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Related Experiment Video

Updated: Apr 10, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

High-fidelity collisional quantum gates with fermionic atoms.

Petar Bojović^1,2, Timon Hilker^1,2,3, Si Wang^1,2

¹Max-Planck-Institut für Quantenoptik, Garching, Germany.

|April 8, 2026

Summary

This summary is machine-generated.

Researchers developed high-fidelity entangling gates for fermionic atoms using controlled collisions in optical lattices. This breakthrough enables robust quantum simulations and advances the development of digital quantum computers for complex chemistry problems.

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Area of Science:

Quantum Computing
Atomic Physics
Quantum Simulation

Background:

Quantum simulations are key for understanding electronic structure and quantum phases.
Neutral-atom platforms offer scalable architectures for quantum computation.
Fermionic encodings are crucial for accurate quantum simulations, but require high-fidelity gates.

Purpose of the Study:

To demonstrate high-fidelity, motionally coherent entangling gates for fermionic atoms.
To unify analogue and digital quantum simulation capabilities on neutral-atom platforms.
To advance the development of programmable fermionic quantum processors.

Main Methods:

Utilized controlled interactions of fermionic atoms in an optical superlattice.
Employed quantum gas microscopy for microscopic characterization of gates.
Implemented spin-exchange and pair-tunnelling gates, including a composite pair-exchange gate.

Main Results:

Achieved collisional entangling gate fidelities up to 99.75(6)%.
Demonstrated Bell-state lifetimes exceeding 10 seconds.
Characterized spin-exchange and pair-tunnelling gates, realizing a robust composite gate.

Conclusions:

Controlled collisions in optical lattices provide a competitive route to high entangling gate fidelities.
This method is intrinsically suited for fermionic statistics, crucial for many-qubit systems.
The demonstrated gates are a significant step towards digital fermionic quantum computers and hybrid simulators.