Quantum 5, 513 (2021). https://doi.org/10.22331/q-2021-07-28-513 This paper proposes a highly efficient quantum algorithm for portfolio optimisation targeted at near-term noisy intermediate-scale quantum computers. Recent work by Hodson et al. (2019) explored potential application of hybrid […]
Quantum 5, 512 (2021). https://doi.org/10.22331/q-2021-07-28-512 We introduce a novel hybrid algorithm to simulate the real-time evolution of quantum systems using parameterized quantum circuits. The method, named “projected – Variational Quantum Dynamics” (p-VQD) realizes an iterative, […]
Quantum 5, 511 (2021). https://doi.org/10.22331/q-2021-07-28-511 The causal structure of a unitary transformation is the set of relations of possible influence between any input subsystem and any output subsystem. We study whether such causal structure can […]
Quantum 5, 510 (2021). https://doi.org/10.22331/q-2021-07-27-510 We present a general framework for modifying quantum approximate optimization algorithms (QAOA) to solve constrained network flow problems. By exploiting an analogy between flow-constraints and Gauss’ law for electromagnetism, we […]
The ultimate goal of the Internet of Things (IoT) is to build computing capabilities into every object in the world, but that’s a pipe dream with today’s chips. Now British chip designer Arm thinks it […]
Quantum 5, 509 (2021). https://doi.org/10.22331/q-2021-07-26-509 The ability to simulate a fermionic system on a quantum computer is expected to revolutionize chemical engineering, materials design, nuclear physics, to name a few. Thus, optimizing the simulation circuits […]
Quantum 5, 508 (2021). https://doi.org/10.22331/q-2021-07-22-508 In general relativity, the description of spacetime relies on idealised rods and clocks, which identify a reference frame. In any concrete scenario, reference frames are associated to physical systems, which […]
Quantum 5, 507 (2021). https://doi.org/10.22331/q-2021-07-20-507 There has been an intense debate on the question as to whether a quanton, passing through a double-slit, experiences a ‘momentum kick’ due to the act of which-way detection. There […]
One of the biggest barriers standing in the way of useful quantum computers is how error-prone today’s devices are. Now, Google has provided an experimental demonstration of how to correct this problem and scale it […]
Quantum 5, 506 (2021). https://doi.org/10.22331/q-2021-07-19-506 Rutherford scattering is usually described by treating the projectile either classically or as quantum mechanical plane waves. Here we treat them as wave packets and study their head-on collisions with […]
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