Programmable two-qubit gates in capacitively coupled flopping-mode spin qubits

• URL: http://arxiv.org/abs/2003.02137v3
• Date: Wed, 27 May 2020 11:02:30 GMT
• Title: Programmable two-qubit gates in capacitively coupled flopping-mode spin qubits
• Authors: Jorge Cayao, M\'onica Benito, Guido Burkard
• Abstract summary: We show a versatile set of quantum gates between adjacent spin qubits defined in semiconductor quantum dots. We calculate the estimated infidelity of different two-qubit gates in the most immediate possible experimental realizations.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Recent achievements in the field of gate defined semiconductor quantum dots reinforce the concept of a spin-based quantum computer consisting of nodes of locally connected qubits which communicate with each other via superconducting circuit resonator photons. In this work we theoretically demonstrate a versatile set of quantum gates between adjacent spin qubits defined in semiconductor quantum dots situated within the same node of such a spin-based quantum computer. The electric dipole acquired by the spin of an electron that moves across a double quantum dot potential in a magnetic field gradient has enabled strong coupling to resonator photons and low-power spin control. Here we show that this flopping-mode spin qubit also provides with the tunability to program multiple two-qubit gates. Since the capacitive coupling between these qubits brings about additional dephasing, we calculate the estimated infidelity of different two-qubit gates in the most immediate possible experimental realizations.

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