A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Quantum random access codes and incompatibility of measurements
Tekijät: Carmeli Claudio, Heinosaari Teiko, Toigo Alessandro
Kustantaja: IOP PUBLISHING LTD
Julkaisuvuosi: 2020
Journal: EPL
Tietokannassa oleva lehden nimi: EPL
Lehden akronyymi: EPL-EUROPHYS LETT
Artikkelin numero: ARTN 50001
Vuosikerta: 130
Numero: 5
Sivujen määrä: 6
ISSN: 0295-5075
eISSN: 1286-4854
DOI: https://doi.org/10.1209/0295-5075/130/50001
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/49499111
Tiivistelmä
It is one of the peculiar features of quantum physics that some sets of measurements are incompatible in the sense that they cannot be performed simultaneously. Incompatibility is an important quantum resource as it enables Bell nonlocality and steering. Here we show that incompatibility is crucial also in certain communication tasks; we prove that quantum random access code performs better than its classical counterpart only when incompatible quantum measurements are used in the decoding task. As a consequence, evaluating the average success probability for quantum random access code provides a semi-device-independent test for the detection of quantum incompatibility. We further demonstrate that any incompatible pair of projective measurements gives an advantage over all classical strategies. Finally, we establish a connection between the maximal average success probability for quantum random access code and earlier quantities introduced to assess incompatibility.
It is one of the peculiar features of quantum physics that some sets of measurements are incompatible in the sense that they cannot be performed simultaneously. Incompatibility is an important quantum resource as it enables Bell nonlocality and steering. Here we show that incompatibility is crucial also in certain communication tasks; we prove that quantum random access code performs better than its classical counterpart only when incompatible quantum measurements are used in the decoding task. As a consequence, evaluating the average success probability for quantum random access code provides a semi-device-independent test for the detection of quantum incompatibility. We further demonstrate that any incompatible pair of projective measurements gives an advantage over all classical strategies. Finally, we establish a connection between the maximal average success probability for quantum random access code and earlier quantities introduced to assess incompatibility.
Ladattava julkaisu This is an electronic reprint of the original article. |  |
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