Exploiting Non-Markovianity for Quantum Control

Daniel M. Reich, Nadav Katz, Christiane P. Koch*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

Quantum technology, exploiting entanglement and the wave nature of matter, relies on the ability to accurately control quantum systems. Quantum control is often compromised by the interaction of the system with its environment since this causes loss of amplitude and phase. However, when the dynamics of the open quantum system is non-Markovian, amplitude and phase flow not only from the system into the environment but also back. Interaction with the environment is then not necessarily detrimental. We show that the back-flow of amplitude and phase can be exploited to carry out quantum control tasks that could not be realized if the system was isolated. The control is facilitated by a few strongly coupled, sufficiently isolated environmental modes. Our paradigmatic example considers a weakly anharmonic ladder with resonant amplitude control only, restricting realizable operations to SO(N). The coupling to the environment, when harnessed with optimization techniques, allows for full SU(N) controllability.

Original languageAmerican English
Article number12430
JournalScientific Reports
Volume5
DOIs
StatePublished - 22 Jul 2015

Bibliographical note

Publisher Copyright:
© 2015, Nature Publishing Group. All rights reserved.

Fingerprint

Dive into the research topics of 'Exploiting Non-Markovianity for Quantum Control'. Together they form a unique fingerprint.

Cite this