Latest posts tagged with #QuantumControl on Bluesky
Researchers propose applying small static offsets to tunable system parameters to suppress quantum state leakage without modifying control pulses or adding time overhead, achieving >99.9% gate fidelity in superconducting qubit simulations.
#QuantumControl #SuperconductingQubits #Research
Q-PulsePol fixes PulsePol's finite-pulse symmetry-breaking via a single phase adjustment, restoring quadrature symmetry and enabling robust, power-independent bulk nuclear hyperpolarization validated experimentally at 0.35 T.
#QuantumControl #DynamicNuclearPolarization #Research
Robert Bosch GmbH patent filing details an apparatus converting problem descriptions into quantum mechanical representations via unitary transformations, generating control signals to measure observables on quantum computers using occupation number bases.
#QuantumComputing #QuantumControl #Patent
QEDMA Quantum Computing LTD. patent filing describes a ZZ-rotation two-qubit gate method using detuned rotation pulses and Pauli-ZZ-commuting echo pulses applied twice to XX-coupled qubits, enabling precise entangling rotation control.
#QuantumGates #QuantumControl #Patent
Patent covers an apparatus converting problem descriptions into quantum mechanical representations via unitary transformations, translating them into operation sequences, and generating control signals to measure quantum computer observables.
#QuantumComputing #QuantumControl #Patent
Patent covers an apparatus designed to generate control signals for measuring quantum element states in a quantum computer, targeting the critical readout/measurement layer essential for qubit state extraction and quantum computation fidelity.
#QuantumComputing #QuantumControl #Patent
HRL Labs achieves 99.86% avg Clifford gate fidelity with an AEON spin qubit in a Si/SiGe triangular quantum dot array, using simultaneous exchange pulses and blind randomized benchmarking — reducing circuit depth and leakage vs. sequential-pulse methods.
#SpinQubits #QuantumControl #News
Researchers use dynamical modulation to suppress counter-rotating terms in ultrastrong-coupled Dicke quantum batteries, reaching Tavis-Cummings-comparable charging efficiency with robust resilience to dephasing and dissipation noise.
#QuantumBatteries #QuantumControl #News
Researchers at Univ. of Nottingham developed a Langevin-based optimal filter for waveguide QED 'giant cavities', achieving 15% better state estimation by accounting for non-Markovian delays and nonlocal coupling — enabling improved quantum feedback control.
#WaveguideQED #QuantumControl #News
Rigorous nonperturbative bounds derived for the rotating-wave approximation (RWA) in open quantum systems with dissipation/decoherence, unifying strong-coupling limits and secular approximation via a novel integration-by-parts lemma for GKLS generators.
#QuantumControl #OpenQuantumSystems #Research
Researchers at USP derived a deterministic master equation handling arbitrary non-Markovian feedback by encoding memory into auxiliary degrees of freedom, recasting complex quantum dynamics as Markovian evolution in an expanded Hilbert space.
#QuantumControl #QuantumInformationTheory #News
Coupled quantum van der Pol oscillators exhibit a synchronization blockade via normal mode splitting, where destructive interference between hybridized modes suppresses phase-locking—controllable by tuning coupling strength and detuning.
#QuantumSynchronization #QuantumControl #Research
On-FPGA co-location of pulse generation, acquisition, and analysis achieves T1 estimation in 10ms, pulse calibration in 1ms, and 74,000+ recalibrations over 6hrs, reducing gate infidelity 6.4% vs static baseline.
#SuperconductingQubits #QuantumControl #Research
RSE protocol confines bosonic dynamics to a 2D invariant subspace, enabling deterministic Fock state preparation with O(n^1/4) scaling. Prepares |n=380⟩ in just 5 gate iterations using displacement and SNAP gates in circuit QED.
#QuantumControl #BosonicQubits #Research
A proportional feedback loop using only an optical amplifier drives one quantum system to mimic another's response in real-time—demonstrated by hydrogen replicating argon's HHG spectra and a weakly-correlated lattice reproducing Mott-insulator transport.
#QuantumControl #QuantumMaterials #Research
A simplified asymptotic method for the Landau-Zener transition uses elementary waves with quadratic+logarithmic phases to reveal that a logarithmic phase singularity is the physical origin of the exponential transition probability amplitude.
#QuantumControl #QuantumPhysics #Research
Researchers extend NV-ERC protocol from SU(2) to full SU(3) control of NV center spin-1 triplets using monochromatic microwave pulses, enabling fast arbitrary qutrit gates and complete quantum state tomography without strong magnetic fields.
#QuantumControl #NVCenters #Qutrits
A Proximal-ADMM framework integrates L1 sparsity, total-variation, band-limit, and box constraints for quantum pulse design. Benchmarked vs GRAPE/Krotov/L-BFGS-B, it achieves fidelities ~0.667 (qutrit) and ~0.634 (2Q) at markedly lower pulse complexity.
#QuantumControl #PulseSynthesis #Research
Stability-certified framework for high-dimensional quantum feedback control uses Hierarchical Tucker tensor surrogates, proving practical exponential stability with rank requirements scaling only logarithmically with tracking precision.
#QuantumControl #TensorNetworks #Research
New MAGICARP algorithm uses Pontryagin's Maximum Principle to outperform GRAPE in implementing quantum gates on molecular spin qudits (TbPc₂, Tb₂Pc₃), delivering faster, smoother pulses—especially in higher-dimensional Hilbert spaces.
#QuantumControl #SpinQudits #Research
FF-QCRL integrates filter function formalism into the quantum control robustness landscape to generate robust parametric gate pulses under realistic time-varying noise in NISQ processors, validated numerically on a single-qubit system.
#QuantumControl #NISQ #Research
Nobel laureate John Martinis explains how flux-tunable superconducting qubits demand noise control at ~10μV levels, single-point grounding, and direct measurement over assumption — announcing the John Martinis Prize for hands-on qubit access.
#SuperconductingQubits #QuantumControl #News
New optimal filter for giant cavity waveguide QED systems handles non-Markovian dynamics via delayed-state covariance matrices and interval-wise backward recursion, validated on coherent and Schrödinger cat states.
#WaveguideQED #QuantumControl #Research
Los Alamos researchers engineered control Hamiltonians and feedback loops to create time-reversed stochastic trajectories in qubits, enabling a quantum 'Maxwell's demon' that extracts energy from measurements. Published in Physical Review X.
#QuantumThermodynamics #QuantumControl #News
Fermilab & Stanford present XCOM: a full-mesh network synchronizing QICK RFSoC boards to <100ps timing skew with deterministic all-to-all communication latency below 186ns, enabling scalable multi-qubit superconducting control systems.
#QuantumControl #QICK #Research
Dark (spectator) states are shown to be sufficient for Population-Phase Symmetry (PΦS) in 3- and 4-level quantum systems under closed-loop driving, confining dynamics to SU(2)/SU(3) subspaces—enabling robust coherent control for QIP.
#QuantumControl #CoherentPopulationTrapping #Research
Qblox partners with Prodrive Technologies to open a Canton, MA manufacturing hub, shipping 'Made in America' quantum control systems from April 2026 to boost U.S. supply-chain resilience.
#QuantumComputing #QuantumControl #News
Proves controlled quantum states form rings isomorphic to multilinear polynomials in the ZXW-calculus, enabling completeness for factoring arbitrary qubit Hamiltonians—even with black-box matrix terms—via new graphical rewrite rules.
#QuantumComputing #ZXWCalculus #QuantumControl
Using Krotov quantum optimal control and open systems simulation, researchers demonstrate F≥0.9 gate fidelity is achievable in atomic-scale surface qubit platforms, outperforming standard Rabi drives against static exchange coupling noise.
#QuantumComputing #QuantumControl #News
Using Krotov quantum optimal control and open systems simulation, researchers demonstrate F≥0.9 gate fidelity is achievable in atomic-scale surface qubit platforms, outperforming standard Rabi drives against static exchange coupling noise.
#QuantumComputing #QuantumControl #News
