Quantum 5, 458 (2021). https://doi.org/10.22331/q-2021-05-26-458 We theoretically analyze the phase sensitivity of the Induced-Coherence (Mandel-Type) Interferometer, including the case where the sensitivity is “boosted” into the bright input regime with coherent-light seeding. We find scaling […]
Quantum 5, 457 (2021). https://doi.org/10.22331/q-2021-05-21-457 We introduce a general framework for analysing general probabilistic theories, which emphasises the distinction between the dynamical and probabilistic structures of a system. The dynamical structure is the set of […]
Quantum 5, 456 (2021). https://doi.org/10.22331/q-2021-05-14-456 We describe the $textit{contextual subspace variational quantum eigensolver}$ (CS-VQE), a hybrid quantum-classical algorithm for approximating the ground state energy of a Hamiltonian. The approximation to the ground state energy is […]
Quantum 5, 455 (2021). https://doi.org/10.22331/q-2021-05-10-455 A number of physically intuitive results for the calculation of multi-time correlations in phase-space representations of quantum mechanics are obtained. They relate time-dependent stochastic samples to multi-time observables, and rely […]
Increasingly, modern life depends on how skillfully we shuttle electrons through the nanoscale mazes etched on computer chips. These processors aren’t just for laptops anymore—they’re used in your car, your thermostat, your refrigerator and microwave. […]
Quantum 5, 454 (2021). https://doi.org/10.22331/q-2021-05-04-454 We propose and analyze a set of variational quantum algorithms for solving quadratic unconstrained binary optimization problems where a problem consisting of $n_c$ classical variables can be implemented on $mathcal […]
Quantum 5, 453 (2021). https://doi.org/10.22331/q-2021-05-04-453 It is well known that a quantum circuit on $N$ qubits composed of Clifford gates with the addition of $k$ non Clifford gates can be simulated on a classical computer […]
Quantum 5, 452 (2021). https://doi.org/10.22331/q-2021-05-04-452 Photon loss is destructive to the performance of quantum photonic devices and therefore suppressing the effects of photon loss is paramount to photonic quantum technologies. We present two schemes to […]
Quantum 5, 451 (2021). https://doi.org/10.22331/q-2021-05-01-451 Master equations are a vital tool to model heat flow through nanoscale thermodynamic systems. Most practical devices are made up of interacting sub-system, and are often modelled using either $textit{local}$ […]
Quantum 5, 450 (2021). https://doi.org/10.22331/q-2021-05-01-450 One of the key ingredients of many LOCC protocols in quantum information is a multiparticle (locally) maximally entangled quantum state, aka a critical state, that possesses local symmetries. We show […]
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