4 papers · 1 filter
Two-body control of noiseless subsystems with mixed representations lifts teleportation above the classical fidelity limit
Otavio A. D. Molitor, Sergii Strelchuk, Michał Studziński
Collective noise can leave degrees of freedom unaffected, allowing them to store quantum information. Processing this information also requires physically available logical gates.…
Exponential de Finetti Theorems for Fermionic Gaussian States
Jędrzej Burkat, Michał Studziński, Sergii Strelchuk
We prove an exponential variant of the Gaussian de Finetti theorem: the subsystems of permutation-invariant, free-fermionic Gaussian states are well approximated by convex combinat…
The Power of Power-of-SWAP: Postselected Quantum Computation with the Exchange Interaction
Jędrzej Burkat, Sergii Strelchuk, Michał Studziński
We introduce Exchange Quantum Polynomial Time (XQP) circuits, which comprise quantum computation using only computational basis SPAM and the isotropic Heisenberg exchange interacti…
Port-based teleportation under pure-dephasing decoherence
Rajendra S. Bhati, Michał Studziński, Jarosław K. Korbicz
We study deterministic port based teleportation in the presence of noise affecting both the entangled resource state and the measurement process. We focus on a physically motivated…