Quantum 10, 2068 (2026). https://doi.org/10.22331/q-2026-04-15-2068 The present era of quantum processors with hundreds to thousands of noisy qubits has sparked interest in understanding the computational power of these devices and how to leverage it to […]
Quantum 10, 2067 (2026). https://doi.org/10.22331/q-2026-04-15-2067 Approximating the $k$-th spectral gap $Delta_k=|lambda_k-lambda_{k+1}|$ and the corresponding midpoint $mu_k=frac{lambda_k+lambda_{k+1}}{2}$ of an $Ntimes N$ Hermitian matrix with eigenvalues $lambda_1geqlambda_2geqldotsgeqlambda_N$, is an important special case of the eigenproblem with numerous […]
Quantum 10, 2066 (2026). https://doi.org/10.22331/q-2026-04-15-2066 We describe a novel scheme for the generation of stationary entanglement between two separated qubits that are driven by a purely thermal photon source. While in this scenario the qubits […]
Quantum 10, 2065 (2026). https://doi.org/10.22331/q-2026-04-13-2065 Estimating spectral gaps of quantum many-body Hamiltonians is a highly challenging computational task, even under assumptions of locality and translation-invariance. Yet, the quest for rigorous gap certificates is motivated by […]
Quantum 10, 2064 (2026). https://doi.org/10.22331/q-2026-04-13-2064 The solutions to many problems in the mathematical, computational, and physical sciences often involve multidimensional integrals. A direct numerical evaluation of the integral incurs a computational cost that is exponential […]
Quantum 10, 2063 (2026). https://doi.org/10.22331/q-2026-04-13-2063 Quantum simulation has emerged as a key application of quantum computing, with significant progress made in algorithms for simulating both closed and open quantum systems. The simulation of open quantum […]
Quantum 10, 2062 (2026). https://doi.org/10.22331/q-2026-04-13-2062 Efficient parametrizations of quantum states are essential for trainable hybrid classical-quantum algorithms. A key challenge in their design consists in adapting to the available qubit connectivity of the quantum processor, […]
Quantum 10, 2061 (2026). https://doi.org/10.22331/q-2026-04-13-2061 Encoding logical qubits with surface codes and performing multi-qubit logical operations with lattice surgery is one of the most promising approaches to demonstrate fault-tolerant quantum computing. Thus, a method to […]
Quantum 10, 2060 (2026). https://doi.org/10.22331/q-2026-04-13-2060 We propose a general framework for computing Retarded Green’s Functions (RGFs) on quantum computers by recasting their evaluation as a problem of circuit differentiation. Our proposal is based on real-time […]
Quantum 10, 2059 (2026). https://doi.org/10.22331/q-2026-04-10-2059 Non-stabilizerness, also known as “magic,” quantifies how far a quantum state departs from the stabilizer set. It is a central resource behind quantum advantage and a useful probe of the […]
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