Quantum 10, 2168 (2026). https://doi.org/10.22331/q-2026-07-22-2168 How many $T$ gates are needed to approximate an arbitrary $n$-qubit quantum state to within error $varepsilon$? Improving prior work of Low, Kliuchnikov, and Schaeffer, we show that the optimal […]
Quantum 10, 2167 (2026). https://doi.org/10.22331/q-2026-07-20-2167 Quantum Zeno dragging enables the preparation of common eigenstates of a set of observables by frequent measurement and adiabatic-like modulation of the measurement basis. In this work, we present a […]
Quantum 10, 2166 (2026). https://doi.org/10.22331/q-2026-07-20-2166 Noisy intermediate-scale quantum (NISQ) devices pave the way for implementing quantum algorithms that offer quantum advantages over their classical counterparts. Due to the intrinsic noise and decoherence in the physical […]
Quantum 10, 2165 (2026). https://doi.org/10.22331/q-2026-07-18-2165 In this work, we study the complexity of graph-state preparation in a general model of quantum algorithms that allows measurements in the computational basis, single-qubit Clifford operations, and two-qubit Clifford […]
Quantum 10, 2164 (2026). https://doi.org/10.22331/q-2026-07-18-2164 Quantum many-body scars (QMBS) serve as important examples of ergodicity-breaking phenomena in quantum many-body systems. Despite recent extensive studies, exact QMBS are rare in dimensions higher than one. In this […]
Quantum 10, 2163 (2026). https://doi.org/10.22331/q-2026-07-16-2163 We introduce a new characterisation of determinism in Measurement-Based Quantum Computing (MBQC). The one-way model consists in performing local measurements over a large entangled state represented by a graph. The […]
Quantum 10, 2162 (2026). https://doi.org/10.22331/q-2026-07-15-2162 We present a two-step protocol for quantum measurement tomography that is light on classical co-processing cost and still achieves optimal sample complexity. Given measurement data from a known probe state […]
Quantum 10, 2161 (2026). https://doi.org/10.22331/q-2026-07-15-2161 The MPC-in-the-head technique (Ishai et al., STOC 2007) is a celebrated method to build zero-knowledge protocols with desirable theoretical properties and high practical efficiency. This technique has generated a large […]
Quantum 10, 2160 (2026). https://doi.org/10.22331/q-2026-07-15-2160 The preparation of quantum many-body systems faces the difficulty that in a realistic scenario only few control parameters of the system may be accessible. In this context, an interesting connection […]
Quantum 10, 2159 (2026). https://doi.org/10.22331/q-2026-07-15-2159 We investigate the emergence of cooperative radiation phenomena in ensembles of two-level atoms coupled to a lossy resonant cavity beyond the Markovian and mean-field approximations. By deriving a complete analytical […]
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