Characterizing tripartite entropic uncertainty under random telegraph noise

Two‐Qubit Steerability, Nonlocality, and Average Steered Coherence under Classical Dephasing Channels

“…Two ST or OU local noises are considered to be paired with the two qubits in the TNC configuration. The following Hamiltonian is our considered model that governs the current physical system in the mentioned situations [ 47,81 ] $$$$\begin{equation} { H_{ij}(t)=H_i(t) \otimes {\mathbb {1}}_j +{\mathbb {1}}_i \otimes H_j(t)} \end{equation}$$$$where $$ H_{n}(t)\nobreakspace (\text{with}\nobreakspace n=i,j)$$ is the individual sub‐system Hamiltonian of the system written as [ 89 ] $$$$\begin{equation} H_n(t)=E {\mathbb {1}}_{n}+\lambda \Delta _n(t)\sigma ^x \end{equation}$$$$where E denotes the equal energy partitioning, $$\mathbb {1}_n$$ is the 2 × 2 identity matrix, and the qubit‐channel coupling strength and the stochastic parameters in the classical channels are respectively represented by λ and $$\Delta _n(t)$$ (with $$\Delta _n(t)$$ flipping between ±1), while $$\sigma ^x$$ is the x ‐component of Pauli matrices.…”

“…where H n (t) (with n = i, j) is the individual sub-system Hamiltonian of the system written as [89] H n (t…”

Quantum Communication with Polarization-Encoded Qubits under Majorization Monotone Dynamics

“…which shows how the equilibrium value of the discrimination probability depends on the geometry of the initial state. From (20), one can observe that if θ = π/2 and φ = 0, then p(t) = 1 for all t ≥ 0. It proves that the pair of orthogonal states that lie on the x axis is optimal for information encoding…”

“…[11][12][13][14][15][16]. In recent years, non-Markovian effects in open systems have been particularly studied [17][18][19][20]. In this paper, we propose to investigate the impact of majorization monotone dynamics on the quality of quantum state transmission.…”