Using DMRG with NVIDIA Blackwell GPUs, researchers achieved CAS(89,102) for Fe₅S₁₂H₄⁵⁻—surpassing prior CAS(54,36) limits—setting a rigorous classical benchmark that future quantum algorithms must exceed to claim advantage.
#QuantumChemistry #QuantumAdvantage #News
Kvantify's Qrunch 1.1 adds PT2 correction to BEAST-VQE, achieving 85% energy accuracy and 88% speed improvements for molecular simulations. Validated on IQM's 20-qubit Garnet QPU, targeting drug discovery and battery tech.
#QuantumChemistry #QuantumComputing #News
Decode Quantum with Sabrina Maniscalco from Algorithmiq Welcome to the 84th episode of the Decode Quantum podcast series, which has now more than five years... www.oezratty.net/wordpress/2025/decode-qu... #PostSapiens #quantumenergyinitiative […]
DLR researchers combine ExcitationSolve with Energy Sorting for quadratic speedup in VQE ansatz construction. A single classical sweep selects all relevant operators and warm-starts optimization, reducing CNOT gates via OVP-CEOs on NISQ hardware.
#VQE #QuantumChemistry #NISQ
Argonne National Lab reviews VQE algorithm variants (ADAPT-VQE, qADAPT, nu-VQE, USCC, FMO-VQE) for NISQ quantum chemistry, benchmarking accuracy vs FCI and classical CCSD(T), with ADAPT-VQE outperforming standard VQE using fewer parameters.
#VQE #QuantumChemistry #Research
Rotation-based thresholding in quantum Krylov diagonalization reduces sampling requirements up to 10,000x for ground state energy estimation, validated on polyene chains and the industry-relevant Fe(III)-NTA chelate complex.
#QuantumChemistry #QuantumAlgorithms #NearTermQuantum
First gate-level realization of auxiliary-field QMC projector dynamics on quantum hardware. Uses stochastic Magnus expansions & unitary dilation to execute nonunitary one-body propagators as coherent circuits, validated on IBM hardware.
#QuantumComputing #QuantumChemistry #Research
Shallow, ancilla-free Clifford circuits enable NISQ-compatible evaluation of overlap and Hamiltonian matrix elements in nonorthogonal SCGVB wavefunctions. Validated on H4, quantum estimates match classical Löwdin references with sub-10⁻² Ha mean absolute error.
#QuantumChemistry #NISQ #ValenceBond
V2Rho-FNO applies 3D Fourier Neural Operators to learn the Hohenberg-Kohn potential-to-density map, achieving zero-shot generalization to unseen molecules and resolution transfer via spectral zero-padding without retraining.
#QuantumChemistry #NeuralOperator #DFT
Hybrid quantum-classical workflow using GPT-2-driven GQE computes Auger electron spectra from molecular geometry. Validated on water (12–14 qubits), achieving qualitative agreement with FCI and experiment while reducing gate count 59% vs VQE.
#QuantumChemistry #AugerSpectroscopy #Research
ADAPT-VQE requires exponentially growing circuit depth with molecular size. Rényi entropy from classical CASSCF predicts iteration count (R²≈0.99). Chemically relevant molecules like [Cu₂O₂(NH₃)₆]²⁺ need 5,000+ iterations—far beyond current hardware.
#QuantumChemistry #VQE #Research
New theorem proves 2-RDM matrix completion is unique when constrained to non-zero elements of the two-particle reduced Hamiltonian. A hybrid quantum–stochastic algorithm demonstrates exact reconstruction on the Fermi–Hubbard model.
#QuantumChemistry #QuantumSimulation #Research
SymUCCSD fails for non-Abelian molecules (e.g. NH₃) due to Abelian-subgroup filtering collapsing the Dynamical Lie Algebra to a torus, plus vanishing cross-component gradients in Abelian-adapted orbital bases — confirmed at 21.8 mHa above FCI.
#QuantumChemistry #VQE #Research
FNO-OO-VQE and SVO-OO-VQE combine orbital compression with orbital optimization, cutting VQE measurement costs up to 71.5% on NISQ devices while maintaining chemical accuracy for molecular PES and reaction barrier calculations.
#VQE #QuantumChemistry #NISQ
IBM & Cleveland Clinic simulated the 303-atom Trp-cage miniprotein's electronic structure using SQD algorithm + wave function-based embedding on IBM Heron r2, marking the first quantum-centric supercomputing (QCSC) protein simulation.
#QuantumSimulation #QuantumChemistry #News
GPU4PySCF delivers up to 25× speedup over 28-core CPU for Kohn-Sham DFT via custom CUDA kernels achieving ~80% peak FP64 throughput. A 256-water cluster energy+gradient completes in ~30s on a single NVIDIA H100 GPU.
#QuantumChemistry #GPUAcceleration #DFT
First simulation of a protein's electronic structure using QCSC: IBM Heron r2 + HPC modeled 303-atom Trp-cage miniprotein via EWF-SQD hybrid workflow, achieving accuracy competitive with MP2/CCSD classical benchmarks.
#QuantumComputing #QuantumChemistry #News
STAR architecture ver. 3 combined with molecular model optimization cuts qubit requirements to 1/15–1/80 of conventional FTQC, enabling catalyst energy calculations in ~35 days at 0.10% physical error rate — down from millennia-scale runtimes.
#QuantumChemistry #FaultTolerantQC #News
Andrew Salij and Alex Krotz win the InQuanto Quantum Chemistry Challenge, highlighting how human talent remains the critical driver behind advancing commercial quantum computing applications.
#QuantumChemistry #InQuanto #News
ETH Zurich researchers propose quantum computers act as coprocessors in high-throughput chemistry pipelines, targeting routine molecular calculations over niche strongly-correlated systems to deliver near-term practical utility.
#QuantumChemistry #QuantumComputing #News
IBM Quantum's Fulqrum framework unifies qubit & fermionic Hamiltonian eigensolving via extended-alphabet JW transforms and bit-set subspaces, achieving >10x speedup and up to 130x memory reduction over existing tools like qiskit-addon-sqd and Dice.
#QuantumComputing #QuantumChemistry #Research
Researchers at the UK's NQCC achieved a 6x reduction in qubit scaling for molecular simulations using a CI-matrix QSCI framework with single-bit flip error mitigation and stochastic Trotterization, validated on N2 and naphthalene.
#QuantumChemistry #NISQ #News
Kvantify & IQM Quantum Computers demonstrated computing ammonia's ionization potential using Kvantify's Qrunch tech on IQM's Resonance cloud platform — a full molecular-to-hardware quantum chemistry pipeline. Webinar April 9.
#QuantumChemistry #QuantumComputing #News
First systematic VQE application to homodesmotic reaction schemes computes ring strain energies for cyclopropane–adamantane. Symmetry-matched fraction (SMF) protocol ensures balanced electron correlation, achieving chemical accuracy vs DFT/CCSD benchmarks.
#QuantumChemistry #VQE #Research
SBPT exploits Hamiltonian symmetries to reduce qubit counts and configuration space in molecular simulations. Demonstrated on H₂O and N₂, it outperforms NEVPT2 accuracy with fewer quantum resources via augmented Z₂ symmetry and qubit tapering.
#QuantumChemistry #QuantumComputing #Research
OTI Lumionics used parallel GPU-accelerated iQCC to simulate ruthenium catalysts at 100–124 qubits, surpassing DMRG accuracy. Quantum advantage threshold in chemistry may now exceed 200 qubits.
#QuantumChemistry #GPUComputing #News
RIKEN & ELTE researchers computed H₂O rovibrational energy levels on Quantinuum's Reimei trapped-ion QC using a hybrid QSCI method, achieving sub-1 cm⁻¹ accuracy for low-lying states—demonstrating near-term quantum utility in molecular spectroscopy.
#QuantumChemistry #QuantumComputing #Research
Infleqtion secured $3.9M from DOE's ARPA-E under the QC3 program to develop quantum algorithms accelerating chemistry and materials science simulations, targeting commercial energy applications via neutral-atom quantum computing.
#QuantumComputing #QuantumChemistry #News
A velocity Verlet optimizer adapted from molecular dynamics achieves chemical accuracy on H₂ with fewer circuit evaluations than L-BFGS-B (3,543 vs 4,253) and attains the lowest final energy on 12-qubit LiH, outperforming standard classical optimizers.
#VQE #QuantumChemistry #Research
HQS researchers map molecular Hamiltonians to spin-boson qubit models using RPA-inspired HOMO/LUMO partitioning, achieving chemical accuracy (1 kcal/mol) for vertical excitation energies of select molecules with only 62–126 environment qubits.
#QuantumChemistry #QuantumComputing #Research
