143 citations · 501 across the 13 of their papers we have counts for
13 papers
Multipartite entanglement in a microwave frequency comb
Shan W. Jolin, Gustav Andersson, J. C. Rivera Hernández +6
Significant progress has been made with multipartite entanglement of discrete qubits, but continuous variable systems may provide a more scalable path toward entanglement of large…
Robust preparation of Wigner-negative states with optimized SNAP-displacement sequences
Marina Kudra, Mikael Kervinen, Ingrid Strandberg +13
Hosting non-classical states of light in three-dimensional microwave cavities has emerged as a promising paradigm for continuous-variable quantum information processing. Here we ex…
Performance of teleportation-based error correction circuits for bosonic codes with noisy measurements
Timo Hillmann, Fernando Quijandría, Arne L. Grimsmo +1
Bosonic quantum error-correcting codes offer a viable direction towards reducing the hardware overhead required for fault-tolerant quantum information processing. A broad class of…
Designing Kerr Interactions for Quantum Information Processing via Counterrotating Terms of Asymmetric Josephson-Junction Loops
Timo Hillmann, Fernando Quijandría
Continuous-variable systems realized in high-coherence microwave cavities are a promising platform for quantum information processing. While strong dynamic nonlinear interactions a…
Wigner negativity in the steady-state output of a Kerr parametric oscillator
Ingrid Strandberg, Göran Johansson, Fernando Quijandría
The output field from a continuously driven linear parametric oscillator may exhibit considerably more squeezing than the intracavity field. Inspired by this fact, we explore the n…
Gaussian conversion protocols for cubic phase state generation
Yu Zheng, Oliver Hahn, Pascal Stadler +4
Universal quantum computing with continuous variables requires non-Gaussian resources, in addition to a Gaussian set of operations. A known resource enabling universal quantum comp…
Numerical study of Wigner negativity in one-dimensional steady-state resonance fluorescence
Ingrid Strandberg, Yong Lu, Fernando Quijandría +1
In a numerical study, we investigate the steady-state generation of nonclassical states of light from a coherently driven two-level atom in a one-dimensional waveguide. Specificall…
Observation of Three-Photon Spontaneous Parametric Downconversion in a Superconducting Parametric Cavity
C. W. Sandbo Chang, Carlos Sabín, P. Forn-Díaz +5
Spontaneous parametric downconversion (SPDC) has been a key enabling technology in exploring quantum phenomena and their applications for decades. For instance, traditional SPDC, w…
Generating Multimode Entangled Microwaves with a Superconducting Parametric Cavity
C. W. Sandbo Chang, M. Simoen, José Aumentado +7
In this Letter, we demonstrate the generation of multimode entangled states of propagating microwaves. The entangled states are generated by parametrically pumping a multimode supe…
Continuous matrix product states solution for the mixing/demixing transition in one-dimensional quantum fields
Fernando Quijandría, David Zueco
We solve the mixing-demixing transition in repulsive one-dimensional bose-bose mixtures. This is done numerically by means of the continuous matrix product states variational ansat…
Stationary discrete solitons in circuit QED
Uta Naether, Fernando Quijandría, Juan José García-Ripoll +1
We demonstrate that stationary localized solutions (discrete solitons) exist in a one dimensional Bose-Hubbard lattices with gain and loss in the semiclassical regime. Stationary s…
Continuous matrix product states for coupled fields: Application to Luttinger Liquids and quantum simulators
Fernando Quijandría, Juan José García-Ripoll, David Zueco
A way of constructing continuous matrix product states (cMPS) for coupled fields is presented here. The cMPS is a variational \emph{ansatz} for the ground state of quantum field th…
The Bose Hubbard model with squeezed dissipation
Fernando Quijandría, Uta Naether, Diego Porras +2
The stationary properties of the Bose-Hubbard model under squeezed dissipation are investigated. The dissipative model does not possess a symmetry, but parity is conserved:…