Quantum 9, 1851 (2025). https://doi.org/10.22331/q-2025-09-05-1851 Local Friendliness (LF) inequalities follow from seemingly reasonable assumptions about reality: (i) “absoluteness of observed events” (e.g., every observed event happens for all observers) and (ii) “local agency” (e.g., free […]
Quantum 9, 1850 (2025). https://doi.org/10.22331/q-2025-09-05-1850 We study simultaneous symmetry breaking in spontaneous Floquet states, focusing on the specific case of an atomic condensate. We first describe the quantization of the Nambu-Goldstone (NG) modes for a […]
Quantum 9, 1849 (2025). https://doi.org/10.22331/q-2025-09-05-1849 A central goal in quantum error correction is to reduce the overhead of fault-tolerant quantum computing by increasing noise thresholds and reducing the number of physical qubits required to sustain […]
Quantum 9, 1848 (2025). https://doi.org/10.22331/q-2025-09-05-1848 Randomized benchmarking (RB) protocols are widely used to measure an average error rate for a set of quantum logic gates. However, the standard version of RB is limited because it […]
Quantum 9, 1847 (2025). https://doi.org/10.22331/q-2025-09-03-1847 In this work, we highlight an unforeseen behavior of the expressivity of Parameterized Quantum Circuits (PQCs) for machine learning. A large class of these models, seen as Fourier series whose […]
Quantum 9, 1846 (2025). https://doi.org/10.22331/q-2025-09-03-1846 Code switching is an established technique that facilitates a universal set of FT quantum gate operations by combining two QEC codes with complementary sets of gates, which each by themselves […]
Quantum 9, 1845 (2025). https://doi.org/10.22331/q-2025-09-03-1845 We consider introducing the Dirac sea in a quantum cellular automata model of fermions in discrete spacetime which approximates the Dirac equation in the continuum limit. However, if we attempt […]
Quantum 9, 1844 (2025). https://doi.org/10.22331/q-2025-09-03-1844 Generalizing the well-known spin-squeezing inequalities, we study the relation between squeezing of collective $N$-particle $su(d)$ operators and many-body entanglement geometry in multi-particle systems. For that aim, we define the set […]
Quantum 9, 1843 (2025). https://doi.org/10.22331/q-2025-08-29-1843 Building upon recent progress in Lindblad engineering for quantum Gibbs state preparation algorithms, we propose a simplified protocol that is shown to be efficient under the eigenstate thermalization hypothesis (ETH). […]
Quantum 9, 1842 (2025). https://doi.org/10.22331/q-2025-08-29-1842 Starting with an explicit framework for designing logical Clifford circuits for CSS codes, we construct logical gates for Hypergraph Product Codes. We first derive symplectic matrices for CNOT, CZ, Phase, […]
Recent Comments