Quantum 9, 1651 (2025). https://doi.org/10.22331/q-2025-02-26-1651 A key conjecture about the evolution of complex quantum systems towards an ergodic steady state, known as scrambling, is that this process acquires universal features when it is most efficient. […]
Quantum 9, 1650 (2025). https://doi.org/10.22331/q-2025-02-26-1650 The fascinating concept of coherent quantum absorber – which can absorb any photon emitted by another system while maintaining entanglement with that system – has found diverse implications in open […]
Quantum 9, 1649 (2025). https://doi.org/10.22331/q-2025-02-26-1649 The matrix rank and its positive versions are robust for small approximations, i.e. they do not decrease under small perturbations. In contrast, the multipartite tensor rank can collapse for arbitrarily […]
Quantum 9, 1648 (2025). https://doi.org/10.22331/q-2025-02-26-1648 We study Heisenberg scaling of quantum metrology in the viewpoint of population coding. Although Fisher information has been used for a figure of merit to characterize Heisenberg scaling in quantum […]
Quantum 9, 1647 (2025). https://doi.org/10.22331/q-2025-02-26-1647 In this paper we study single qutrit circuits consisting of words over the Clifford$+mathcal{D}$ cyclotomic gate set, where $mathcal{D}=text{diag}(pmxi^{a},pmxi^{b},pmxi^{c})$, $xi$ is a primitive $9$-th root of unity and $a,b,c$ are […]
Quantum 9, 1646 (2025). https://doi.org/10.22331/q-2025-02-26-1646 Quantum non-Markovianity in tripartite quantum states $rho_{ABC}$ represents a correlation between systems $A$ and $C$ when conditioned on the system $B$ and is known to have both classical and quantum […]
Quantum 9, 1645 (2025). https://doi.org/10.22331/q-2025-02-25-1645 Matrix-product unitaries (MPU) are 1D tensor networks describing time evolution and unitary symmetries of quantum systems, while their action on states by construction preserves the entanglement area law. MPU which […]
Quantum 9, 1644 (2025). https://doi.org/10.22331/q-2025-02-25-1644 Known mappings that encode fermionic modes into a bosonic qubit system are non-local transformations. In this paper we establish that this must necessarily be the case, if the locality graph […]
Quantum 9, 1643 (2025). https://doi.org/10.22331/q-2025-02-25-1643 Random access codes are a type of communication task that is widely used in quantum information science. The optimal average success probability that can be achieved through classical strategies is […]
Quantum 9, 1642 (2025). https://doi.org/10.22331/q-2025-02-25-1642 We present the Virtual Quantum Device (VQD) platform, a system based on the QuEST quantum emulator. Through the use of VQDs, non-expert users can emulate specific quantum computers with detailed […]
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