Quantum 9, 1785 (2025). https://doi.org/10.22331/q-2025-07-03-1785 We explore the performance of the metrology scheme by employing a quantum time flip during encoding, a specific case of processes with indefinite time direction, which we refer to as […]
Quantum 9, 1784 (2025). https://doi.org/10.22331/q-2025-07-03-1784 Direct fidelity estimation is a protocol that estimates the fidelity between an experimental quantum state and a target pure state. By measuring the expectation values of Pauli operators selected through […]
Dear Quantum Community, We wanted to provide an update and announce a new attempt to improve the quality of peer review procedures in Quantum. TL;DR: from now on, instead of having regular editorial calls, we […]
Quantum 9, 1783 (2025). https://doi.org/10.22331/q-2025-06-24-1783 In this study, we explore the information capacity of open quantum systems, focusing on the effective channels formed by the subsystem of random quantum circuits and quantum Hamiltonian evolution. By […]
Quantum 9, 1782 (2025). https://doi.org/10.22331/q-2025-06-24-1782 Stabilizer states, which are also known as the Clifford states, have been commonly utilized in quantum information, quantum error correction, and quantum circuit simulation due to their simple mathematical structure. […]
Quantum 9, 1781 (2025). https://doi.org/10.22331/q-2025-06-24-1781 The dynamics of a quantum-many body system subject to measurements is naturally described by an ensemble of quantum trajectories, which can feature measurement-induced phase transitions (MIPTs). This phenomenon cannot be […]
Quantum 9, 1780 (2025). https://doi.org/10.22331/q-2025-06-24-1780 Weak coin flipping is a cryptographic primitive in which two mutually distrustful parties generate a shared random bit to agree on a winner via remote communication. While a stand-alone secure […]
Quantum 9, 1779 (2025). https://doi.org/10.22331/q-2025-06-24-1779 Fault-tolerant architectures aim to reduce the noise of a quantum computation. Despite such architectures being well studied a detailed understanding of how noise is transformed in a fault-tolerant primitive such […]
Quantum 9, 1778 (2025). https://doi.org/10.22331/q-2025-06-24-1778 Fermionic Hamiltonians play a critical role in quantum chemistry, one of the most promising use cases for near-term quantum computers. However, since encoding nonlocal fermionic statistics using conventional qubits results […]
Quantum 9, 1777 (2025). https://doi.org/10.22331/q-2025-06-23-1777 Given a classical query algorithm as a decision tree, when does there exist a quantum query algorithm with a speed-up over the classical one? We provide a general construction based […]
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