Quantum Computing Architecture based on Entangled Fermions

Smart overview of the Invention

A quantum register is developed using pairs of fermionic atoms trapped in an optical lattice, creating a stable environment for quantum information storage and manipulation. Each pair of fermions exists in a spin-singlet state, allowing the realization of qubits through their unique wavefunctions that describe both common and relative motion. The design ensures that the qubits are robust against external noise, thanks to the lifting of degeneracy by atomic recoil energy, which is influenced by the mass of the atoms and the lattice wavelength.

Enhanced Stability through Fermionic Properties

Utilizing the Pauli exclusion principle, the architecture maintains a high level of stability in quantum information processing. By ensuring that no two fermions occupy the same quantum state, the system minimizes leakage into unwanted channels. The qubit subspace is structured to significantly reduce sensitivity to magnetic field fluctuations, allowing for longer coherence times exceeding ten seconds, which is crucial for reliable quantum computations.

Quantum State Manipulation Techniques

The technology allows for universal control over the fermion pairs by modulating interactions between them. This includes the ability to coherently convert free atom pairs into tightly bound molecules, facilitating rapid entanglement processes. The system can achieve extensive Ramsey oscillations within the coherence time, enabling efficient manipulation of quantum states across multiple pairs simultaneously.

Implementation and Readout Mechanisms

The qubit implementation involves trapping fermionic pairs in elongated harmonic potential wells formed within an optical lattice. The energy levels of these states are strategically designed to ensure independence from fluctuations in laser intensity. For readout, pairs can be split into individual fermions using a double-well configuration, allowing for site-resolved imaging and measurement of their motional states through fluorescence techniques.

Potential Applications and Future Directions

This innovative approach to quantum computing leverages the unique properties of fermions to create a highly stable and efficient architecture for quantum information processing. The potential applications span various fields including quantum simulation, cryptography, and complex system modeling. Continued research may further enhance control techniques and expand the scalability of this quantum computing platform.