Energetics of a single qubit gate
Qubits are physical, a quantum gate thus not only acts on the information carried by the qubit
but also on its energy. What is then the corresponding flow of energy between the qubit and …
but also on its energy. What is then the corresponding flow of energy between the qubit and …
Beating the 3 db limit for intracavity squeezing and its application to nondemolition qubit readout
While the squeezing of a propagating field can, in principle, be made arbitrarily strong, the
cavity-field squeezing is subject to the well-known 3 dB limit, and thus has limited …
cavity-field squeezing is subject to the well-known 3 dB limit, and thus has limited …
Frequency comb from a single driven nonlinear nanomechanical mode
Phononic frequency combs have attracted increasing attention both as a qualitatively new
type of nonlinear phenomena in vibrational systems and from the point of view of …
type of nonlinear phenomena in vibrational systems and from the point of view of …
Creation of nonclassical states of light in a chiral waveguide
Creating nonclassical states of light from simple quantum systems together with classical
resources is a challenging problem. We show how chiral emitters under a coherent drive …
resources is a challenging problem. We show how chiral emitters under a coherent drive …
Resolving Fock states near the Kerr-free point of a superconducting resonator
We have designed a tunable nonlinear resonator terminated by a SNAIL (Superconducting
Nonlinear Asymmetric Inductive eLement). Such a device possesses a Kerr-free point in …
Nonlinear Asymmetric Inductive eLement). Such a device possesses a Kerr-free point in …
Steady-state heat transport and work with a single artificial atom coupled to a waveguide: Emission without external driving
We observe the continuous emission of photons into a waveguide from a superconducting
qubit without the application of an external drive. To explain this counterintuitive observation …
qubit without the application of an external drive. To explain this counterintuitive observation …
Simple, reliable, and noise-resilient continuous-variable quantum state tomography with convex optimization
I Strandberg - Physical Review Applied, 2022 - APS
Precise reconstruction of unknown quantum states from measurement data, a process
commonly called quantum state tomography, is a crucial component in the development of …
commonly called quantum state tomography, is a crucial component in the development of …
Quantum efficiency, purity and stability of a tunable, narrowband microwave single-photon source
We demonstrate an on-demand source of microwave single photons with 71–99% intrinsic
quantum efficiency. The source is narrowband (300 kHz) and tuneable over a 600 MHz …
quantum efficiency. The source is narrowband (300 kHz) and tuneable over a 600 MHz …
Deterministic loading of microwaves onto an artificial atom using a time-reversed waveform
Loading quantum information deterministically onto a quantum node is an important step
toward a quantum network. Here, we demonstrate that coherent-state microwave photons …
toward a quantum network. Here, we demonstrate that coherent-state microwave photons …
Engineering symmetry-selective couplings of a superconducting artificial molecule to microwave waveguides
Tailoring the decay rate of structured quantum emitters into their environment opens new
avenues for nonlinear quantum optics, collective phenomena, and quantum …
avenues for nonlinear quantum optics, collective phenomena, and quantum …