Landau-Zener-Stueckelberg interferometry with driving fields in the quantum regime

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We analyze the dynamics of a two-level quantum system (TLS) under the influence of a strong sinusoidal driving signal whose origin is the interaction of the two-level system with a quantum field. In this approach the driving field is replaced by a harmonic oscillator that is either strongly coupled to the TLS or populated with a large number of photons. Starting from the Rabi model, we derive expressions for the TLS's oscillation frequencies and compare the results with those obtained from the model where the driving signal is treated classically. We show that in the limits of weak coupling and large photon number, the well-known expression for the Rabi frequency in the strong driving regime is recovered. In the opposite limit of strong coupling and small photon number, we find differences between the predictions of the semiclassical and quantum models. The results of the quantum picture can therefore be understood as Landau-Zener-Stueckelberg interferometry in the fully quantum regime.

Original languageEnglish
Article number134002
JournalJournal of Physics A: Mathematical and Theoretical
Volume50
Issue number13
DOIs
Publication statusPublished - 3 Mar 2017

Fingerprint

Interferometry
interferometry
Photon
Photons
Quantum Systems
photons
Quantum Fields
Weak Coupling
Strong Coupling
Harmonic Oscillator
harmonic oscillators
Model
Oscillation
oscillations
Prediction
predictions
Interaction
interactions

Keywords

  • dressed states
  • Landau-Zener-Stueckelberg interferometry
  • Rabi model

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Modelling and Simulation
  • Mathematical Physics
  • Physics and Astronomy(all)

Cite this

Landau-Zener-Stueckelberg interferometry with driving fields in the quantum regime. / Ashhab, Sahel.

In: Journal of Physics A: Mathematical and Theoretical, Vol. 50, No. 13, 134002, 03.03.2017.

Research output: Contribution to journalArticle

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