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Fault-Tolerant Quantum Computation for Singlet-Triplet Qubits with Leakage Errors
Sebastian Mehl, Hendrik Bluhm, David P. DiVincenzo
We describe and analyze leakage errors of singlet-triplet qubits. Even though leakage errors are a natural problem for spin qubits encoded using quantum dot arrays, they have obtai…
Inverted Singlet-Triplet Qubit Coded on a Two-Electron Double Quantum Dot
Sebastian Mehl, David P. DiVincenzo
The spin configuration of two electrons confined at a double quantum dot (DQD) encodes the singlet-triplet qubit (STQ). We introduce the inverted STQ (ISTQ) that emerges fr…
Blackbox Quantization of Superconducting Circuits using exact Impedance Synthesis
Firat Solgun, David W. Abraham, David P. DiVincenzo
We propose a new quantization method for superconducting electronic circuits involving a Josephson junction device coupled to a linear microwave environment. The method is based on…
Two-Qubit Couplings of Singlet-Triplet Qubits Mediated by One Quantum State
Sebastian Mehl, Hendrik Bluhm, David P. DiVincenzo
We describe high-fidelity entangling gates between singlet-triplet qubits (STQs) which are coupled via one quantum state (QS). The QS can be provided by a quantum dot itself or by…