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Electronic Colloquium on Computational Complexity

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TR26-103 | 18th June 2026
Avishay Tal, Weiqiang Yuan

Quantum Advantage in Tolerant Junta Testing

We establish the first super-polynomial quantum advantage for the tolerant junta testing problem in the adaptive setting. Specifically, we show that within a certain parameter regime, tolerant $k$-junta testing with high precision can be solved using $\mathrm{poly}(k)$ quantum queries, whereas any classical algorithm requires at least $k^{\Omega(\log k)}$ queries.

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TR26-102 | 18th June 2026
Liyan Chen, Matthew M. Hong, Yael Tauman Kalai, Zoe Xi

Towards a Doubly E?cient IP=PSPACE

Revisions: 1

We show that every language in PSPACE decidable by a Turing machine in time $T(n)=n^{O(\log n)}$ admits a doubly efficient interactive proof system: the prover runs in time polynomial in T(n), and the verifier runs in time polynomial in n. This extends the best previously known regime for such proof ... more >>>


TR26-101 | 3rd June 2026
Sravanthi Chede, Leroy Chew, Vaibhav Krishan, Anil Shukla

On Proof Systems for #QBF

For a quantified Boolean formula (QBF), the problem of computing the number of winning strategies is known as the #QBF problem. This problem is considered harder than the analogous #SAT problem. Recently, important proof systems for QBFs and #SAT have been studied. By extending the ideas from both fields, we ... more >>>



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