Which mechanism causes signal leakage between adjacent superconducting qubits?

💡 Explanation

Quantum tunneling causes leakage because electron pairs can tunnel through the energy barrier between qubits, leading to unwanted entanglement. Therefore, tunneling is the source, rather than issues of superposition or phonon effects which alter readout fidelity under different conditions.

• Which risk arises when measuring entangled photons' polarization?
• Which consequence results when a pulsed laser's external cavity mirrors become misaligned?
• Which consequence results when attempting to measure the spin of one photon entangled with another across a quantum communication channel?
• Which consequence results when exceeding the Curie temperature in ferromagnetic recording media?
• Which risk increases when a Haber-Bosch reactor exceeds its pressure rating?
• Which risk increases when increasing temperature favors gaseous products over reactants in a reversible closed system reaction?