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Showing 1–8 of 8 results
Advanced filters: Author: Ludovico Lami Clear advanced filters

  • Quantum information theory typically considers the asymptotic limit of having access to many copies of quantum states, which can be challenging to analyse. Now an asymptotic measure of entanglement that only needs a single copy of a quantum state has been found

    • Ludovico Lami
    • Mario Berta
    • Bartosz Regula
    ResearchOpen Access
    Nature Physics
    Volume: 22, P: 439-445

  • Computing how much entanglement can be extracted from imperfect quantum states is a long-standing problem in quantum resource theory. Here, Lami and Regula move away from the usual case in which the operations considered free to implement are local operations and classical communication, and find instead a solution for the case of dually non-entangling operations.

    • Ludovico Lami
    • Bartosz Regula
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-8

  • Finding a classical description of a quantum state can require resource-intensive tomography protocols. It has now been shown that, for bosonic systems, tomography is extremely inefficient in general, but can be done efficiently for some useful states.

    • Francesco A. Mele
    • Antonio A. Mele
    • Salvatore F. E. Oliviero
    ResearchOpen Access
    Nature Physics
    Volume: 21, P: 2002-2008

  • Lower bounds on the energy-constrained and unconstrained two-way quantum and secret-key capacities of all phase-insensitive bosonic Gaussian channels are provided. It proves that a non-zero capacity exists for all parameters where the phase-insensitive bosonic Gaussian channels are not entanglement breaking.

    • Francesco Anna Mele
    • Ludovico Lami
    • Vittorio Giovannetti
    Research
    Nature Photonics
    Volume: 19, P: 329-334

  • The problem of reversibility within general quantum resource theories is still an open one. Here, the authors prove that a reversible entanglement manipulation framework (and, consequently, the concept of entanglement entropy) can be formally established by adjusting the setting to allow for probabilistic operations

    • Bartosz Regula
    • Ludovico Lami
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-7

  • An exact solution for the quantum and private capacities of bosonic dephasing channels is provided. The authors prove that these capacities are equal to the relative entropy of the distribution underlying the channel with respect to the uniform distribution.

    • Ludovico Lami
    • Mark M. Wilde
    Research
    Nature Photonics
    Volume: 17, P: 525-530

  • Quantum hypothesis testing—the task of distinguishing quantum states—enjoys surprisingly deep connections with the theory of entanglement. Recent findings have reopened the biggest questions in hypothesis testing and reversible entanglement manipulation.

    • Mario Berta
    • Fernando G. S. L. Brandão
    • Marco Tomamichel
    Comments & Opinion
    Nature Physics
    Volume: 20, P: 172-175

  • A formal analysis of the physical limits of entanglement manipulation shows that it cannot be done reversibly, highlighting an important difference from thermodynamics.

    • Ludovico Lami
    • Bartosz Regula
    ResearchOpen Access
    Nature Physics
    Volume: 19, P: 184-189