17357270. Quantum Computing Architecture based on Entangled Fermions simplified abstract (Massachusetts Institute of Technology)

Quantum Computing Architecture based on Entangled Fermions

Organization Name

Massachusetts Institute of Technology

Inventor(s)

Martin Zwierlein of Belmont MA (US)

Thomas Richard Hartke of Cambridge MA (US)

Ningyuan Jia of Cambridge MA (US)

Botond Oreg of Cambridge MA (US)

Quantum Computing Architecture based on Entangled Fermions - A simplified explanation of the abstract

This abstract first appeared for US patent application 17357270 titled 'Quantum Computing Architecture based on Entangled Fermions

The abstract describes a quantum register made up of fermionic atom pairs trapped in an optical lattice, forming qubits with long coherence times and universal control through interactions modulation.

• Hundreds of fermionic atom pairs are trapped in an optical lattice to create a robust quantum register.
• Each fermion pair forms a spin-singlet, creating near-degenerate two-particle wavefunctions for qubits.
• The qubits are insensitive to noise due to the lifting of degeneracy by atomic recoil energy.
• Quantum coherence can last longer than ten seconds, with universal control provided by modulating interactions between atoms.
• Coherent conversion of free atom pairs into tightly bound molecules allows tuning of motional entanglement speed.
• Site-resolved motional state readout is achieved by splitting pairs into constituent fermions via a double-well, creating entangled Bell pairs.

Potential Applications: - Quantum computing - Quantum communication - Quantum cryptography

Problems Solved: - Maintaining long quantum coherence times - Providing universal control over qubits - Achieving site-resolved motional state readout

Benefits: - Long quantum coherence times - Universal control over qubits - High precision in motional state readout

Commercial Applications: Title: Quantum Computing Advancement with Fermionic Atom Pairs This technology could revolutionize quantum computing by providing stable and controllable qubits with long coherence times, opening up new possibilities for complex calculations and secure communications.

Questions about Quantum Computing with Fermionic Atom Pairs: 1. How does the use of fermionic atom pairs improve quantum computing capabilities? 2. What are the potential limitations of this technology in practical quantum computing applications?

Original Abstract Submitted

Fermions are the building blocks of matter. Here, we disclose a robust quantum register composed of hundreds of fermionic atom pairs trapped in an optical lattice. With each fermion pair forming a spin-singlet, the qubit is realized as a set of near-degenerate, symmetry-protected two-particle wavefunctions describing common and relative motion. Degeneracy is lifted by the atomic recoil energy, which depends on mass and lattice wavelength, thereby rendering two-fermion motional qubits insensitive to noise of the confining potential. The quantum coherence can last longer than ten seconds. Universal control is provided by modulating interactions between the atoms. Via state-dependent, coherent conversion of free atom pairs into tightly bound molecules, we tune the speed of motional entanglement over three orders of magnitude, yielding 10Ramsey oscillations within the coherence time. For site-resolved motional state readout, pairs are coherently split into their constituent fermions via a double-well, creating entangled Bell pairs.