Projekteja vuodessa
Abstrakti
We review the physical phenomena that arise when quantum mechanical energy levels are modulated in time. The dynamics resulting from changes in the transition frequency is a problem studied since the early days of quantum mechanics. It has been of constant interest both experimentally and theoretically since, with the simple twostate model providing an inexhaustible source of novel concepts. When the transition frequency of a quantum system is modulated, several phenomena can be observed, such as LandauZenerStückelbergMajorana interference, motional averaging and narrowing, and the formation of dressed states with the appearance of sidebands in the spectrum. Adiabatic changes result in the accumulation of geometric phases, which can be used to create topological states. In recent years, an exquisite experimental control in the time domain was gained through the parameters entering the Hamiltonian, and highfidelity readout schemes allowed the state of the system to be monitored nondestructively. These developments were made in the field of quantum devices, especially in superconducting qubits, as a well as in atomic physics, in particular in ultracold gases. As a result of these advances, it became possible to demonstrate many of the fundamental effects that arise in a quantum system when its transition frequencies are modulated. The purpose of this review is to present some of these developments, from twostate atoms and harmonic oscillators to multilevel and manyparticle systems.
Alkuperäiskieli  Englanti 

Artikkeli  056002 
Sivut  139 
Julkaisu  Reports on Progress in Physics 
Vuosikerta  80 
Numero  5 
DOI  pysyväislinkit  
Tila  Julkaistu  5 huhtik. 2017 
OKMjulkaisutyyppi  A2 Katsausartikkeli tieteellisessä aikakauslehdessä 
Sormenjälki
Sukella tutkimusaiheisiin 'Quantum systems under frequency modulation'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.Projektit
 2 Päättynyt

COMP: COMP: Laskennallisen nanotieteen huippuyksikkö
Dhar, A., Ollikainen, T., Peotta, S., Törmä, P., Li, J., Todorovic, M., Berseneva, N., Spijker, P., Vanhala, T., Laine, E., Ma, L., Derom, S., Jonsson, E. & Hiltunen, T.
01/01/2015 → 31/12/2017
Projekti: Academy of Finland: Other research funding

Matalien lämpötilojen kvanttiilmiöiden ja komponenttien huippuyksikkö
Golubev, D., Volovik, G., Westström, A., Tuoriniemi, J., Najafi Jabdaraghi, R., Pekola, J., Pöyhönen, K., Singh, S., Feshchenko, A., Kauppila, V., Senior, J., Viisanen, K., Wang, L., Khan, R., Padurariu, C., Lähteenmäki, P. & Ronzani, A.
01/01/2015 → 31/12/2017
Projekti: Academy of Finland: Other research funding