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Photonics 2016, 3(4), 62; doi:10.3390/photonics3040062

Quantum Control in Qutrit Systems Using Hybrid Rabi-STIRAP Pulses

1
Low Temperature Laboratory, Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, FI-00076 Aalto, Finland
2
Dipartimento di Fisica e Astronomia, Università di Catania, Via Santa Sofia 64, 95123 Catania, Italy
3
CNR-IMM UOS Università (MATIS), Consiglio Nazionale delle Ricerche, Via Santa Sofia 64, 95123 Catania, Italy
4
INFN, Sezione di Catania, Via Santa Sofia 64, 95123 Catania, Italy
*
Author to whom correspondence should be addressed.
Received: 22 October 2016 / Revised: 16 November 2016 / Accepted: 22 November 2016 / Published: 26 November 2016
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Abstract

We introduce and analyze theoretically a procedure that combines slow adiabatic stimulated Raman adiabatic passage (STIRAP) manipulation with short nonadiabatic Rabi pulses to produce any desired three-level state in a qutrit system. In this protocol, the fast pulses create superpositions between the ground state and the first excited state, while the slow pulses transfer an arbitrary population to the second excited state via STIRAP. We demonstrate high-fidelity quantum control of the level populations and phases and we characterize the errors incurred under the breakdown of adiabaticity. In a configuration where an ancillary state is available, we show how to realize a nondemolition monitoring of the relative phases. These methods are general and can be implemented on any experimental platform where a quantum system with at least three accessible energy levels is available. We discuss here in detail experimental implementations in circuit quantum electrodynamics (QED) based on the results obtained with a transmon, where the control of population using the hybrid Rabi-STIRAP sequence has been achieved. View Full-Text
Keywords: quantum computing; superconducting qubits; stimulated Raman adiabatic passage; nonadiabaticity; quantum control; quantum gates; Josephson junctions quantum computing; superconducting qubits; stimulated Raman adiabatic passage; nonadiabaticity; quantum control; quantum gates; Josephson junctions
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Vepsäläinen, A.; Danilin, S.; Paladino, E.; Falci, G.; Paraoanu, G.S. Quantum Control in Qutrit Systems Using Hybrid Rabi-STIRAP Pulses. Photonics 2016, 3, 62.

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