Quantum 7, 911 (2023). https://doi.org/10.22331/q-2023-02-02-911 The problem of computing the local hidden variable (LHV) value of a Bell inequality plays a central role in the study of quantum nonlocality. In particular, this problem is the […]
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Quantum 7, 910 (2023). https://doi.org/10.22331/q-2023-02-02-910 The sign structure of quantum states is closely connected to quantum phases of matter, yet detecting such fine-grained properties of amplitudes is subtle. Here we employ as a diagnostic measurement-induced […]
We speak at a rate of roughly 160 words every minute. That speed is incredibly difficult to achieve for speech brain implants. Decades in the making, speech implants use tiny electrode arrays inserted into the […]
Quantum 7, 909 (2023). https://doi.org/10.22331/q-2023-01-26-909 We introduce a variational quantum algorithm to solve unconstrained black box binary optimization problems, i.e., problems in which the objective function is given as black box. This is in contrast […]
Quantum 7, 908 (2023). https://doi.org/10.22331/q-2023-01-26-908 This work studies pulse based variational quantum algorithms (VQAs), which are designed to determine the ground state of a quantum mechanical system by combining classical and quantum hardware. In contrast […]
Quantum 7, 907 (2023). https://doi.org/10.22331/q-2023-01-26-907 We investigate nonlocal quantum correlations arising between multiple two-level impurity atoms coupled to an ultracold bosonic gas. We find that the environment-induced dynamics of the impurity subsystem can generate nonlocal […]
Quantum 7, 906 (2023). https://doi.org/10.22331/q-2023-01-26-906 The accurate estimation of quantum observables is a critical task in science. With progress on the hardware, measuring a quantum system will become increasingly demanding, particularly for variational protocols that […]
Quantum 7, 905 (2023). https://doi.org/10.22331/q-2023-01-26-905 Learning the unknown Hamiltonian governing the dynamics of a quantum many-body system is a challenging task. In this manuscript, we propose a possible strategy based on repeated measurements on a […]
Quantum 7, 904 (2023). https://doi.org/10.22331/q-2023-01-24-904 We consider a system of multiple qubits without any quantum control. We show that one can mediate entanglement between different subsystems in a controlled way by adding a (locally) controlled […]
Google is one of the biggest companies on Earth. Google’s search engine is the front door to the internet. And according to recent reports, Google is scrambling. Late last year, OpenAI, an artificial intelligence company […]
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