Quantum 6, 789 (2022). https://doi.org/10.22331/q-2022-09-01-789 We present classical and quantum algorithms for approximating partition functions of classical Hamiltonians at a given temperature. Our work has two main contributions: first, we modify the classical algorithm of […]
Quantum 6, 788 (2022). https://doi.org/10.22331/q-2022-08-25-788 The capacity of distant parties to send signals to one another is a fundamental requirement in many information-processing tasks. Such ability is determined by the causal structure connecting the parties, […]
Quantum 6, 787 (2022). https://doi.org/10.22331/q-2022-08-24-787 The Andreev-Bashkin effect, or superfluid drag, is predicted in a system of Bose-condensed excitonic polaritons in optical microcavity coupled by electron-exciton interaction with a superconducting layer. Two possible setups with […]
Quantum 6, 786 (2022). https://doi.org/10.22331/q-2022-08-24-786 Topological quantum computations are built on a foundation of two basic tasks: preserving logical observables through time and moving logical observables through space. Memory experiments, which check how well logical […]
Quantum 6, 785 (2022). https://doi.org/10.22331/q-2022-08-24-785 The notorious quantum measurement problem brings out the difficulty to reconcile two quantum postulates: the unitary evolution of closed quantum systems and the wave-function collapse after a measurement. This problematics […]
Quantum 6, 784 (2022). https://doi.org/10.22331/q-2022-08-23-784 Recently, Renes proposed a quantum algorithm called belief propagation with quantum messages (BPQM) for decoding classical data encoded using a binary linear code with tree Tanner graph that is transmitted […]
Quantum 6, 783 (2022). https://doi.org/10.22331/q-2022-08-23-783 Open-air microwave quantum communication and metrology protocols must be able to transfer quantum resources from a cryostat, where they are created, to an environment dominated by thermal noise. Indeed, the […]
Quantum 6, 782 (2022). https://doi.org/10.22331/q-2022-08-23-782 Parameterized quantum circuits (PQCs) are a central component of many variational quantum algorithms, yet there is a lack of understanding of how their parameterization impacts algorithm performance. We initiate this […]
Quantum 6, 781 (2022). https://doi.org/10.22331/q-2022-08-22-781 We present a new hybrid, local search algorithm for quantum approximate optimization of constrained combinatorial optimization problems. We focus on the Maximum Independent Set problem and demonstrate the ability of […]
Quantum 6, 780 (2022). https://doi.org/10.22331/q-2022-08-17-780 Conventional methods of quantum simulation involve trade-offs that limit their applicability to specific contexts where their use is optimal. In particular, the interaction picture simulation has been found to provide […]
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