Quantum 5, 600 (2021). https://doi.org/10.22331/q-2021-12-07-600 Completely positive and trace-preserving maps characterize physically implementable quantum operations. On the other hand, general linear maps, such as positive but not completely positive maps, which can not be physically […]
Quantum 5, 599 (2021). https://doi.org/10.22331/q-2021-12-06-599 Incompatible observables underlie pillars of quantum physics such as contextuality and entanglement. The Heisenberg uncertainty principle is a fundamental limitation on the measurement of the product of incompatible observables, a […]
Quantum 5, 598 (2021). https://doi.org/10.22331/q-2021-12-06-598 We demonstrate characterizing quantum evolutions via matrix factorization algorithm, a particular type of the recommender system (RS). A system undergoing a quantum evolution can be characterized in several ways. Here […]
Quantum 5, 597 (2021). https://doi.org/10.22331/q-2021-12-06-597 We show a superpolynomial oracle separation between the power of adiabatic quantum computation with no sign problem and the power of classical computation. Click to rate this post! [Total: 0 […]
Quantum 5, 596 (2021). https://doi.org/10.22331/q-2021-12-02-596 Variational quantum eigensolvers (VQEs) are a promising class of quantum algorithms for preparing approximate ground states in near-term quantum devices. Minimizing the error in such an approximation requires designing ansatzes […]
Quantum 5, 595 (2021). https://doi.org/10.22331/q-2021-12-02-595 In order to build a large scale quantum computer, one must be able to correct errors extremely fast. We design a fast decoding algorithm for topological codes to correct for […]
Quantum 5, 594 (2021). https://doi.org/10.22331/q-2021-11-29-594 Spontaneous collapse models and Bohmian mechanics are two different solutions to the measurement problem plaguing orthodox quantum mechanics. They have, a priori nothing in common. At a formal level, collapse […]
Quantum 5, 593 (2021). https://doi.org/10.22331/q-2021-11-29-593 The construction of Bell inequalities based on Platonic and Archimedean solids (Quantum 4 (2020), 293) is generalized to the case of orbits generated by the action of some finite groups. […]
Quantum 5, 592 (2021). https://doi.org/10.22331/q-2021-11-26-592 Achieving near-term quantum advantage will require accurate estimation of quantum observables despite significant hardware noise. For this purpose, we propose a novel, scalable error-mitigation method that applies to gate-based quantum […]
Quantum 5, 591 (2021). https://doi.org/10.22331/q-2021-11-25-591 We investigate the interplay between Aharonov-Bohm (AB) caging and topological protection in a family of quasi-one-dimensional topological insulators, which we term CSSH ladders. Hybrids of the Creutz ladder and the […]
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