# A $\pi$-shaped Quantum Device for Implementation of Bell States in Solid State Environment

## TL;DR

This paper introduces a novel $$-shaped solid-state quantum device that generates and manipulates Bell states using electrically controlled spin-qubits for quantum computing applications.

## Contribution

The paper presents a $$-shaped device capable of creating and measuring Bell states in a solid-state environment, enabling universal quantum gates and interconnects.

## Key findings

- Device successfully generates Bell states electrically.
- Implementation of $U_{\u221a{SWAP}}$ and CNOT gates.
- Potential for integrated quantum circuits.

## Abstract

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.