Fast Quantum Gate via Feshbach-Pauli Blocking in a Nanoplasmonic Trap

Krzysztof Jachymski, Zbigniew Idziaszek, Tommaso Calarco
2014 Physical Review Letters  
We propose a simple idea for realizing a quantum gate with two identical fermions in a double well trap via external optical pulses without addressing the atoms individually. The key components of the scheme are Feshbach resonance and Pauli blocking, which decouple unwanted states from the dynamics. As a physical example we study atoms in the presence of a magnetic Feshbach resonance in a nanoplasmonic trap and discuss the constraints on the operation times for realistic parameters, reaching a fidelity above 99.9% within 42μs.
doi:10.1103/physrevlett.112.250502 pmid:25014799 fatcat:d3sschs5lfca7e4syhcu5mptte