Shayan Roofeh

collaborators

3 papers

quant-ph2026

Construction of channels which in every dimension anti-degrade the depolarizing channel

Shayan Roofeh, Vahid Karimipour

We consider the depolarizing channel in $d$ dimension defined as $D_{x} (I ¨ ) = (1 - x) I ¨ + x tr (I ¨ ) \frac{I}{d}$ , and explicitly find a quantum channel $N_{x}$ which anti-de…

quant-ph2025

Exact Quantum Capacity of Decohering Channels in Arbitrary Dimensions

Shayan Roofeh, Vahid Karimipour

We derive exact analytical expressions for the quantum capacity of a broad subclasses of generalized dephasing channels of the form $I^ (I ¨ ) = (1 - x) I ¨ + x D (I ¨ )$ , where $D (I ¨ )$ represe…

quant-ph2025

Capacities of a two-parameter family of noisy Werner-Holevo channels

Shayan Roofeh, Vahid Karimipour

In $d = 2 j + 1$ dimensions, the Landau-Streater quantum channel is defined on the basis of spin $j$ representation of the $s u (2)$ algebra. Only for $j = 1$ , this channel is equivalent to…