Quantum 7, 1149 (2023). https://doi.org/10.22331/q-2023-10-24-1149 We analyze the amount of classical communication required to reproduce the statistics of local projective measurements on a general pair of entangled qubits, $|Psi_{AB}rangle=sqrt{p} |00rangle+sqrt{1-p} |11rangle$ (with $1/2leq p leq […]
Quantum 7, 1148 (2023). https://doi.org/10.22331/q-2023-10-23-1148 Quantum-enhanced computing methods are promising candidates to solve currently intractable problems. We consider here a variational quantum eigensolver (VQE), that delegates costly state preparations and measurements to quantum hardware, while […]
Quantum 7, 1147 (2023). https://doi.org/10.22331/q-2023-10-23-1147 Circuit cutting, the decomposition of a quantum circuit into independent partitions, has become a promising avenue towards experiments with larger quantum circuits in the noisy-intermediate scale quantum (NISQ) era. While […]
Quantum 7, 1146 (2023). https://doi.org/10.22331/q-2023-10-19-1146 In measurement-based quantum computing (MBQC), computation is carried out by a sequence of measurements and corrections on an entangled state. Flow, and related concepts, are powerful techniques for characterising the […]
Quantum 7, 1145 (2023). https://doi.org/10.22331/q-2023-10-18-1145 Simulating fermionic systems on a quantum computer requires a high-performing mapping of fermionic states to qubits. A characteristic of an efficient mapping is its ability to translate local fermionic interactions […]
Quantum 7, 1144 (2023). https://doi.org/10.22331/q-2023-10-16-1144 Bose-condensation in a system of 2D quasiparticles is considered in the scope of a microscopic model. Mean-field dynamical equations are derived with the help of the Schwinger-Keldysh formalism and a […]
Quantum 7, 1143 (2023). https://doi.org/10.22331/q-2023-10-16-1143 We define the quantum Wasserstein distance such that the optimization of the coupling is carried out over bipartite separable states rather than bipartite quantum states in general, and examine its […]
Quantum 7, 1142 (2023). https://doi.org/10.22331/q-2023-10-16-1142 When gravity is sourced by a quantum system, there is tension between its role as the mediator of a fundamental interaction, which is expected to acquire nonclassical features, and its […]
Quantum 7, 1141 (2023). https://doi.org/10.22331/q-2023-10-16-1141 Gate-based universal quantum computation is formulated in terms of two types of operations: local single-qubit gates, which are typically easily implementable, and two-qubit entangling gates, whose faithful implementation remains one […]
Quantum 7, 1140 (2023). https://doi.org/10.22331/q-2023-10-16-1140 Simulating the real-time dynamics of lattice gauge theories, underlying the Standard Model of particle physics, is a notoriously difficult problem where quantum simulators can provide a practical advantage over classical […]
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