Quantum 8, 1438 (2024). https://doi.org/10.22331/q-2024-08-13-1438 The Krylov subspace methods, being one category of the most important classical numerical methods for linear algebra problems, can be much more powerful when generalised to quantum computing. However, quantum […]
Quantum 8, 1437 (2024). https://doi.org/10.22331/q-2024-08-13-1437 Assessment of practical quantum information processing (QIP) remains partial without understanding limits imposed by noise. Unfortunately, mere description of noise grows exponentially with system size, becoming cumbersome even for modest […]
Quantum 8, 1436 (2024). https://doi.org/10.22331/q-2024-08-12-1436 With the advent of quantum technology, the interest in communication tasks assisted by quantum systems has increased both in academia and industry. Nonetheless, the transmission of a quantum state in […]
Quantum 8, 1435 (2024). https://doi.org/10.22331/q-2024-08-08-1435 Measurement-device-independent quantum key distribution (MDI-QKD) closes all the security loopholes in the detection system and is a promising solution for secret key sharing. Polarization encoding is the most common QKD […]
Quantum 8, 1434 (2024). https://doi.org/10.22331/q-2024-08-08-1434 The Hayden-Preskill protocol probes the capability of information recovery from local subsystems after unitary dynamics. As such it resolves the capability of quantum many-body systems to dynamically implement a quantum […]
Quantum 8, 1433 (2024). https://doi.org/10.22331/q-2024-08-08-1433 We consider the tasks of learning quantum states, measurements and channels generated by continuous-variable (CV) quantum circuits. This family of circuits is suited to describe optical quantum technologies and in […]
Quantum 8, 1432 (2024). https://doi.org/10.22331/q-2024-08-07-1432 The entanglement level statistics of a quantum state have recently been proposed to be a signature of universality in the underlying quantum circuit. This is a consequence of level repulsion […]
Quantum 8, 1431 (2024). https://doi.org/10.22331/q-2024-08-02-1431 Collective Rydberg excitations provide promising applications ranging from quantum information processing, and quantum computing to ultra-sensitive electrometry. However, their short lifetime is an immense obstacle in real-life scenarios. The state-of-the-art […]
Quantum 8, 1430 (2024). https://doi.org/10.22331/q-2024-08-02-1430 Long-range entangled states are vital for quantum information processing and quantum metrology. Preparing such states by combining measurements with unitary gates opened new possibilities for efficient protocols with finite-depth quantum […]
Quantum 8, 1429 (2024). https://doi.org/10.22331/q-2024-08-02-1429 We devise a new realization of the surface code on a rectangular lattice of qubits utilizing single-qubit and nearest-neighbor two-qubit Pauli measurements and three auxiliary qubits per plaquette. This realization […]
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