Quantum 8, 1260 (2024). https://doi.org/10.22331/q-2024-02-20-1260 Quantum dynamics with local interactions in lattice models display rich physics, but is notoriously hard to study. Dual-unitary circuits allow for exact answers to interesting physical questions in clean or […]
Quantum 8, 1259 (2024). https://doi.org/10.22331/q-2024-02-20-1259 Conical intersections are topologically protected crossings between the potential energy surfaces of a molecular Hamiltonian, known to play an important role in chemical processes such as photoisomerization and non-radiative relaxation. […]
Quantum 8, 1258 (2024). https://doi.org/10.22331/q-2024-02-19-1258 Quantum circuits must run on quantum computers with tight limits on qubit and gate counts. To generate circuits respecting both limits, a promising opportunity is exploiting $uncomputation$ to trade qubits […]
Quantum 8, 1257 (2024). https://doi.org/10.22331/q-2024-02-15-1257 We propose a novel deterministic method for preparing arbitrary quantum states. When our protocol is compiled into CNOT and arbitrary single-qubit gates, it prepares an $N$-dimensional state in depth $O(log(N))$ […]
Quantum 8, 1256 (2024). https://doi.org/10.22331/q-2024-02-15-1256 Quantum technologies have matured to the point that we can test fundamental quantum phenomena under extreme conditions. Specifically, entanglement, a cornerstone of modern quantum information theory, can be robustly produced […]
Quantum 8, 1255 (2024). https://doi.org/10.22331/q-2024-02-14-1255 In quantum theory, a measurement context is defined by an orthogonal basis in a Hilbert space, where each basis vector represents a specific measurement outcome. The precise quantitative relation between […]
Quantum 8, 1254 (2024). https://doi.org/10.22331/q-2024-02-13-1254 By exploiting the link between time-independent Hamiltonians and thermalisation, heuristic predictions on the performance of continuous-time quantum walks for MAX-CUT are made. The resulting predictions depend on the number of […]
Quantum 8, 1253 (2024). https://doi.org/10.22331/q-2024-02-13-1253 We propose a new design heuristic to tackle combinatorial optimisation problems, inspired by Hamiltonians for optimal state-transfer. The result is a rapid approximate optimisation algorithm. We provide numerical evidence of […]
Quantum 8, 1252 (2024). https://doi.org/10.22331/q-2024-02-13-1252 Emerging quantum hardware provides new possibilities for quantum simulation. While much of the research has focused on simulating closed quantum systems, the real-world quantum systems are mostly open. Therefore, it […]
Quantum 8, 1251 (2024). https://doi.org/10.22331/q-2024-02-12-1251 A general quantum circuit can be simulated classically in exponential time. If it has a planar layout, then a tensor-network contraction algorithm due to Markov and Shi has a runtime […]
Recent Comments