Quantum 10, 2050 (2026). https://doi.org/10.22331/q-2026-04-01-2050 We propose a class of metrological resource states whose quantum Fisher information scales optimally in both system size and noise rate. In these states, qubits are partitioned into sensing groups […]
Quantum 10, 2049 (2026). https://doi.org/10.22331/q-2026-04-01-2049 The conditional disclosure of secrets (CDS) setting is among the most basic primitives studied in information-theoretic cryptography. Motivated by a connection to non-local quantum computation and position-based cryptography, CDS with […]
Quantum 10, 2048 (2026). https://doi.org/10.22331/q-2026-03-27-2048 Quantum signal processing and quantum singular value transformation are powerful tools to implement polynomial transformations of block-encoded matrices on quantum computers, and has achieved asymptotically optimal complexity in many prominent […]
Quantum 10, 2047 (2026). https://doi.org/10.22331/q-2026-03-27-2047 In quantum mechanics, the Schrieffer–Wolff (SW) transformation (also called quasi-degenerate perturbation theory) is known as an approximative method to reduce the dimension of the Hamiltonian. We present a geometric interpretation […]
Quantum 10, 2046 (2026). https://doi.org/10.22331/q-2026-03-24-2046 Locality is a central notion in modern physics, but different disciplines understand it in different ways. Quantum field theory focuses on relativistic locality, based on spacetime regions, while quantum information […]
Quantum 10, 2045 (2026). https://doi.org/10.22331/q-2026-03-24-2045 We present a method to suppress crosstalk from implementing controlled-Z gates via local addressing in neutral atom quantum computers. In these systems, a fraction of the laser light that is […]
Quantum 10, 2044 (2026). https://doi.org/10.22331/q-2026-03-24-2044 Security analyses in quantum key distribution (QKD) and other adversarial quantum tasks often assume perfect device models. However, real-world implementations often deviate from these models. Thus, it is important to […]
Quantum 10, 2043 (2026). https://doi.org/10.22331/q-2026-03-24-2043 The Chantasri-Dressel-Jordan (CDJ) stochastic path integral formalism (Chantasri et al. 2013 and 2015) characterizes the statistics of the readouts and the most likely conditional evolution of continuously monitored quantum systems […]
Quantum 10, 2042 (2026). https://doi.org/10.22331/q-2026-03-24-2042 Current proposals to probe the quantum nature of gravity in the low-energy regime predominantly focus on the Newtonian interaction term. In this work, we present a theoretical exploration of gravitationally […]
Quantum 10, 2041 (2026). https://doi.org/10.22331/q-2026-03-23-2041 Quantum algorithms for linear systems produce the solution state $A^{-1}|brangle$ by querying two oracles: $O_A$ that block encodes the coefficient matrix and $O_b$ that prepares the initial state. We present […]
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