56 citations · 130 across the 7 of their papers we have counts for
7 papers
Measuring trajectories of environmental noise
Piotr Szańkowski
In classical mechanics, a natural way to simplify a many-body problem is to ``replace'' some of the elements of the composite system with surrogate \textit{force fields}. In the re…
Influence of nuclear spin polarization on spin echo signal of NV center qubit
Damian Kwiatkowski, Piotr Szańkowski, Łukasz Cywiński
We consider the spin echo dynamics of a nitrogen-vacancy center qubit based the ground state spin manifold, caused by a dynamically polarized nuclear environment. We sh…
Transition between continuous and discrete spectra in dynamical-decoupling noise spectroscopy
Piotr Szańkowski
Here, we explore the prospects of carrying out the single qubit spectroscopy of environmental noise when the resolution of the frequency filters produced by the dynamical decouplin…
Decoherence-assisted detection of entanglement of two qubit states
Jan Krzywda, Piotr Szańkowski, Jan Chwedeńczuk +1
We show that the decoherence, which in the long run destroys quantum features of a system, can be used to reveal the entanglement in a two-qubit system. To this end, we consider a…
Accuracy of dynamical-decoupling-based spectroscopy of Gaussian noise
Piotr Szańkowski, Łukasz Cywiński
The fundamental assumption of dynamical decoupling based noise spectroscopy is that the coherence decay rate of qubit (or qubits) driven with a sequence of many pulses, is well app…
Localization of a magnetic moment using a two-qubit probe
Jan Krzywda, Łukasz Cywiński, Piotr Szańkowski
A nanomagnet precessing in an external magnetic field can be treated as a source of narrow-bandwidth magnetic noise, that leaves characteristic fingerprints in decoherence of a nea…
Spectroscopy of cross-correlations of environmental noises with two qubits
Piotr Szańkowski, Marek Trippenbach, Łukasz Cywiński
A single qubit driven by an appropriate sequence of control pulses can serve as a spectrometer of local noise affecting its energy splitting. We show that by driving and observing…