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 […]
Quantum 9, 1776 (2025). https://doi.org/10.22331/q-2025-06-18-1776 Despite significant advances in quantum algorithms, quantum programs in practice are often expressed at the circuit level, forgoing helpful structural abstractions common to their classical counterparts. Consequently, as many quantum […]
Quantum 9, 1775 (2025). https://doi.org/10.22331/q-2025-06-18-1775 Different choices of quantum error-correcting codes can reduce the demands on the physical hardware needed to build a quantum computer. To achieve the full potential of a code, we must […]
Quantum 9, 1774 (2025). https://doi.org/10.22331/q-2025-06-17-1774 We propose a quantum state distance and develop a family of geometrical quantum speed limits (QSLs) for open and closed systems. The QSL time includes an alternative function by which […]
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