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 […]
Quantum 8, 1428 (2024). https://doi.org/10.22331/q-2024-07-30-1428 We analyze the efficiency of protocols for adiabatic quantum state transfer assisted by an engineered reservoir. The target dynamics is a quantum trajectory in the Hilbert space and is a […]
Quantum 8, 1427 (2024). https://doi.org/10.22331/q-2024-07-30-1427 Quantum systems of infinite dimension, such as bosonic oscillators, provide vast resources for quantum sensing. Yet, a general theory on how to manipulate such bosonic modes for sensing beyond parameter […]
Quantum 8, 1426 (2024). https://doi.org/10.22331/q-2024-07-30-1426 We present a general denoising algorithm for performing $textit{simultaneous tomography}$ of quantum states and measurement noise. This algorithm allows us to fully characterize state preparation and measurement (SPAM) errors present […]
Quantum 8, 1425 (2024). https://doi.org/10.22331/q-2024-07-25-1425 Tensor networks, widely used for providing efficient representations of low-energy states of local quantum many-body systems, have been recently proposed as machine learning architectures which could present advantages with respect […]
Quantum 8, 1424 (2024). https://doi.org/10.22331/q-2024-07-25-1424 The Trotter product formula and the quantum Zeno effect are both indispensable tools for constructing time-evolutions using experimentally feasible building blocks. In this work, we discuss assumptions under which quantitative […]
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