Composite pulses suppress coherent control errors by >70% in NV ensembles, enabling robust multi-pulse quantum gates critical for ensemble magnetometry despite short coherence times and hardware constraints.
@informaq.bsky.social
@informaq.bsky.socialComposite pulses suppress coherent control errors by >70% in NV ensembles, enabling robust multi-pulse quantum gates critical for ensemble magnetometry despite short coherence times and hardware constraints.
@informaq.bsky.socialNovel error mitigation methods based on reactivity functions provide tunable, systematic improvements over conventional approaches, achieving up to 1000× sampling cost reductions in numerical studies of quantum circuits.
@informaq.bsky.socialMultiphoton control protocols drastically reduce state preparation times for bosonic quantum error correction on superconducting circuits, allowing faster encoding with less decoherence—a key milestone toward scalable fault-tolerant quantum computing.
@informaq.bsky.socialProtocol using three-level atom ancilla halves evolution steps for arbitrary cavity quantum state generation, with improved robustness to control field errors and enhanced speed-limit efficiency over two-level systems.
@informaq.bsky.socialDeveloped a new q-derivative operator from Jackson's q-algebra that preserves thermodynamic consistency while enabling analytical pulse-shaping corrections for leakage suppression in superconducting qubits, generalizing the DRAG technique.
@informaq.bsky.socialChanging probe preparation from encoded to product state dramatically reduces calibration sample requirements, enabling quantum error correction tasks that exceed budget constraints with traditional methods.
@informaq.bsky.socialDifferent quantum measurements preserving the same average channel exhibit opposite feedback-strength scaling for ensemble preparation: inverse-accuracy divergence versus logarithmic growth, reshaping quantum control resource specifications.
@informaq.bsky.socialExceptional-point-based protocols enable direction-dependent chiral transfer between even-parity Bell states and dissipative entanglement generation in two-qubit systems via engineered two-photon loss mechanisms.
@informaq.bsky.socialTime-domain linear optimization of dissipative ground-state preparation filters combined with Lieb-Robinson locality grading reduces implementation costs by 27-56% and heating leakage by 2.9-2000× on molecular systems and spin chains.
@informaq.bsky.socialElementary construction demonstrates AND-gate logic in cavity photon means through two-pump beam-splitter interactions, matching the 3/4 quantum no-signalling bound without requiring entanglement.
@informaq.bsky.socialSub-Riemannian geodesic optimization achieves 99.96% fidelity for single-qubit gates while suppressing leakage errors, outperforming DRAG pulses at short pulse durations in superconducting qubits.
@informaq.bsky.socialCisco's Outshift division unveiled software prototypes enabling entanglement-as-a-service across multi-vendor quantum hardware. The Network-Aware Quantum Compiler v0.2.0 integrates distributed error correction, demonstrating 99% polarization fidelity.
@informaq.bsky.socialNUS researchers show manipulating quantum state space connectivity achieves 5× signal amplification beyond conventional limits and enables strong boundary localization, offering new control over non-Hermitian many-body phenomena.
@informaq.bsky.socialComplete characterization of spectral gaps across phase transitions in Gibbs-sampler Lindbladians for quantum simulation, revealing distinct scaling laws in disordered, critical, and ordered phases.
@informaq.bsky.socialWe develop a Markovian framework for tracking thermal states during quantum critical crossings. Engineered dissipation suppresses thermal excitations by orders of magnitude with steeper quadratic scaling than unitary dynamics.
@informaq.bsky.socialSTIRSAP technique accelerates quantum state transfer between metastable Ca⁺ states by >3×, eliminating first-order Doppler effects via three-photon resonance and counterdiabatic driving—without additional coupling fields.
@informaq.bsky.socialResearchers develop an experimentally efficient framework for quantifying non-Markovianity using witness operators, reducing measurement overhead from 15 parameters to just 1-3 correlation measurements while maintaining rigor.
@informaq.bsky.socialWe classify which Lindbladian components remain learnable under unknown SPAM noise and design efficient protocols using only trusted single-qubit gates, with near-optimal scaling independent of system size.
@informaq.bsky.socialResearchers demonstrated proximity-induced localization in coupled quasiperiodic chains and its reversal through detuning control, with experimental validation on IBM quantum hardware revealing controlled wavefunction spreading dynamics.
@informaq.bsky.socialNear quantum critical points, non-Markovian effects enable simultaneous optimization of efficiency, power, and stability in quantum Otto engines via energy spectrum engineering—overcoming traditional power-efficiency trade-offs.