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Cavity-Mediated Entanglement of Parametrically Driven Spin Qubits via Sidebands
- westurner 2y agoFrom "Cavity-Mediated Entanglement of Parametrically Driven Spin Qubits via Sidebands" (2024) https://journals.aps.org/prxquantum/abstract/10.1103/PRXQuantum.5.020339 https://journals.aps.org/prxquantum/abstract/10.1103/PRXQuan... : > We show that the sidebands generated via the driving fields enable highly tunable qubit-qubit entanglement using only ac control and without requiring the qubit and cavity frequencies to be tuned into simultaneous resonance. The model we derive can be mapped to a variety of qubit types, including detuning-driven one-electron spin qubits in double quantum dots and three-electron resonant exchange qubits in triple quantum dots. The high degree of nonlinearity inherent in spin qubits renders these systems particularly favorable for parametric drive-activated entanglement.
- westurner 2y ago- Article: "Radical quantum computing theory could lead to more powerful machines than previously imagined" https://www.livescience.com/technology/computing/radical-quantum-computing-theory-could-lead-to-more-powerful-machines-than-previously-imagined https://www.livescience.com/technology/computing/radical-qua... : > Each qubit operates in a given frequency. > These qubits can then be stitched together through quantum entanglement — where their data is linked across vast separations over time or space — to process calculations in parallel. The more qubits are entangled, the more exponentially powerful a quantum computer will become. > Entangled qubits must share the same frequency. But the study proposes giving them "extra" operating frequencies so they can resonate with other qubits or work on their own if needed. Is there an infinite amount of quantum computational resources in the future that could handle today's [quantum] workload?