Quantum 5, 577 (2021). https://doi.org/10.22331/q-2021-11-15-577 We investigate the problem of fast-forwarding quantum evolution, whereby the dynamics of certain quantum systems can be simulated with gate complexity that is sublinear in the evolution time. We provide […]
Quantum 5, 576 (2021). https://doi.org/10.22331/q-2021-11-11-576 We analyse the problem of transmitting a number of unknown quantum states or one composite system in one go. We derive a lower bound on the performance of such process, […]
Quantum 5, 575 (2021). https://doi.org/10.22331/q-2021-11-11-575 Reasoning about Bell nonlocality from the correlations observed in post-selected data is always a matter of concern. This is because conditioning on the outcomes is a source of non-causal correlations, […]
Quantum 5, 574 (2021). https://doi.org/10.22331/q-2021-11-10-574 Quantum computers can produce a quantum encoding of the solution of a system of differential equations exponentially faster than a classical algorithm can produce an explicit description. However, while high-precision […]
When it comes to brain computing, timing is everything. It’s how neurons wire up into circuits. It’s how these circuits process highly complex data, leading to actions that can mean life or death. It’s how […]
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 […]
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