Quantum 5, 573 (2021). https://doi.org/10.22331/q-2021-11-08-573 Quantum algorithms for solving the Quantum Linear System (QLS) problem are among the most investigated quantum algorithms of recent times, with potential applications including the solution of computationally intractable differential […]
Quantum 5, 572 (2021). https://doi.org/10.22331/q-2021-11-08-572 Variational quantum algorithms (VQA) are considered as some of the most promising methods to determine the properties of complex strongly correlated quantum many-body systems, especially from the perspective of devices […]
Quantum 5, 571 (2021). https://doi.org/10.22331/q-2021-11-08-571 The problem of objectivity, i.e. how to explain on quantum grounds the objective character of the macroscopic world, is one of the aspects of the celebrated quantum-to-classical transition. Initiated by […]
Quantum 5, 570 (2021). https://doi.org/10.22331/q-2021-11-02-570 Inspired by recent developments in the control and manipulation of quantum dot nuclear spins, which allow for the transfer of an electron spin state to the surrounding nuclear-spin ensemble for […]
As Moore’s Law slows, people are starting to look for alternatives to the silicon chips we’ve long been reliant on. A new optical switch up to 1,000 times faster than normal transistors could one day […]
Quantum 5, 569 (2021). https://doi.org/10.22331/q-2021-10-27-569 Sharing correlated random variables is a resource for a number of information theoretic tasks such as privacy amplification, simultaneous message passing, secret sharing and many more. In this article, we […]
Quantum 5, 568 (2021). https://doi.org/10.22331/q-2021-10-27-568 The fermionic quantum emulator (FQE) is a collection of protocols for emulating quantum dynamics of fermions efficiently taking advantage of common symmetries present in chemical, materials, and condensed-matter systems. The […]
Quantum 5, 567 (2021). https://doi.org/10.22331/q-2021-10-20-567 The Quantum Fisher Information matrix (QFIM) is a central metric in promising algorithms, such as Quantum Natural Gradient Descent and Variational Quantum Imaginary Time Evolution. Computing the full QFIM for […]
Quantum 5, 566 (2021). https://doi.org/10.22331/q-2021-10-19-566 We consider performing phase estimation under the following conditions: we are given only one copy of the input state, the input state does not have to be an eigenstate of […]
Quantum 5, 565 (2021). https://doi.org/10.22331/q-2021-10-19-565 Photonic cluster states are a powerful resource for measurement-based quantum computing and loss-tolerant quantum communication. Proposals to generate multi-dimensional lattice cluster states have identified coupled spin-photon interfaces, spin-ancilla systems, and […]
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