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  • Letter

Quantum jamming: Critical properties of a quantum mechanical perceptron

Claudia Artiaco1,2,3,*, Federico Balducci1,2,3, Giorgio Parisi4,5,6, and Antonello Scardicchio2,3

  • 1SISSA, via Bonomea 265, 34136, Trieste, Italy
  • 2The Abdus Salam International Center for Theoretical Physics, Strada Costiera 11, 34151 Trieste, Italy
  • 3INFN Sezione di Trieste, Via Valerio 2, 34127 Trieste, Italy
  • 4Dipartimento di Fisica, Sapienza Università di Roma, Piazzale A. Moro 2, 00185 Rome, Italy
  • 5INFN, Sezione di Roma I, Piazzale A. Moro 2, 00185 Roma, Italy
  • 6Nanotec-CNR, UOS Rome, Sapienza Università di Roma, Piazzale A. Moro 2, 00185, Rome, Italy

  • *cartiaco@sissa.it

Phys. Rev. A 103, L040203 – Published 30 April, 2021

DOI: https://doi.org/10.1103/PhysRevA.103.L040203

Abstract

In this Letter, we analyze the quantum dynamics of the perceptron model: a particle is constrained on an N-dimensional sphere, with N→∞, and subjected to a set of randomly placed hard-wall potentials. This model has several applications, ranging from learning protocols to the effective description of the dynamics of an ensemble of infinite-dimensional hard spheres in Euclidean space. We find that the jamming transition with quantum dynamics shows critical exponents different from the classical case. We also find that the quantum jamming transition, unlike the typical quantum critical points, is not confined to the zero-temperature axis, and the classical results are recovered only at T=∞. Our findings have implications for the theory of glasses at ultralow temperatures and for the study of quantum machine-learning algorithms.

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