Classical Shadow Tomography for Non-IID Quantum Sources

Proves classical shadow tomography retains standard i.i.d. sample complexity—governed by the shadow norm—for fully adaptive, history-dependent quantum sources, using a truncated mean estimator and Freedman's martingale inequality.

#QuantumTomography #ClassicalShadows #QuantumInformation

Optimization Framework for Monitor Placement in Quantum Network Tomography

ILP-based framework optimizes monitor placement in quantum networks using QFIM & QCRB. Two formulations (QF, QMF) balance estimation accuracy vs. monitoring overhead, with proven optimality for star topologies and O(n log n) algorithm.

#QuantumNetworking #QuantumTomography #Research

Efficient Learning Algorithms for Noisy Quantum State and Process Tomography

New provably efficient framework learns noisy n-qubit quantum states & processes using only polynomial samples—no circuit priors needed. Handles unital & non-unital noise at any strength, enabling scalable NISQ device characterization and error mitigation.

#QuantumTomography #NISQ #Research

No-cost Bell Nonlocality Certification from Quantum Tomography and Its Applications in Quantum Magic Witnessing
Harald Weinfurter, Lukas Knips et al.
Paper
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#QuantumTomography #BellNonlocality #QuantumMagicWitnessing

5/
Grateful to an amazing team:
Hong-Ye Hu, PhD, Andi Gu, Swarnadeep Majumder, Hang Ren, Yipei Zhang, Derek S. Wang, Yi-Zhuang You, Susanne Yelin, Alireza Seif 🙏

Original post: thanks Hong-Ye!
#QuantumComputing #NISQ #BayesianInference #QuantumTomography #NatureCommunications

Two Postdoc positions in Quantum Information and Thermodynamics in Prague | Quantiki

Two Postdoc positions in quantum information and thermodynamics, Department of Condensed Matter Physics, Charles University, Prague, Czech Republic

#QuantumInformation #QuantumTomography #QuantumThermodynamics

www.quantiki.org/position/two...

Two fully funded PhD Positions in Quantum Information and Thermodynamics at Charles University, Prague | Quantiki

Two Fully Funded PhD Positions in Quantum Information and Thermodynamics, Department of Condensed Matter Physics, Charles University, Prague, Czech Republic

#QuantumInformation #QuantumTomography #QuantumThermodynamics

www.quantiki.org/position/two...

Overcomplete quantum tomography of a path-entangled two-photon state Path-entangled $N$-photon states are key resources for quantum enhanced metrology and quantum imaging, as well as quantum computation. However, the quantum tomography of path-entangled indistinguishable photons is still in its infancy. We propose and implement a quantum tomographical method to characterize path-entangled two-photon NOON states, which can be extended to arbitrary $N$. To access both the populations and the coherences of the path-encoded density matrix, a single ancilla spatial mode is introduced, and photon correlations are performed as a function of a single phase within an interferometer. We characterize a two-photon state generated through the Hong-Ou-Mandel interference of indistinguishable single photons emitted by a semiconductor quantum dot and show that an overcomplete data set reveals spatial coherences that could be otherwise hidden due to limited statistics. We finally extract the truly indistinguishable part of the density matrix and identify the main origin for the reduced degree of entanglement.

It took some time... but finally our paper on the NOON quantum tomography is published! Congrats to Lorenzo and the rest of the team! #overcompleted #QDs #singlephotons #quantumtomography

link.aps.org/doi/10.1103/Ph…