Quantum 6, 869 (2022). https://doi.org/10.22331/q-2022-12-07-869 What is the minimum time required to take a temperature? In this paper, we solve this question for a large class of processes where temperature is inferred by measuring a […]
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Wormholes might sound like something that belongs in a Star Trek episode rather than a research paper, but scientists just simulated one on Google’s Sycamore quantum computer. The result suggests these devices could be used […]
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Quantum 6, 868 (2022). https://doi.org/10.22331/q-2022-12-01-868 The rapid progress in the development of quantum devices is in large part due to the availability of a wide range of characterization techniques allowing to probe, test and adjust […]
Quantum 6, 867 (2022). https://doi.org/10.22331/q-2022-12-01-867 We study the classical simulatability of Gottesman-Kitaev-Preskill (GKP) states in combination with arbitrary displacements, a large set of symplectic operations and homodyne measurements. For these types of circuits, neither continuous-variable […]
Quantum 6, 866 (2022). https://doi.org/10.22331/q-2022-12-01-866 Quantum fully homomorphic encryption (QFHE) allows to evaluate quantum circuits on encrypted data. We present a novel QFHE scheme, which extends Pauli one-time pad encryption by relying on the quaternion […]
Quantum 6, 865 (2022). https://doi.org/10.22331/q-2022-11-28-865 One of the key ways in which quantum mechanics differs from relativity is that it requires a fixed background reference frame for spacetime. In fact, this appears to be one […]
Quantum 6, 864 (2022). https://doi.org/10.22331/q-2022-11-28-864 Does gravity constrain computation? We study this question using the AdS/CFT correspondence, where computation in the presence of gravity can be related to non-gravitational physics in the boundary theory. In […]
Quantum 6, 863 (2022). https://doi.org/10.22331/q-2022-11-28-863 Gaussian boson sampling is a model of photonic quantum computing that has attracted attention as a platform for building quantum devices capable of performing tasks that are out of reach […]
Quantum 6, 862 (2022). https://doi.org/10.22331/q-2022-11-28-862 The data processing inequality is the most basic requirement for any meaningful measure of information. It essentially states that distinguishability measures between states decrease if we apply a quantum channel […]
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