Atomtronics deals with matter-wave circuits of ultracold atoms manipulated through magnetic or laser-generated guides with different shapes and intensities. In this way, new types of quantum networks can be constructed in which coherent fluids are controlled with the know-how developed in the atomic and molecular physics community. In particular, quantum devices with enhanced precision, control, and flexibility of their operating conditions can be accessed. Concomitantly, new quantum simulators and emulators harnessing on the coherent current flows can also be developed. Here, the authors survey the landscape of atomtronics-enabled quantum technology and draw a roadmap for the field in the near future. The authors review some of the latest progress achieved in matter-wave circuits{\textquoteright} design and atom-chips. Atomtronic networks are deployed as promising platforms for probing many-body physics with a new angle and a new twist. The latter can be done at the level of both equilibrium and nonequilibrium situations. Numerous relevant problems in mesoscopic physics, such as persistent currents and quantum transport in circuits of fermionic or bosonic atoms, are studied through a new lens. The authors summarize some of the atomtronics quantum devices and sensors. Finally, the authors discuss alkali-earth and Rydberg atoms as potential platforms for the realization of atomtronic circuits with special features.

}, doi = {10.1116/5.0026178}, url = {https://doi.org/10.1116/5.0026178}, author = {L. Amico and M. Boshier and G. Birkl and A. Minguzzi and C. Miniatura and L.-C. Kwek and D. Aghamalyan and V. Ahufinger and D. Anderson and N. Andrei and A. S. Arnold and M. Baker and T. A. Bell and T. Bland and J. P. Brantut and D. Cassettari and W. J. Chetcuti and F. Chevy and R. Citro and S. De Palo and R. Dumke and M. Edwards and R. Folman and J. Fortagh and S. A. Gardiner and B. M. Garraway and G. Gauthier and A. G{\"u}nther and T. Haug and C. Hufnagel and M. Keil and P. Ireland and M. Lebrat and W. Li and L. Longchambon and J. Mompart and O. Morsch and P. Naldesi and T. W. Neely and M. Olshanii and E. Orignac and S. Pandey and A. P{\'e}rez-Obiol and H. Perrin and L. Piroli and J. Polo and A. L. Pritchard and N. P. Proukakis and C. Rylands and H. Rubinsztein-Dunlop and F. Scazza and S. Stringari and F. Tosto and A. Trombettoni and N. Victorin and W. von Klitzing and D. Wilkowski and K. Xhani and A. Yakimenko} } @article {308, title = {Roadmap on STIRAP applications}, journal = {Journal of Physics B: Atomic, Molecular and Optical Physics}, volume = {52}, number = {20}, year = {2019}, month = {sep}, pages = {202001}, abstract = {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 {PhysRevLett.98.023003, title = {Trapped Ion Chain as a Neural Network: Error Resistant Quantum Computation}, journal = {Phys. Rev. Lett.}, volume = {98}, year = {2007}, month = {Jan}, pages = {023003}, publisher = {American Physical Society}, abstract = {We demonstrate the possibility of realizing a neural network in a chain of trapped ions with induced long range interactions. Such models permit one to store information distributed over the whole system. The storage capacity of such a network, which depends on the phonon spectrum of the system, can be controlled by changing the external trapping potential. We analyze the implementation of error resistant universal quantum information processing in such systems.}, doi = {10.1103/PhysRevLett.98.023003}, url = {http://link.aps.org/doi/10.1103/PhysRevLett.98.023003}, author = {M. Pons and V. Ahufinger and C. Wunderlich and A. Sanpera and S. Braungardt and A. Sen(De) and U. Sen and M. Lewenstein} }