A cavity-based method converts qubit frequency noise into measurable photon loss, validated with injected noise and yielding an upper bound of 5e3 Hz²/Hz at 508 MHz.
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Experimental demonstration of universal qudit control on a cavity oscillator via compiled Jaynes-Cummings gates with a transmon ancilla, reaching 96% mean post-selected process fidelity for qutrit gates.
Demonstrates a direct controlled-phase gate between microwave photons in cavities via Raman-assisted cross-Kerr coupling that leaves the nonlinear mediator unexcited.
Sparse phase ansatzes for the SNAP-displacement protocol achieve favorable fidelity versus resource trade-offs for qudit state preparation up to dimension 64 in both ideal and noisy regimes.
The authors prove existence of a unitary that maps a two-qubit state to one where a single observable expectation equals the initial concurrence and demonstrate a robust optimal control implementation via numerical simulations.
citing papers explorer
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Qubit Noise Sensing via Induced Photon Loss in a Superconducting Cavity
A cavity-based method converts qubit frequency noise into measurable photon loss, validated with injected noise and yielding an upper bound of 5e3 Hz²/Hz at 508 MHz.
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Universal Jaynes-Cummings Control of an Oscillator
Experimental demonstration of universal qudit control on a cavity oscillator via compiled Jaynes-Cummings gates with a transmon ancilla, reaching 96% mean post-selected process fidelity for qutrit gates.
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A direct controlled-phase gate between microwave photons
Demonstrates a direct controlled-phase gate between microwave photons in cavities via Raman-assisted cross-Kerr coupling that leaves the nonlinear mediator unexcited.
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Sparse Phase Ansatzes for Resource-Efficient Qudit State Preparation via the SNAP-Displacement Protocol
Sparse phase ansatzes for the SNAP-displacement protocol achieve favorable fidelity versus resource trade-offs for qudit state preparation up to dimension 64 in both ideal and noisy regimes.
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Existence of a robust optimal control process for efficient measurements in a two-qubit system
The authors prove existence of a unitary that maps a two-qubit state to one where a single observable expectation equals the initial concurrence and demonstrate a robust optimal control implementation via numerical simulations.