Quantum 5, 419 (2021). https://doi.org/10.22331/q-2021-03-23-419 We define the type-independent resource theory of local operations and shared entanglement (LOSE). This allows us to formally quantify postquantumness in common-cause scenarios such as the Bell scenario. Any nonsignaling […]
Quantum 5, 418 (2021). https://doi.org/10.22331/q-2021-03-23-418 Self-testing protocols are methods to determine the presence of shared entangled states in a device independent scenario, where no assumptions on the measurements involved in the protocol are made. A […]
Quantum 5, 417 (2021). https://doi.org/10.22331/q-2021-03-23-417 Here we study the comparative power of classical and quantum learners for generative modelling within the Probably Approximately Correct (PAC) framework. More specifically we consider the following task: Given samples […]
Quantum 5, 416 (2021). https://doi.org/10.22331/q-2021-03-23-416 Today’s most widely used method of encoding quantum information in optical qubits is the dual-rail basis, often carried out through the polarisation of a single photon. On the other hand, […]
Quantum 5, 415 (2021). https://doi.org/10.22331/q-2021-03-22-415 Quantum computing systems need to be benchmarked in terms of practical tasks they would be expected to do. Here, we propose 3 “application-motivated” circuit classes for benchmarking: deep (relevant for […]
Quantum 5, 414 (2021). https://doi.org/10.22331/q-2021-03-17-414 Quantum measurement is a basic tool to manifest intrinsic quantum effects from fundamental tests to quantum information applications. While a measurement is typically performed to gain information on a quantum […]
Quantum 5, 413 (2021). https://doi.org/10.22331/q-2021-03-16-413 We introduce an approximate description of an $N$-qubit state, which contains sufficient information to estimate the expectation value of any observable to a precision that is upper bounded by the […]
Quantum 5, 412 (2021). https://doi.org/10.22331/q-2021-03-15-412 We consider the task of breaking down a quantum computation given as an isometry into C-NOTs and single-qubit gates, while keeping the number of C-NOT gates small. Although several decompositions […]
Quantum 5, 411 (2021). https://doi.org/10.22331/q-2021-03-15-411 Passivity is a fundamental concept that constitutes a necessary condition for any quantum system to attain thermodynamic equilibrium, and for a notion of temperature to emerge. While extensive work has […]
Quantum 5, 410 (2021). https://doi.org/10.22331/q-2021-03-15-410 Tensor networks represent the state-of-the-art in computational methods across many disciplines, including the classical simulation of quantum many-body systems and quantum circuits. Several applications of current interest give rise to […]
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