Quantum 9, 1914 (2025). https://doi.org/10.22331/q-2025-11-17-1914 An important class of fermionic observables, relevant in tasks such as fermionic partial tomography and estimating energy levels of chemical Hamiltonians, are the binary measurements obtained from the product of […]
Quantum 9, 1913 (2025). https://doi.org/10.22331/q-2025-11-17-1913 In this work, we develop a graphical calculus for multi-qudit computations with generalized Clifford algebras, building off the algebraic framework developed in our prior work. We build our graphical calculus […]
Quantum 9, 1912 (2025). https://doi.org/10.22331/q-2025-11-17-1912 Recent experimental progress in controlling open quantum systems enables the pursuit of mixed-state nonequilibrium quantum phases. We investigate whether open quantum systems hosting mixed-state symmetry-protected topological states as steady states […]
Quantum 9, 1911 (2025). https://doi.org/10.22331/q-2025-11-17-1911 Quantum networks are important for quantum communication, enabling tasks such as quantum teleportation, quantum key distribution, quantum sensing, and quantum error correction, often utilizing graph states, a specific class of […]
Quantum 9, 1910 (2025). https://doi.org/10.22331/q-2025-11-14-1910 Consider an open quantum system with (discrete-time) Markovian dynamics. Our task is to store information in the system in such a way that it can be retrieved perfectly, even after […]
Quantum 9, 1909 (2025). https://doi.org/10.22331/q-2025-11-14-1909 Zero-noise extrapolation (ZNE) is a widely used quantum error mitigation technique that artificially amplifies circuit noise and then extrapolates the results to the noise-free circuit. A common ZNE approach is […]
Quantum 9, 1908 (2025). https://doi.org/10.22331/q-2025-11-06-1908 We show that all reduced states of nonproduct symmetric Dicke states of arbitrary number of qudits are genuinely multipartite entangled, and of nonpositive partial transpose with respect to any subsystem. […]
Quantum 9, 1907 (2025). https://doi.org/10.22331/q-2025-11-06-1907 We give a pair of algorithms that efficiently learn a quantum state prepared by Clifford gates and $O(log n)$ non-Clifford gates. Specifically, for an $n$-qubit state $|psirangle$ prepared with at […]
Quantum 9, 1906 (2025). https://doi.org/10.22331/q-2025-11-06-1906 We present Noise-Directed Adaptive Remapping (NDAR), a heuristic algorithm for approximately solving binary optimization problems by leveraging certain types of noise. We consider access to a noisy quantum processor with […]
Quantum 9, 1905 (2025). https://doi.org/10.22331/q-2025-11-06-1905 Quantum error-correcting codes, such as subspace, subsystem, and Floquet codes, are typically constructed within the stabilizer formalism, which does not fully capture the idea of fault tolerance needed for practical […]
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