New BM-Cert protocol verifies n-qubit GHZ states using only disjoint Bell measurements, achieving spectral gap 1−O(1/n)—approaching ideal projective certification asymptotically and surpassing local Pauli methods.
#QuantumVerification #GHZState #Research
#QuantumVerification #GHZState #Research
Bell-Matching Certification for Multipartite GHZ States
arxiv.org
June 13, 2026 at 9:50 AM
New BM-Cert protocol verifies n-qubit GHZ states using only disjoint Bell measurements, achieving spectral gap 1−O(1/n)—approaching ideal projective certification asymptotically and surpassing local Pauli methods.
#QuantumVerification #GHZState #Research
#QuantumVerification #GHZState #Research
A recipe transforms any GHZ-preparing CNOT block into a fanout gate at twice the depth. Applied to IBM's ibm_fez heavy-hex topology, this yields a 156-qubit fanout (depth 33) enabling single-shot full characterization of 156-qubit GHZ states.
#QuantumCircuits #GHZState #Research
#QuantumCircuits #GHZState #Research
Single-Shot GHZ Characterization via Connectivity-Aware Fanout Constructions
iq.fp2.dev
March 28, 2026 at 10:45 PM
A recipe transforms any GHZ-preparing CNOT block into a fanout gate at twice the depth. Applied to IBM's ibm_fez heavy-hex topology, this yields a 156-qubit fanout (depth 33) enabling single-shot full characterization of 156-qubit GHZ states.
#QuantumCircuits #GHZState #Research
#QuantumCircuits #GHZState #Research