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Klassen, J.D. (author), Marvian, Milad (author), Piddock, Stephen (author), Ioannou, Marios (author), Hen, Itay (author), Terhal, B.M. (author)We examine the problem of determining whether a multiqubit two-local Hamiltonian can be made stoquastic by single-qubit unitary transformations. We prove that when such a Hamiltonian contains one-local terms, then this task can be NP-hard. This is shown by constructing a class of Hamiltonians for which performing this task is equivalent to...journal article 2020
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Agarwal, Girish (author), Allen, Roland E. (author), Bezděková, Iva (author), Boyd, Robert W. (author), Chen, Goong (author), Hanson, R. (author), Hawthorne, Dean L. (author), Hemmer, Philip (author), Kim, Moochan B. (author), Kocharovskaya, Olga (author), Lee, D. (author), Lidström, Sebastian K. (author), Lidström, Suzy (author), Losert, Harald (author), Maier, Helmut (author), Neuberger, John W. (author), Padgett, Miles J. (author), Raizen, Mark (author), Rajendran, Surjeet (author), Rasel, Ernst (author), Schleich, Wolfgang P. (author), Scully, Marlan O. (author), Shchedrin, Gavriil (author), Shvets, Gennady (author), Sokolov, Alexei (author), Svidzinsky, Anatoly (author), Walsworth, Ronald L. (author), Weiss, Rainer (author), Wilczek, Frank (author), Willner, Alan E. (author), Yablonovich, Eli (author), Zheludev, Nikolay (author)The Winter Colloquium on the Physics of Quantum Electronics (PQE) has been a seminal force in quantum optics and related areas since 1971. It is rather mind-boggling to recognize how the concepts presented at these conferences have transformed scientific understanding and human society. In January 2017, the participants of PQE were asked to...journal article 2018
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Oi, Daniel K.L. (author), Ling, Alex (author), Vallone, Giuseppe (author), Villoresi, Paolo (author), Greenland, Steve (author), Kerr, Emma (author), Macdonald, Malcolm (author), Weinfurter, Harald (author), Kuiper, J.M. (author), Charbon-Iwasaki-Charbon, E. (author), Ursin, Rupert (author)Quantum communication is a prime space technology application and offers near-term possibilities for long-distance quantum key distribution (QKD) and experimental tests of quantum entanglement. However, there exists considerable developmental risks and subsequent costs and time required to raise the technological readiness level of...journal article 2017