Quantum 6, 687 (2022). https://doi.org/10.22331/q-2022-04-13-687 We study the correlation clustering problem using the quantum approximate optimization algorithm (QAOA) and qudits, which constitute a natural platform for such non-binary problems. Specifically, we consider a neutral atom […]
Quantum 6, 686 (2022). https://doi.org/10.22331/q-2022-04-13-686 Quantum coupling between mechanical oscillators and atomic gases generating entanglement has been recently experimentally demonstrated using their subsequent interaction with light. The next step is to build a hybrid atom-mechanical […]
Quantum 6, 685 (2022). https://doi.org/10.22331/q-2022-04-13-685 Fluctuation theorems allow one to make generalised statements about the behaviour of thermodynamic quantities in systems that are driven far from thermal equilibrium. In this article we use Crooks’ fluctuation […]
Quantum 6, 684 (2022). https://doi.org/10.22331/q-2022-04-13-684 Strong coupling regime takes place in open hybrid systems consisting of two or more physical subsystems when the coupling strength between subsystems exceeds the relaxation rate. The relaxation arises due […]
Quantum 6, 683 (2022). https://doi.org/10.22331/q-2022-04-07-683 Uncertainty relations play a crucial role in quantum mechanics. Well-defined methods exist for the derivation of such uncertainties for pairs of observables. Other approaches also allow the formulation of time-energy […]
Quantum 6, 682 (2022). https://doi.org/10.22331/q-2022-04-06-682 Periodically-driven systems are ubiquitous in science and technology. In quantum dynamics, even a small number of periodically-driven spins leads to complicated dynamics. Hence, it is of interest to understand what […]
Quantum 6, 681 (2022). https://doi.org/10.22331/q-2022-04-04-681 We develop a systematic procedure to quantise canonically Hamiltonians of light-matter models of transmission lines coupled through lumped linear lossless ideal nonreciprocal elements, that break time-reversal symmetry, in a circuit […]
Quantum 6, 680 (2022). https://doi.org/10.22331/q-2022-04-04-680 We consider the problem of continuous quantum error correction from a Bayesian perspective, proposing a pair of digital filters using logarithmic probabilities that are able to achieve near-optimal performance on […]
Quantum 6, 679 (2022). https://doi.org/10.22331/q-2022-03-31-679 This work analyses the performance of quantum circuits and general processes to transform $k$ uses of an arbitrary unitary operation $U$ into another unitary operation $f(U)$. When the desired function […]
Quantum 6, 678 (2022). https://doi.org/10.22331/q-2022-03-30-678 We show how to apply the recursive quantum approximate optimization algorithm (RQAOA) to MAX-$k$-CUT, the problem of finding an approximate $k$-vertex coloring of a graph. We compare this proposal to […]
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