STIRAP (stimulated Raman adiabatic passage) is a powerful laser-based method, usually involving two photons, for efficient and selective transfer of populations between quantum states. A particularly interesting feature is the fact that the coupling between the initial and the final quantum states is via an intermediate state, even though the lifetime of the latter can be much shorter than the interaction time with the laser radiation. Nevertheless, spontaneous emission from the intermediate state is prevented by quantum interference. Maintaining the coherence between the initial and final state throughout the transfer process is crucial. STIRAP was initially developed with applications in chemical dynamics in mind. That is why the original paper of 1990 was published in The Journal of Chemical Physics. However, from about the year 2000, the unique capabilities of STIRAP and its robustness with respect to small variations in some experimental parameters stimulated many researchers to apply the scheme to a variety of other fields of physics. The successes of these efforts are documented in this collection of articles. In Part A the experimental success of STIRAP in manipulating or controlling molecules, photons, ions or even quantum systems in a solid-state environment is documented. After a brief introduction to the basic physics of STIRAP, the central role of the method in the formation of ultracold molecules is discussed, followed by a presentation of how precision experiments (measurement of the upper limit of the electric dipole moment of the electron or detecting the consequences of parity violation in chiral molecules) or chemical dynamics studies at ultralow temperatures benefit from STIRAP. Next comes the STIRAP-based control of photons in cavities followed by a group of three contributions which highlight the potential of the STIRAP concept in classical physics by presenting data on the transfer of waves (photonic, magnonic and phononic) between respective waveguides. The works on ions or ion strings discuss options for applications, e.g. in quantum information. Finally, the success of STIRAP in the controlled manipulation of quantum states in solid-state systems, which are usually hostile towards coherent processes, is presented, dealing with data storage in rare-earth ion doped crystals and in nitrogen vacancy (NV) centers or even in superconducting quantum circuits. The works on ions and those involving solid-state systems emphasize the relevance of the results for quantum information protocols. Part B deals with theoretical work, including further concepts relevant to quantum information or invoking STIRAP for the manipulation of matter waves. The subsequent articles discuss the experiments underway to demonstrate the potential of STIRAP for populating otherwise inaccessible high-lying Rydberg states of molecules, or controlling and cooling the translational motion of particles in a molecular beam or the polarization of angular-momentum states. The series of articles concludes with a more speculative application of STIRAP in nuclear physics, which, if suitable radiation fields become available, could lead to spectacular results.

}, doi = {10.1088/1361-6455/ab3995}, url = {https://doi.org/10.1088\%2F1361-6455\%2Fab3995}, author = {K. Bergmann and H. C. N{\"a}gerl and C. Panda and G. Gabrielse and E. Miloglyadov and M. Quack and G. Seyfang and G. Wichmann and S. Ospelkaus and A. Kuhn and S. Longhi and A. Szameit and P. Pirro and B. Hillebrands and X.-F. Zhu and J. Zhu and M. Drewsen and W. K. Hensinger and S. Weidt and T. Halfmann and H.-L. Wang and G. Sorin Paraoanu and N. V. Vitanov and J. Mompart and T. Busch and T. J. Barnum and D. D. Grimes and R. W. Field and M. G. Raizen and E. Narevicius and M. Auzinsh and D. Budker and A. P{\'a}lffy and C. H. Keitel} } @article {248, title = {Optimal conditions for spatial adiabatic passage of a Bose-Einstein condensate}, journal = {Phys. Rev. A}, volume = {94}, number = {5}, year = {2016}, month = {NOV 8}, type = {Article}, abstract = {We investigate spatial adiabatic passage of a Bose-Einstein condensate in a triple-well potential within the three-mode approximation. By rewriting the dynamics in the so-called time-dependent dark-dressed basis, we analytically derive the optimal conditions for the nonlinear parameter and the on-site energies of each well to achieve a highly efficient condensate transport. We show that the nonlinearity yields a high-efficiency plateau for the condensate transport as a function of the on-site energy difference between the outermost wells, favoring the robustness of the transport. We also analyze the case of different nonlinearities in each well, which, for certain parameter values, leads to an increase of the width of this plateau.

}, issn = {2469-9926}, doi = {10.1103/PhysRevA.94.053606}, author = {J. L. Rubio and V. Ahufinger and T. Busch and J. Mompart} } @article {244, title = {Spatial adiabatic passage: a review of recent progress}, journal = {Reports on Progress in Physics}, volume = {79}, year = {2016}, chapter = {074401}, abstract = {Adiabatic techniques are known to allow for engineering quantum states with high fidelity. This requirement is currently of large interest, as applications in quantum information require the preparation and manipulation of quantum states with minimal errors. Here we review recent progress on developing techniques for the preparation of spatial states through adiabatic passage, particularly focusing on three state systems. These techniques can be applied to matter waves in external potentials, such as cold atoms or electrons, and to classical waves in waveguides, such as light or sound

}, url = {http://stacks.iop.org/0034-4885/79/i=7/a=074401}, author = {R. Menchon-Enrich and A. Benseny and V. Ahufinger and A. D. Greentree and T. Busch and J. Mompart} } @article {1367-2630-18-1-015010, title = {Transport of ultracold atoms between concentric traps via spatial adiabatic passage}, journal = {New Journal of Physics}, volume = {18}, number = {1}, year = {2016}, pages = {015010}, abstract = {Spatial adiabatic passage processes for ultracold atoms trapped in tunnel-coupled cylindrically symmetric concentric potentials are investigated. Specifically, we discuss the matter-wave analog of the rapid adiabatic passage (RAP) technique for a high fidelity and robust loading of a single atom into a harmonic ring potential from a harmonic trap, and for its transport between two concentric rings. We also consider a system of three concentric rings and investigate the transport of a single atom between the innermost and the outermost rings making use of the matter-wave analog of the stimulated Raman adiabatic passage (STIRAP) technique. We describe the RAP-like and STIRAP-like dynamics by means of a two- and a three-state model, respectively, obtaining good agreement with the numerical simulations of the corresponding two-dimensional Schr{\"o}dinger equation.

}, url = {http://stacks.iop.org/1367-2630/18/i=1/a=015010}, author = {J. Polo and A. Benseny and T. Busch and V. Ahufinger and J. Mompart} } @article {98, title = {Single-atom interferometer based on two-dimensional spatial adiabatic passage}, journal = {Physical Review A}, volume = {89}, number = {5}, year = {2014}, month = {05/2014}, chapter = {053611}, abstract = {In this work, we propose a single-atom interferometer based on a fully two-dimensional spatial adiabatic passage process using a system of three identical harmonic traps in a triangular geometry. While the transfer of a single atom from the ground state of one trap to the ground state of the most distant one can successfully be achieved in a robust way for a broad range of parameter values, we point out the existence of a specific geometrical configuration of the traps for which a crossing of two energy eigenvalues occurs and the transfer of the atom fails. Instead, the wave function is robustly split into a coherent superposition between two of the traps. We show that this process can be used to construct a single-atom interferometer and discuss its performance in terms of the final population distribution among the asymptotic eigenstates of the individual traps. This interferometric scheme could be used to study space-dependent fields from ultrashort to relatively large distances, or the decay of the coherence of superposition states as a function of the distance.}, doi = {10.1103/PhysRevA.89.053611}, url = {http://dx.doi.org/10.1103/PhysRevA.89.053611}, author = {R. Menchon-Enrich and S. McEndoo and T. Busch and V. Ahufinger and J. Mompart} } @article {100, title = {Tunneling-induced angular momentum for single cold atoms}, journal = {Physical Review A}, volume = {89}, number = {1}, year = {2014}, month = {01/2014}, chapter = {013626}, abstract = {We study the generation of angular momentum carrying states for a single cold particle by breaking the symmetry of a spatial adiabatic passage process in a two-dimensional system consisting of three harmonic potential wells. By following a superposition of two eigenstates of the system, a single cold particle is completely transferred to the degenerate first excited states of the final trap, which are resonantly coupled via tunneling to the ground states of the initial and middle traps. Depending on the total time of the process, angular momentum is generated in the final trap, with values that oscillate between +/-(h) over bar. This process is discussed in terms of the asymptotic eigenstates of the individual wells and the results are checked by simulations of the full twodimensional Schrodinger equation.}, doi = {10.1103/PhysRevA.89.013626}, url = {http://dx.doi.org/10.1103/PhysRevA.89.013626}, author = {R. Menchon-Enrich and S. McEndoo and J. Mompart and V. Ahufinger and T. Busch} }