Decoherence of Coupled Flip-Flop Qubits Due to Charge Noise

Abstract

We study the decoherence effect of charge noise on a single flip-flop qubit and two dipole-coupled qubits. We find that a single flip-flop qubit is highly resistant to charge noise at its sweet spots. However, due to the proximity of the charge excited states to the flip-flop logical states, the presence of charge noise greatly reduces the fidelity of two-qubit operations. We identify leakage from the qubit Hilbert space as the main culprit for the reduced gate fidelity. We also explore different bias conditions to mitigate this decoherence channel.

arXiv comment20 pages, 12 figures

References in corpus (19)

• The Physical Implementation of Quantum Computation
• An addressable quantum dot qubit with fault-tolerant control fidelity
• Coherent manipulation of electronic states in a double quantum dot
• Electron spin coherence exceeding seconds in high purity silicon
• 1/f noise: implications for solid-state quantum information
• Quantum Coherence in a One-Electron Semiconductor Charge Qubit
• Scalable gate architecture for densely packed semiconductor spin qubits
• Charge fluctuation induced dephasing of exchange coupled spin qubits
• A high-sensitivity gate-based charge sensor in silicon
• Tunable spin-selective loading of a silicon spin qubit
• Low-frequency charge noise in Si/SiGe quantum dots
• Measurement of the Spin Relaxation Time of Single Electrons in a Silicon MOS-Based Quantum Dot
• Charge decoherence in laterally coupled quantum dots due to electron-phonon interactions
• Extending the coherence of a quantum dot hybrid qubit
• Single-shot readout and relaxation of singlet/triplet states in exchange-coupled ${}^{31}$P electron spins in silicon
• Spin Relaxation due to Charge Noise
• Gate induced g-factor control and dimensional transition for donors in multi-valley semiconductors
• Hyperfine interaction induced dephasing of coupled spin qubits in semiconductor double quantum dots
• Spin relaxation of a donor electron coupled to interface states

Cited by in corpus (2)

• Dynamical second-order noise sweetspots in resonantly driven spin qubits
• Influence of Random Telegraph Noise on Quantum Bit Gate Operation