Resources

Publications

  • Training Variational Quantum Algorithms Is NP-Hard

    Author(s): Lennart Bittel and Martin Kliesch The existence of persistent local minima can render the training of variational quantum algorithms infeasible. [Phys. Rev. Lett. 127, 120502] Published Fri Sep 17, 2021

  • Chirality-Induced Spin Polarization over Macroscopic Distances in Chiral Disilicide Crystals

    Author(s): Kohei Shiota, Akito Inui, Yuta Hosaka, Ryoga Amano, Yoshichika Ōnuki, Masato Hedo, Takao Nakama, Daichi Hirobe, Jun-ichiro Ohe, Jun-ichiro Kishine, Hiroshi M. Yamamoto, Hiroaki Shishido, and Yoshihiko Togawa Chiral crystals can produce spin-polarized currents that propagate over tens of microns—a promising feature for application in spintronics devices. [Phys. Rev. Lett. 127, 126602] Published Tue Sep 14, 2021

  • Emergent Fine Structure Constant of Quantum Spin Ice Is Large

    Author(s): Salvatore D. Pace, Siddhardh C. Morampudi, Roderich Moessner, and Chris R. Laumann Inside a quantum spin ice, the constant that defines electromagnetic interactions is 10 times larger than normal, according to calculations. [Phys. Rev. Lett. 127, 117205] Published Thu Sep 09, 2021

  • Anomalous Diffusion and Lévy Walks Distinguish Active from Inertial Turbulence

    Author(s): Siddhartha Mukherjee, Rahul K. Singh, Martin James, and Samriddhi Sankar Ray Simulations show that the harder bacteria in a swarm push against one another, the more likely they are to go on long “walks.” [Phys. Rev. Lett. 127, 118001] Published Thu Sep 09, 2021

  • Defect Saturation in a Rapidly Quenched Bose Gas

    Author(s): Junhong Goo, Younghoon Lim, and Y. Shin Deviations in the defect saturation in a weakly interacting Bose gas suggest that the effect goes beyond the description provided by the Kibble–Zurek mechanism. [Phys. Rev. Lett. 127, 115701] Published Wed Sep 08, 2021

  • Suppressing the Kibble-Zurek Mechanism by a Symmetry-Violating Bias

    Author(s): J. Rysti, J. T. Mäkinen, S. Autti, T. Kamppinen, G. E. Volovik, and V. B. Eltsov Researchers demonstrate that they can suppress the formation of defects that appear in superfluid helium-3 when it undergoes a continuous phase transition, allowing them to influence the form of the system’s final phase. [Phys. Rev. Lett. 127, 115702] Published Wed Sep 08, 2021

  • Observation of the Mass Difference between Neutral Charm-Meson Eigenstates

    Author(s): R. Aaij et al. (LHCb Collaboration) The observation of neutral D mesons oscillating into their antiparticle partners provides constraints on new heavy particles that can’t be directly produced by high-energy colliders. [Phys. Rev. Lett. 127, 111801] Published Tue Sep 07, 2021
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