Prospects for quantum process tomography at high energies

• URL: http://arxiv.org/abs/2412.01892v2
• Date: Wed, 23 Apr 2025 17:56:23 GMT
• Title: Prospects for quantum process tomography at high energies
• Authors: Clelia Altomonte, Alan J. Barr, Michał Eckstein, Paweł Horodecki, Kazuki Sakurai,
• Abstract summary: In quantum information theory, the evolution of an open quantum system is described by a quantum channel or, more generally, a quantum instrument.<n>We formulate spin and measurements in collider experiments as quantum instruments.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: In quantum information theory, the evolution of an open quantum system -- a unitary evolution followed by a measurement -- is described by a quantum channel or, more generally, a quantum instrument. In this work, we formulate spin and flavour measurements in collider experiments as quantum instruments. We demonstrate that the Choi matrix, which completely determines input-output transitions, can be both theoretically computed from a given model and experimentally reconstructed from a set of final state measurements (quantum state tomography) using varied input states. The experimental reconstruction of the Choi matrix, known as quantum process tomography, offers a powerful new approach for probing potential extensions of the Standard Model within the quantum field theory framework and, at the same time, constitutes a new foundational test of quantum mechanics itself. As an example, we outline the quantum process tomography approach applied to the $e^+ e^- \to t \bar{t}$ process at a polarized lepton collider.

Related papers

• A Theory of Quantum Jumps [44.99833362998488]
  We study fluorescence and the phenomenon of quantum jumps'' in idealized models of atoms coupled to the quantized electromagnetic field. Our results amount to a derivation of the fundamental randomness in the quantum-mechanical description of microscopic systems.
  arXiv  Detail & Related papers  (2024-04-16T11:00:46Z)
• Simulating quantum field theories on continuous-variable quantum computers [0.0]
  We develop and prove a method to reproduce the time evolution of quantum-mechanical states under arbitrary Hamiltonians. Our method centres on constructing an evolver-state, a specially prepared quantum state that induces the desired time-evolution on the target state. We propose a framework in which these methods can be extended to encode field theories in CVQC without discretising the field values.
  arXiv  Detail & Related papers  (2024-03-15T18:31:09Z)
• Quantum data learning for quantum simulations in high-energy physics [55.41644538483948]
  We explore the applicability of quantum-data learning to practical problems in high-energy physics. We make use of ansatz based on quantum convolutional neural networks and numerically show that it is capable of recognizing quantum phases of ground states. The observation of non-trivial learning properties demonstrated in these benchmarks will motivate further exploration of the quantum-data learning architecture in high-energy physics.
  arXiv  Detail & Related papers  (2023-06-29T18:00:01Z)
• Characterizing quantum instruments: from non-demolition measurements to quantum error correction [48.43720700248091]
  In quantum information processing quantum operations are often processed alongside measurements which result in classical data. Non-unitary dynamical processes can take place on the system, for which common quantum channel descriptions fail to describe the time evolution. Quantum measurements are correctly treated by means of so-called quantum instruments capturing both classical outputs and post-measurement quantum states.
  arXiv  Detail & Related papers  (2021-10-13T18:00:13Z)
• Quantum tomography explains quantum mechanics [0.0]
  A suggestive notion for what constitutes a quantum detector leads to a logically impeccable definition of measurement. The various forms of quantum tomography for quantum states, quantum detectors, quantum processes, and quantum instruments are discussed. The new approach is closer to actual practice than the traditional foundations.
  arXiv  Detail & Related papers  (2021-10-11T14:09:30Z)
• Efficient criteria of quantumness for a large system of qubits [58.720142291102135]
  We discuss the dimensionless combinations of basic parameters of large, partially quantum coherent systems. Based on analytical and numerical calculations, we suggest one such number for a system of qubits undergoing adiabatic evolution.
  arXiv  Detail & Related papers  (2021-08-30T23:50:05Z)
• Variational quantum process tomography [12.843681115589122]
  We put forward a quantum machine learning algorithm which encodes the unknown unitary quantum process into a relatively shallow depth parametric quantum circuit. Results show that those quantum processes could be reconstructed with high fidelity, while the number of input states required are at least $2$ orders of magnitude less than required by the standard quantum process tomography.
  arXiv  Detail & Related papers  (2021-08-05T03:36:26Z)
• Information Scrambling in Computationally Complex Quantum Circuits [56.22772134614514]
  We experimentally investigate the dynamics of quantum scrambling on a 53-qubit quantum processor. We show that while operator spreading is captured by an efficient classical model, operator entanglement requires exponentially scaled computational resources to simulate.
  arXiv  Detail & Related papers  (2021-01-21T22:18:49Z)
• Quantum Phases of Matter on a 256-Atom Programmable Quantum Simulator [41.74498230885008]
  We demonstrate a programmable quantum simulator based on deterministically prepared two-dimensional arrays of neutral atoms. We benchmark the system by creating and characterizing high-fidelity antiferromagnetically ordered states. We then create and study several new quantum phases that arise from the interplay between interactions and coherent laser excitation.
  arXiv  Detail & Related papers  (2020-12-22T19:00:04Z)
• Light-Front Field Theory on Current Quantum Computers [0.06524460254566902]
  We present a quantum algorithm for simulation of quantum field theory in the light-front formulation. We demonstrate how existing quantum devices can be used to study the structure of bound states in relativistic nuclear physics.
  arXiv  Detail & Related papers  (2020-09-16T18:32:00Z)
• Quantum simulation of quantum field theories as quantum chemistry [9.208624182273288]
  Conformal truncation is a powerful numerical method for solving generic strongly-coupled quantum field theories. We show that quantum computation could not only help us understand fundamental physics in the lattice approximation, but also simulate quantum field theory methods directly.
  arXiv  Detail & Related papers  (2020-04-28T01:20:04Z)
• Probing the Universality of Topological Defect Formation in a Quantum Annealer: Kibble-Zurek Mechanism and Beyond [46.39654665163597]
  We report on experimental tests of topological defect formation via the one-dimensional transverse-field Ising model. We find that the quantum simulator results can indeed be explained by the KZM for open-system quantum dynamics with phase-flip errors. This implies that the theoretical predictions of the generalized KZM theory, which assumes isolation from the environment, applies beyond its original scope to an open system.
  arXiv  Detail & Related papers  (2020-01-31T02:55:35Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.