in a one-dimensional coupled-cavity system. Analytical approximate analysis and numerical simulation show that a photon can stimulate the photon emission from a polariton through polariton-photon collisions. This observation opens the possibility of photon-stimulated transition from insulating to radiative phase in a coupled-cavity QED system. Inversely, we also find that a polariton can be generated by a two-photon Raman scattering process. This paves the way towards single photon storage by the aid of atom-cavity interaction.
We experimentally demonstrate composite stimulated Raman adiabatic passage (CSTIRAP), which combines the concepts of composite pulse sequences and adiabatic passage. The technique is applied for population transfer in a rare-earth doped solid. We compare the performance of CSTIRAP with conventional single and repeated STIRAP, either in the resonant or the highly detuned regime. In the latter case, CSTIRAP improves the peak transfer efficiency and robustness, boosting the transfer efficiency substantially compared to repeated STIRAP. We also propose and demonstrate a universal version of CSTIRA…
Efficient initialization and manipulation of quantum states is important for numerous applications and it usually requires the ability to perform high fidelity and robust swapping of the populations of quantum states. Stimulated Raman adiabatic passage (STIRAP) has been known to perform efficient and robust inversion of the ground states populations of a three-level system. However, its performance is sensitive to the initial state of the system. In this contribution we demonstrate that a slight modification of STIRAP, where we introduce a non-zero single-photon detuning, allows for efficient …
Microwave pulse sequences are the basis of coherent manipulation of the electronic spin ground state in nitrogen-vacancy (NV) centers. In this work we demonstrate stimulated Raman transitions (SRT) and stimulated Raman adiabatic passage (STIRAP), two ways to drive the dipole-forbidden transition between two spin sublevels in the electronic triplet ground state of the NV center. This is achieved by a multitone Raman microwave pulse which simultaneously drives two detuned transitions via a virtual level for SRT or via two adiabatic and partially overlapping resonant microwave pulses for STIRAP. …
Perfect stimulated Raman adiabatic passage with imperfect finite-time pulses
本文通过优化双高斯脉冲的截断与相对位置，在STIRAP中实现完美粒子数转移，并提出简单有效的绝热性判据，证明所需时间仅与不保真度成对数关系。
Accurate control of a quantum system is a fundamental requirement in many areas of modern science ranging from quantum information processing to high-precision measurements. A significantly important goal in quantum control is to prepare a desired state as fast as possible with sufficiently high fidelity allowed by available resources and experimental constraints. Stimulated Raman adiabatic passage (STIRAP) is a robust way to realize high-fidelity state transfer but it requires a sufficiently long operation time to satisfy the adiabatic criteria. We here theoretically propose and then experime…
Spectral splitting of a stimulated Raman transition in a single molecule
针对单分子水平拉曼散射研究的难点，研究人员通过共模共振、大振动频差及低温条件实现单分子相干受激拉曼跃迁，观测到特征光谱劈裂并建模，为固态量子光学等应用奠定基础。
High fidelity state mapping performed in a V-type level structure via stimulated Raman transition
证明了在单个矩形激光脉冲作用下，V型量子系统的激发态中编码的量子比特不能完全转换到腔场模的态。这个障碍可以通过使用两阶段协议来克服，其中状态映射操作的保真度可以增加到接近1。
The interaction between ultrashort light pulses and non-absorbing materials is dominated by Impulsive Stimulated Raman Scattering (ISRS). The description of ISRS in the context of pump\&probe experiments is based on effective classical models describing the interaction between the phonon and pulsed electromagnetic fields. Here we report a theoretical description of ISRS where we do not make any semi-classical approximation and we treat both photonic and phononic degrees of freedom at the quantum level. The results of the quantum model are compared with semiclassical results and validated by me…
We describe how stimulated Raman adiabatic passage (STIRAP) can be applied to create spectral holes in an inhomogeneously broadened system. Due to the robustness of STIRAP, our proposal guarantees high flexibility and accuracy and, at variance with traditional spectral hole burning techniques, it may require substantially less time resources since it does not rely upon the spontaneous decay of an intermediate excited state. We investigate the effects on the scheme of dephasing and dissipation as well as of unintentional driving of undesired transitions due to a finite splitting of the initial …
Stimulated Raman adiabatic passage is a quantum protocol that can be used for robust state preparation in a three-level system. It has been commonly employed in quantum optics, but recently this technique has drawn attention also in circuit quantum electrodynamics. The protocol relies on two slowly varying drive pulses that couple the initial and the target state via an intermediate state, which remains unpopulated. Here we study the detrimental effect of the parasitic couplings of the drives into transitions other than those required by the protocol. The effect is most prominent in systems wi…
Enhancing the fidelity of stimulated Raman transitions with simple phase shifts
本文提出在受激拉曼跃迁的控制场中引入简单相移，以提升态操控保真度并减少中间激发态泄漏，实现任意失谐下的高保真量子门操作，且不增加演化时间，对误差和耗散具有更强鲁棒性。
Stimulated Raman Adiabatic Passage via bright state in Lambda medium of unequal oscillator strengths
本文研究了在不同振子强度的λ型原子介质中，考虑传播效应的受激拉曼绝热通过亮态（b-STIRAP）的布居转移过程。用解析和数值计算方法证明了粒子数转移效率对跃迁振子强度比q_p/q_s的敏感性。我们发现q_p>q_s的情况比$q_p \leq q_s$的情况对布居转移过程更不利。在这种情况下，可以增加介质维数，同时允许有效的布居转移。找到了决定传播过程中相互作用绝热性的判据，并证明了表征布居数转移的混合参数是超光传播的。
Stimulated Raman adiabatic passage in a $Λ$-system in the presence of quantum noise
我们利用一个微观导出的主方程研究STIRAP从辅助能级到初态和终态的衰变，并将我们的结果与以前使用的唯象模型的预测进行比较[P.A.伊万诺夫，N。Vitanov和K. Bergmann，Phys.Rev.A72，053412（2005）]。结果表明，我们的方法预测一个更高的效率。温度的影响也被考虑在内，证明在b-STIRAP热泵可以提高人口转移的效率。
Counter-Intuitive Vacuum-Stimulated Raman Scattering
强耦合原子-腔系统中的受激拉曼散射允许人们根据需要产生自由运行的单光子脉冲。只要自发发射过程不起作用，发射光子的大多数性质都有明确的定义。因此，原子的电子激发一定不会发生，这对于在光子产生过程期间动态地跟随暗态的系统是有保证的。我们实验研究的条件下，必须满足绝热以下的飞行时间驱动系统，通过一个腔和一个泵光束定向横向于腔轴的原子。从我们的结果中，我们推断出最佳的强度和相对泵浦光的位置相对于腔轴。
We use optimal control theory to obtain shortcuts to adiabaticity which maximize population transfer in a three-level STIRAP system, for a given finite duration of the process and specified dissipation rate at the intermediate state. We fix the sum of the intensities of the pump and Stokes pulses and use the mixing angle as the sole control variable. We determine the optimal variation of this angle and reveal the role of singular arc in the optimal trajectory, in order to minimize the effect of dissipation.
Magnetically-controlled velocity selection in a cold atom sample using stimulated Raman transitions
我们观测了在磁场存在下冷原子云中的速度选择性双光子共振。我们使用这些共振演示一个简单的磁强计与次mG分辨率。该技术对于将磁场归零特别有用，并且不需要比已经用于标准磁光阱的任何附加激光频率。我们使用法拉第旋转光谱验证的效果。
Quantum memory for light via stimulated off-resonant Raman process: beyond the three-level Lambda-scheme approximation
我们考虑了一种基于受激非共振拉曼过程将信号脉冲转换为长寿命自旋相干的量子存储方案。对于由碱金属原子组成的存储介质，我们计算了由强控制场产生的Autler-Townes共振结构。通过考虑到上超精细状态的D1光学跃迁，我们显示出重要的偏差，从通常的三能级λ方案近似的预测，我们证明了增强的过程中，特别是失谐的控制。我们估计使用这种配置可以获得的内存效率。
Control of Raman Lasing in the Nonimpulsive Regime
我们探讨相干控制受激喇曼散射在非脉冲制度。相干泵浦场的光脉冲整形导致对受激拉曼输出的控制。控制机制的模型进行了研究。
Theory of Quantum-Enhanced Stimulated Raman Scattering
本文提出基于量子计量学的量子增强受激拉曼散射完整理论，用于评估测量策略并识别最优观测量，确定压缩态最优用法，为逼近精度量子极限奠定基础。
Stimulated Raman process in a scattering medium in application to quantum memory scheme
我们考虑在光密无序原子介质中发生的相干受激拉曼过程，该介质也可以将光非相干地散射到所有向外的方向。拉曼过程中讨论的背景下的量子存储方案，我们指出其物理性质的差异，从一个类似的，但不相同的协议的基础上的电磁感应透明（EIT）的效果。我们表明，拉曼和EIT存储器方案不竞争，但相互补充，他们每个人都有一定的优势，在其适用性的领域。我们包括在我们的考虑分析的瞬态过程与开关控制脉冲关闭或打开，并遵循他们如何修改探测脉冲动态的检索阶段的内存协议。
Stimulated Raman adiabatic passage in an open quantum system: Master equation approach
提出了一种研究三态系统绝热布居转移中环境效应的主方程方法。与非厄米哈密顿方法的系统比较[N. Vitanov和S. Stenholm，Phys.Rev.A { \bf 56}，1463（1997）]表明，在弱耦合极限中，两种处理导致基本相同的结果。相反，在强阻尼限制的预测是完全不同的：特别是在STIRAP计划中的反直觉的序列原来是比预期的更有效。这一点可以用量子芝诺动力学来解释。
Three-dimensional theory of stimulated Raman scattering
我们提出了一个三维的受激拉曼散射（SRS）或超辐射理论。特别是，我们解决如何产生的SRS光束，或斯托克斯光束，辐射的空间和时间属性取决于增益介质的空间属性。麦克斯韦方程的斯托克斯场运营商和原子运营商的解析求解和关联函数的斯托克斯场导出。在分析中，我们确定了一个超辐射的斯托克斯辐射，表现出光束特性的一部分。我们展示了如何在这个光束的强度建立在时间上，并在某个点在很大程度上占主导地位的总斯托克斯辐射的增益介质。我们表明如何SRS取决于几何因素，如菲涅耳数和光学深度，而事实上，这两个因素是唯一的因素描述的相干辐射。
The stimulated Raman adiabatic passage (STIRAP) shows an efficient technique that accurately transfers population between two discrete quantum states with the same parity, in three-level quantum systems based on adiabatic evolution. This technique has widely theoretical and experimental applications in many fields of physics, chemistry, and beyond. Here, we present a generally robust approach to speed up STIRAP with invariant-based shortcut to adiabaticity. By controlling the dynamical process, we inversely design a family of Hamiltonians that can realize fast and accurate population transfer …
Stimulated Raman spectroscopy has become a powerful tool to study the spatiodynamics of molecular bonds with high sensitivity, resolution and speed. However, sensitivity and speed of state-of-the-art stimulated Raman spectroscopy are currently limited by the shot-noise of the light beam probing the Raman process. Here, we demonstrate an enhancement of the sensitivity of continuous-wave stimulated Raman spectroscopy by reducing the quantum noise of the probing light below the shot-noise limit by means of amplitude squeezed states of light. Probing polymer samples with Raman shifts around 2950 $…
Squeezed spin states have important applications in quantum metrology and sensing. It has been shown by Sørensen and Mølmer [Phys. Rev. A 66, 022314(2002)] that an effective one-axis-twisting interaction can be realized in a cavity setup via a double off-resonance stimulated Raman scattering, resulting in a noise reduction scaling $\propto 1/N^{2/3}$ with $N$ being the atom number. Here, we show that, by making an appropriate change of the initial input spin state, it is possible to produce a one-axis-twisting spin squeezing via a \emph{single} off-resonance stimulated Raman scattering, which …
We propose a method to improve the stimulated Raman adiabatic passage (STIRAP) via dissipative quantum dynamics, taking into account the dephasing effects. Fast and robust population transfer can be obtained with the scheme by the designed pulses and detuning, even though the initial state of the system is imperfect. With a concrete three-level system as an example, the influences of the imperfect initial state, variations in the control parameters, and various dissipation effects are discussed in detail. The numerical simulation shows that the scheme is insensitive to moderate fluctuations of…
Two-dimensional UV femtosecond stimulated Raman spectroscopy for molecular polaritons: dark states and beyond
本文提出二维紫外飞秒受激拉曼光谱方法，通过多维投影和微观理论揭示光学腔内分子极化激元与暗态的耦合动力学，使原本不可见的暗态路径和时间尺度得以探测。
Stimulated Raman adiabatic passage into continuum
我们提出了一种技术，它产生几乎完全电离的人口的离散状态耦合到一个连续的双光子跃迁通过一个有损耗的中间状态，其寿命是远远短于相互作用的持续时间。我们表明，使用违反直觉的有序脉冲，如在受激拉曼绝热通道（STIRAP），其中的脉冲耦合的中间状态的连续之前，部分重叠的脉冲耦合的初始和中间状态，大大增加了电离信号，并大大减少了人口损失由于自发发射通过有损状态。然而，对于来自该状态的强自发发射，电离永远不会完成，因为STIRAP所需的暗状态不存在。我们证明，这个缺点几乎可以完全消除通过创建一个激光诱导的连续结构（LICS）嵌入到连续的第三个控制激光的第三个离散状态。这种LICS在连续体中引入了一些一致性，这使得类似STIRAP的人口转移进入连续体。一个高度精确的解析描述和数值结果的高斯脉冲形状。
Mesoscopic entanglement of atomic ensembles through non-resonant stimulated Raman scattering
提出了一种利用非共振受激拉曼散射产生和验证两原子系综介观纠缠的方案。纠缠可以通过直接检测或平衡零差检测来自两个池的斯托克斯场，在它们在分束器上干涉之后产生。在读出过程中，集体原子场的纠缠可以转移到反斯托克斯场。通过测量反斯托克斯光场的算符矩，我们可以验证纠缠的存在。我们模拟的实际因素，如斯托克斯场探测器的量子效率和附加的热噪声在纠缠产生过程中的影响，和反斯托克斯场的损失在纠缠验证过程中，并找到可实现的制度，其中纠缠可以验证在几十到几百个原子激发的合奏。
Generation of atomic entangled states in a bi-mode cavity via adiabatic passage
提出了利用受激拉曼绝热通道（STIRAP）和分数受激拉曼绝热通道（f-STIRAP）技术在双模腔中制备原子纠缠态的方案。根据模拟结果，我们的方案在整个过程中保持了腔模几乎未被激发，原子激发态几乎未布居。仿真结果还表明，该方法的误差概率很小.
We developed single-shot shaped pulses for ultra high fidelity (UH-fidelity) population transfer on a 3-level quantum system in lambda configuration. To ensure high fidelity, we use the Lewis-Riesenfeld (L-R) method to derive a family of solutions leading to an exact transfer, where the solutions follow a single dynamical mode of the L-R invariant. Among this family, we identify a tracking solution with a single parameter to control simultaneously the fidelity of the transfer, the population of the excited state, and robustness. We define a measure of the robustness of an UH-fidelity transfer …
The Stimulated Raman Adiabatic Passage (STIRAP) procedure is a robust and complete population transfer method which have various application in chemistry and atomic physics. Here, we study the effects of one-photon detuning, transition time, pulse width, and pulse delay parameters on the population transfer via STIRAP and b-STIRAP techniques. Moreover, the impact of the field amplitude which decreases the population transfer has been analyzed and it is shown that in b-STIRAP, the robustness of the complete transition can be improved by decreasing the field amplitude in the single-photon resona…
Advanced control with a Cooper-pair box: stimulated Raman adiabatic passage and Fock-state generation in a nanomechanical resonator
在超导纳米电路领域的快速实验进展引起了对这些宏观相干系统的先进量子控制技术的越来越多的追求。在这里，我们从理论上证明，受激拉曼绝热通道（STIRAP）应该是可能的量子设置的库珀对盒。该方案对退相干具有鲁棒性，即使在现有技术下也应该是可实现的。作为应用，我们提出了一种方法，产生单声子态的纳米机械谐振器的真空激励绝热通道与超导纳米电路耦合到谐振器。
Stimulated Raman transitions via multiple atomic levels
我们考虑了碱金属原子中两个长寿命态之间通过多个中间态的受激喇曼跃迁，如超精细基态之间的跃迁。我们提出了一个简明的治疗一般，多层次的，非共振的情况下，我们展示了如何在这种方法中自然出现的光移。我们说明我们的结果应用到碱金属原子，我们具体提到铯。我们评论一些文物，仅仅是由于几何重叠的状态，这是相关的现有实验。
Stimulated X-ray Raman scattering for selective preparation of dark states bypassing optical selection rules
本文提出基于X射线的受激拉曼方法，利用芯层激发态特性突破光学选择定则，实现单重态间及单重态-三重态间禁戒跃迁，从而选择性制备暗态，并在两个分子体系上验证并讨论实验可行性。
We propose the use of stimulated Raman adiabatic passage (STIRAP) to offer a fast high fidelity method of performing SU(2) rotations on spinor Bose Einstein condensates (BEC). Past demonstrations of BEC optical control suffer from difficulties arising from collective enhancement of spontaneous emission and inefficient two-photon transitions originating from selection rules. We present here a novel scheme which allows for arbitrary coherent rotations of two-component BECs while overcoming these issues. Numerical tests of the method show that for BECs of \ce{^{87}Rb} with up to $ 10^4 $ atoms an…
Dephasing effects on stimulated Raman adiabatic passage in tripod configurations
我们给出了三脚架量子系统中退相过程对受激拉曼绝热通过的影响的解析描述。为此，我们开发了一个有效的两级模型。我们的分析利用弱退相区的绝热近似。本文导出了由两个暗态构成的二能级系统的有效主方程，并利用Demkov-Kunike模型得到了解析解。从这些，它被发现的保真度为最终的相干叠加态的失相率增加呈指数下降。取决于脉冲排序和绝热演化，脉冲延迟可以具有相反的效果。
Stimulated adiabatic passage in a dissipative Rydberg superatom
研究了延迟激光脉冲作用下受激绝热过程中原子里德伯态的双光子激发。我们发现，里德伯态原子之间的强相互作用和中间激发态原子的自发衰变的结合导致了原子系综中恰好一个原子的里德伯激发.量子芝诺效应为这一结果提供了一个清晰的解释：里德伯阻挡原子重复散射光子，有效地监测了一个随机激发的原子，因此该原子保持在里德伯态。该系统可用于确定性的创建，并可能，提取里德伯原子或离子一次一个。通过辅助粒子衰变的交感神经监测可能会在耗散多体系统的状态准备和相互作用的探测中找到更广泛的应用。
Entangled Photons Enabled Ultrafast Stimulated Raman Spectroscopy for Molecular Dynamics
本文提出利用纠缠光子实现超快受激拉曼光谱的新方法，通过Hong-Ou-Mandel干涉获得超越经典光的时间-频率分辨率和分子关联函数选择性，用于监测凝聚相分子激子动力学。
We implement high-efficiency coherent excitation to a Rydberg state using stimulated Raman adiabatic passage in a cold atom electron and ion source. We achieve an efficiency of 60% averaged over the laser excitation volume with a peak efficiency of 82%, a 1.6 times improvement relative to incoherent pulsed-laser excitation. Using pulsed electric field ionization of the Rydberg atoms we create electron bunches with durations of 250 ps. High-efficiency excitation will increase source brightness, crucial for ultrafast electron diffraction experiments, and coherent excitation to high-lying Rydberg…
Two-Dimensional Stimulated Resonance Raman Spectroscopy of Molecules with Broadband X-ray Pulses
推导了用阿秒X射线脉冲获得的二维受激X射线拉曼光谱（2D-SXRS）信号的表达式。计算了反式-N-甲基乙酰胺（NMA）的1D和2D-SXRS信号，其宽带宽（FWHM ~14.2eV，181 as）脉冲调谐到氧和氮的K边缘。在2D信号中的串扰揭示了在芯空穴的存在下价轨道和弛豫轨道之间的电子Franck-Condon重叠。
Integrability, stability, and adiabaticity in nonlinear stimulated Raman adiabatic passage
研究了原子与双原子分子通过非线性受激拉曼绝热过程（STIRAP）的双色光缔合动力学。这个系统在（线性）量子力学中有一个著名的对应物，并且最近在将量子绝热定理推广到非线性系统的背景下进行了讨论。在这里，我们使用另一种方法来研究系统的绝热性和稳定性：我们应用经典的哈密顿动力学方法。我们发现了非线性动力学不稳定性，完全可积的情况下，和改进的绝热条件。
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