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.
Ultracoherent super- conducting cavity-based multiqudit platform with error-resilient control,
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Two feedforward DNNs map target cavity EM observables and qubit–cavity parameters (g, νq, α) to candidate SRF and transmon geometries that re-simulate to within ~5% and ~2%.
NDAR, a heuristic that turns device noise into a resource, is generalized to integer-domain optimization; qudit-native encodings are argued to be the best fit because their all-zeros attractor is always feasible and their gauge freedom is maximal.
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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Neural-Network Inverse Design of SRF Cavities and Transmons for Bosonic Quantum Computation
Two feedforward DNNs map target cavity EM observables and qubit–cavity parameters (g, νq, α) to candidate SRF and transmon geometries that re-simulate to within ~5% and ~2%.
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Noise-Directed Adaptive Remapping for Integer Optimization: from qubits to (encoded) qudits
NDAR, a heuristic that turns device noise into a resource, is generalized to integer-domain optimization; qudit-native encodings are argued to be the best fit because their all-zeros attractor is always feasible and their gauge freedom is maximal.
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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.