Quantum 8, 1480 (2024). https://doi.org/10.22331/q-2024-09-25-1480 Phase estimation plays a central role in communications, sensing, and information processing. Quantum correlated states, such as squeezed states, enable phase estimation beyond the shot-noise limit, and in principle approach […]
Quantum 8, 1479 (2024). https://doi.org/10.22331/q-2024-09-19-1479 In order to substantiate claims of quantum computational advantage, it is crucial to develop efficient methods for validating the experimental data. We propose a test of the correct functioning of […]
Quantum 8, 1478 (2024). https://doi.org/10.22331/q-2024-09-19-1478 Recent advancements in multi-mode Gottesman-Kitaev-Preskill (GKP) codes have shown great promise in enhancing the protection of both discrete and analog quantum information. This broadened range of protection brings opportunities beyond […]
Quantum 8, 1477 (2024). https://doi.org/10.22331/q-2024-09-19-1477 Quantum Krylov subspace diagonalization (QKSD) is an emerging method used in place of quantum phase estimation in the early fault-tolerant era, where limited quantum circuit depth is available. In contrast […]
Quantum 8, 1476 (2024). https://doi.org/10.22331/q-2024-09-19-1476 In this paper, we propose a novel bipartite entanglement purification protocol built upon hashing and upon the guessing random additive noise decoding (GRAND) approach recently devised for classical error correction […]
Quantum 8, 1475 (2024). https://doi.org/10.22331/q-2024-09-17-1475 We introduce a novel method of efficiently simulating the non-equilibrium steady state of large many-body open quantum systems with highly non-local interactions, based on a variational Monte Carlo optimization of […]
Quantum 8, 1474 (2024). https://doi.org/10.22331/q-2024-09-17-1474 The Schwinger model is one of the simplest gauge theories. It is known that a topological term of the model leads to the infamous sign problem in the classical Monte […]
Quantum 8, 1473 (2024). https://doi.org/10.22331/q-2024-09-12-1473 Identical quantum particles exhibit only two types of statistics: bosonic and fermionic. Theoretically, this restriction is commonly established through the symmetrization postulate or (anti)commutation constraints imposed on the algebra of […]
Quantum 8, 1472 (2024). https://doi.org/10.22331/q-2024-09-12-1472 Nielsen’s approach to quantum state complexity relates the minimal number of quantum gates required to prepare a state to the length of geodesics computed with a certain norm on the […]
Quantum 8, 1471 (2024). https://doi.org/10.22331/q-2024-09-12-1471 The problem of efficient quantum state learning, also called shadow tomography, aims to comprehend an unknown $d$-dimensional quantum state through POVMs. Yet, these states are rarely static; they evolve due […]
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