Quantum 7, 1128 (2023). https://doi.org/10.22331/q-2023-10-09-1128 Recent work has revealed the central role played by the Kirkwood-Dirac quasiprobability (KDQ) as a tool to properly account for non-classical features in the context of condensed matter physics (scrambling, […]
Quantum 7, 1127 (2023). https://doi.org/10.22331/q-2023-10-03-1127 Modeling stochastic phenomena in continuous time is an essential yet challenging problem. Analytic solutions are often unavailable, and numerical methods can be prohibitively time-consuming and computationally expensive. To address this […]
Quantum 7, 1126 (2023). https://doi.org/10.22331/q-2023-10-03-1126 Pauli-based computation (PBC) is driven by a sequence of adaptively chosen, non-destructive measurements of Pauli observables. Any quantum circuit written in terms of the Clifford+$T$ gate set and having $t$ […]
Quantum 7, 1125 (2023). https://doi.org/10.22331/q-2023-10-03-1125 Information capacity enhancement through the coherent control of channels has attracted much attention of late, with work exploring the effect of coherent control of channel causal orders, channel superpositions, and […]
One of the most well-established and disruptive uses for a future quantum computer is the ability to crack encryption. A new algorithm could significantly lower the barrier to achieving this. Despite all the hype around […]
Quantum 7, 1124 (2023). https://doi.org/10.22331/q-2023-09-26-1124 Non-Markovian dynamics are characterized by information backflows, where the evolving open quantum system retrieves part of the information previously lost in the environment. Hence, the very definition of non-Markovianity implies […]
Quantum 7, 1123 (2023). https://doi.org/10.22331/q-2023-09-26-1123 A common approach to studying the performance of quantum error correcting codes is to assume independent and identically distributed single-qubit errors. However, the available experimental data shows that realistic errors […]
Quantum 7, 1122 (2023). https://doi.org/10.22331/q-2023-09-26-1122 Recently, a class of fractal surface codes (FSCs), has been constructed on fractal lattices with Hausdorff dimension $2+epsilon$, which admits a fault-tolerant non-Clifford CCZ gate [1]. We investigate the performance […]
Quantum 7, 1121 (2023). https://doi.org/10.22331/q-2023-09-26-1121 We generalize the Quantum Approximate Optimization Algorithm (QAOA) of Farhi et al. (2014) to allow for arbitrary separable initial states with corresponding mixers such that the starting state is the […]
Quantum 7, 1120 (2023). https://doi.org/10.22331/q-2023-09-25-1120 Symmetry is a unifying concept in physics. In quantum information and beyond, it is known that quantum states possessing symmetry are not useful for certain information-processing tasks. For example, states […]
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