Developed 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.

#QuantumControl #SuperconductingQubits #Research

Sub-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.

#QuantumControl #SuperconductingQubits #Research

Successfully extracted topological invariants via momentum-selective measurements on superconducting qubits. Mapped extended SSH model phase diagram with quantized winding numbers, validating direct band-topology tomography on quantum processors.

#QuantumTopology #SuperconductingQubits #Research

PDRAG achieves 5.27×10⁵-fold leakage reduction in superconducting qubit gates through simultaneous control of both leakage channels using derivative-based pulse shaping, with endpoint leakage reaching 1.98×10⁻⁷ at 13 ns.

#QuantumGates #SuperconductingQubits #Research

Tantalum thin films achieve record T1 relaxation times exceeding 1ms and internal quality factors surpassing 10 million, significantly outperforming aluminum and niobium in superconducting qubit performance.

#SuperconductingQubits #QuantumHardware #News

Demonstrated adaptive measurement-based reset protocol using Bayesian inference achieves 99.44% ground-state initialization fidelity in superconducting qubits with deterministic timing for scalable multi-qubit processors.

#QuantumControl #SuperconductingQubits #Research

Stress-induced low-gap superconducting regions in niobium films significantly degrade microwave performance while remaining invisible to conventional transport measurements, revealing a critical materials challenge for quantum device fabrication.

#SuperconductingQubits #QuantumHardware #Research

Researchers at Chinese Academy of Sciences achieved a 4× increase in logical qubit coherence by compiling error recovery into transmon control cycles, eliminating measurement overhead while maintaining stability through pulse-level compilation.

#QuantumErrorCorrection #SuperconductingQubits #News

Four computational methods validate electromagnetic coupling extraction in superconducting processors with <5% variance, advancing precise characterization for fault-tolerant quantum systems.

#SuperconductingQubits #QuantumHardware #Research

Researchers demonstrate superconducting transistors as a solution to the fundamental challenge of controlling qubits at cryogenic temperatures, potentially eliminating complex external control electronics.

#QuantumHardware #SuperconductingQubits #News

Novel encapsulation epitaxy enables large-area, air-stable monolayer NbSe₂ films with exceptional crystalline quality and 0.71 nH/□ kinetic inductance, demonstrating integration into superconducting quantum circuits.

#SuperconductingQubits #QuantumHardware #Research

Novel approach compiles local quantum error correction recovery directly into fixed, input-independent control pulses on transmon qubits without measurement feedback, improving scalability of fault-tolerant quantum computing.

#QuantumErrorCorrection #SuperconductingQubits #Research

High-fidelity remote two-qubit gates demonstrated between superconducting qubits via coaxial cable with infidelity below 10⁻⁶. This approach enables scalable modular quantum computing without additional tunable coupling elements.

#SuperconductingQubits #QuantumGates #Research

Sulfur passivation and argon milling improved interface chemistry and superconducting transport, but failed to reduce microwave loss in Nb-InP resonators, suggesting loss mechanisms lie elsewhere—possibly substrate or quasiparticle pathways.

#SuperconductingQubits #QuantumHardware #Research

Demonstrated high-fidelity controlled-Z gate for hybrid superconducting qubits achieving 99.99% fidelity in 25ns using single-parameter flux control, with negligible leakage and robust scalability to larger architectures.

#QuantumGates #SuperconductingQubits #Research

Proposes an unprotected CZ gate for capacitively coupled soft 0-π qubits with simulated fidelity of ~99.9% at ~160ns gate time, addressing the gap in two-qubit gate implementations for this promising protected qubit platform.

#QuantumGates #SuperconductingQubits #Research

Experimental study of 14 superconducting transmons reveals universal scaling law for chaos thresholds in parametric drives: ηmax ∝ γ^0.61, where γ = ωq/|α|. Floquet and semiclassical simulations validate the relationship across wide parameter ranges.

#SuperconductingQubits #QuantumControl #Research

Northrop Grumman demonstrates a CMOS current-based DAC operating at cryogenic temperatures for precise flux control of superconducting qubits, achieving high-fidelity readout and preparation with digitally tunable waveforms.

#CryogenicControl #SuperconductingQubits #QuantumHardware

Demonstrated rigorous certification of two-qubit entanglement in QAOA on superconducting hardware through causal manipulation of coupler drive parameters; disclosed prior compilation faults and implemented reproducible safeguards.

#QAOA #SuperconductingQubits #Research

Squeezed microwaves recover magnetic-field information lost during qubit readout, improving superconducting-qubit magnetometer sensitivity by 27.3% through suppressed state-assignment errors in the measurement stage.

#SuperconductingQubits #QuantumSensing #Squeezing