Skip to Main content Skip to Navigation
Journal articles

Manipulating Fock states of a harmonic oscillator while preserving its linearity

Kristinn Juliusson 1 Simon Bernon 1 Xin Zhou 1 Vivien Schmitt 1 Hélène Le Sueur 2 Patrice Bertet 1 Denis Vion 1 Mazyar Mirahimi 3 Pierre Rouchon 3, 4 Daniel Esteve 1 
1 QUANTRONICS - Quantronics Group
SPEC - UMR3680 - Service de physique de l'état condensé, IRAMIS - Institut Rayonnement Matière de Saclay
3 QUANTIC - QUANTum Information Circuits
ENS-PSL - École normale supérieure - Paris, UPMC - Université Pierre et Marie Curie - Paris 6, MINES ParisTech - École nationale supérieure des mines de Paris, Inria de Paris
Abstract : We present a scheme for controlling the quantum state of a harmonic oscillator by coupling it to an anharmonic multilevel system (MLS) with first- to second-excited-state transition on resonance with the oscillator. In this scheme, which we call ef-resonant, the spurious oscillator Kerr nonlinearity inherited from the MLS is very small, while its Fock states can still be selectively addressed via an MLS transition at a frequency that depends on the number of photons. We implement this concept in a circuit-QED setup with a microwave three-dimensional cavity (the oscillator, with frequency 6.4 GHz and quality factor QO=2×10 6) embedding a frequency tunable transmon qubit (the MLS). We characterize the system spectroscopically and demonstrate selective addressing of Fock states and a Kerr nonlinearity below 350 Hz. At times much longer than the transmon coherence times, a nonlinear cavity response with driving power is also observed and explained.
Document type :
Journal articles
Complete list of metadata

Cited literature [22 references]  Display  Hide  Download
Contributor : François Chaplais Connect in order to contact the contributor
Submitted on : Friday, May 26, 2017 - 11:31:55 PM
Last modification on : Friday, July 8, 2022 - 10:10:21 AM
Long-term archiving on: : Monday, August 28, 2017 - 5:10:42 PM


Files produced by the author(s)



Kristinn Juliusson, Simon Bernon, Xin Zhou, Vivien Schmitt, Hélène Le Sueur, et al.. Manipulating Fock states of a harmonic oscillator while preserving its linearity. Physical Review A, American Physical Society, 2016, 94 (6), pp.063861. ⟨10.1103/PhysRevA.94.063861⟩. ⟨cea-01346391v2⟩



Record views


Files downloads