From the 1 of 5 linked papers with an AI index.
5 papers
Higher-order covariance matrices for non-Gaussian quantum states
VojtÄch Kala, Petr Marek, Nicolas J. Cerf
The paper introduces higher-order covariance matrices built from quadrature monomials to characterize non‑Gaussian continuous‑variable quantum states, showing how they transform un…
Witnesses of non-Gaussian features as lower bounds of stellar rank
Jan ProvaznÃk, Å imon Bräuer, VojtÄch Kala +2
Quantum non-Gaussian states and operations serve as fundamental resources for universal quantum computation, error correction, and high-precision metrology, extending beyond the Ga…
Nullifiers of non-Gaussian cluster states through homodyne measurement
VojtÄch Kala, Casper A. Breum, Mikkel V. Larsen +4
In continuous variable optical platforms, large-scale Gaussian cluster states have already been demonstrated, but non-Gaussian resources are essential to achieve universality and f…
Genuine Continuous Quantumness
VojtÄch Kala, JiÅà Fadrný, Michal Neset +3
Randomness is a key feature of quantum physics. Heisenberg's uncertainty principle reveals the existence of an intrinsic noise, usually explored through Gaussian squeezed states. D…
Nonlinear squeezing generation via multimode PDC and single photon measurement
VojtÄch Kala, Denis Kopylov, Petr Marek +1
Nonlinear squeezing is a property of non-Gaussian states of light with an important application in continuous variable quantum computing. We study the generation of nonlinear squee…