Fast quantum gate via Feshbach-Pauli blocking in a nanoplasmonic trap

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2014-06-25 - 2014-11-27

K. Jachymski, Z. Idziaszek, T. Calarco


DOI: 10.1103/PhysRevLett.112.250502
Journal reference: Phys. Rev. Lett. 112, 250502 (2014)

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 µs