  Electronic spin-qubit is key ingredient for quantum information processing in
a solid state environment. We present a $\pi$-shaped two-qubit entanglement
device capable of measuring the resultant states in Bell basis. In our device,
source spins ($\uparrow_s$ or $\downarrow_s$) are electrically generated and
tunnelled to channel where they interact with channel spins ($\uparrow_c$ or
$\downarrow_c$) via exchange interaction which is responsible for 2-qubit
entanglement. Electrical control over spins gives rise to the Bell states. The
$U_{\sqrt{SWAP}}$ and CNOT gate operations are implemented through these Bell
states for universal quantum computation. $\pi$-shaped quantum device can be
used as a solid state interconnect between different parts of the circuit in
integrated chips.
