Aug 2026· Quantum Information Processing· Vol 25· 0 citations· 53 references
Abstract
Quantum Fisher Information (QFI), which sets the fundamental bound on parameter estimation precision via the quantum Cramér-Rao inequality, is investigated for a general single-mode Gaussian state before and after teleportation. Using a two-mode squeezed vacuum state as a shared entanglement resource between Alice and Bob, we analyze the teleportation protocol under environmental noise, focusing on diffusion and dissipation induced by a thermal bath. By comparing QFI for several parameters of the input state before and after teleportation, we evaluate the effectiveness of QFI transfer. We find that increasing the squeezing of the shared state enhances QFI preservation. Notably, under certain conditions, environmental interactions can help maintain QFI, particularly for shared states with high frequency, suggesting a subtle interplay between system dynamics and decoherence.
We propose a teleportation protocol for the faithful transfer of an arbitrary single-qubit state in noisy environment among three spatially separated parties using a 3-qubit GHZ state as the quantum channel. The performance of the protocol is systematically analyzed under the influence of various noise channels using t...
Vedhanayagi R, Basherrudin Mahmud Ahmed A, Alok Sharan· Women in Optics and Photonic...· 0 citations
Typical measurement setups in quantum systems are destructive, meaning that states are irretrievably altered after measurement. In this work, we analyse non-destructive discrimination of two two-mode squeezed vacuum states using local Gaussian measurements. We investigate a tradeoff relation between the success probabi...
Mi-Jung So, James Moran, Youngrong Lim et al.· 0 citations
We consider quantum teleportation channels in which a phase
$$\varphi$$
is imprinted onto the initial shared resource channel. The resource qudits interact with either two independent local environments or a common environment; we classify the noise as
symmetric
when the noise parameters on the two qudits a...
B. Farajollahi, Rosario Lo Franco, Hossein Rangani Jahromi· Scientific Reports· 0 citations
It is shown that quantum correlations embodied through the proposed imaginarity steering inequality (ISI) can be witnessed by suitably constructed Hermitian operators that depend on fewer state parameters and require measurement of fewer observables than for witnessing other forms of quantum non-local correlations.
Shounak Datta, Archan S. Majumdar· Proceedings of the Royal Soc...· 2 citations
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