Bulletin of the American Physical Society
2021 Fall Meeting of the APS Division of Nuclear Physics
Volume 66, Number 8
Monday–Thursday, October 11–14, 2021; Virtual; Eastern Daylight Time
Session KN: Mini-Symposium: Quantum Information Science and Nuclear Theory V: Entanglement |
Hide Abstracts |
Chair: Natalie Klco, Caltech Room: Studio 1 |
Wednesday, October 13, 2021 11:30AM - 12:06PM |
KN.00001: Entanglement in conformal field theories with boundaries and interfaces Invited Speaker: Ananda Roy Entanglement, one of the quintessential properties of quantum mechanics, plays a central role in the development of long-range correlations in quantum critical phenomena. In this work, we investigate ground-state entanglement in quantum critical systems described by conformal field theories (CFTs) in the presence of boundaries and interfaces. In particular, we analytically compute entanglement entropies and entanglement spectra for the Ising and free, compactified boson CFTs for different boundary conditions. We compare the analytical predictions with numerical results obtained using the density matrix renormalization group technique. Furthermore, we investigate entanglement entropies across interfaces separating CFTs having identical conformal anomaly parameters. Finally, we describe a general scheme of experimentally realizing conformal interfaces and boundaries of the free, compactified boson CFT with superconducting quantum electronic circuits. |
Wednesday, October 13, 2021 12:06PM - 12:18PM |
KN.00002: Entanglement produced in pi-pi and pi-N scattering Silas R Beane, Roland Farrell, Mira Varma Recently, minimization of spin entanglement in baryon-baryon scattering has been shown to explain a SU(16) symmetry revealed by lattice QCD. Here we test the extent to which isospin entanglement is minimized in pi-pi and pi-N scattering. This is done by computing the entanglement power, a measure of entanglement due to interaction, of the pi-pi and pi-N S-matrices. Lastly, consequences of entanglement minimization for scattering with pions as well as comparisons to large Nc QCD will be discussed. |
Wednesday, October 13, 2021 12:18PM - 12:30PM |
KN.00003: Λ-hyperon spin correlations as a probe of Bell-type inequalities and quantum entanglement at high energy colliders Wenjie Gong, Ganesh Parida, Zhoudunming Tu, Raju Venugopalan The spin correlations of Λ-hyperons, due to their self-analyzing property in weak decays, can provide unique insight into Bell-type locality tests within the QCD strings formed in experiments at high-energy colliders-- specifically, tests of the CHSH (Clauser-Horne-Shimony-Holt) inequality. We show, from very general considerations, that the CHSH inequality test is typically less stringent for the states produced in QCD strings; however, they can be used to study quantum-to-classical transitions by varying control parameters such as i) the number of partons, or equivalently, the multiplicity of a string, ii) the spin of nucleons, and iii) the separation in rapidity between pairs. These measurements also allow, as a function of the stated control parameters, the extraction of quantitative measures of entanglement, the most straightforward being the entanglement fidelity of Λ Λ-bar spin correlations. We discuss a class of spin Hamiltonians that captures the dynamics of such spin correlations within the QCD string and outline the requirements for their simulation on a quantum computer. We further discuss the prospects for such measurements at current and future colliders. |
Wednesday, October 13, 2021 12:30PM - 12:42PM |
KN.00004: Entanglement entropy of nuclear models Chenyi Gu, Thomas Papenbrock We study the entropy of many-body nuclear system, which indicates the degree to which parts of the system are entangled, using the coupled-cluster method. For the pairing model we find a linear relationship between the entropy and the particle number fluctuation, similar to what is known for the non-interacting Fermi gas. For neutron matter we find that the entropy scales linearly with the particle number in momentum space. |
Wednesday, October 13, 2021 12:42PM - 12:54PM |
KN.00005: Entanglement Structures in Scalar Field Theory and Associated Theories Henry Froland, Martin J Savage Entanglement plays a crucial role in understanding many of the phenomena associated with many-body physics and field theories, particularly in regards to simulation. An important aspect of simulation is understanding the amount of distillable entanglement contained in the ground state of these systems. One measure of entanglement that provides an upper bound to the distillable entanglement is the logarithmic negativity (LN). The LN detects entanglement in mixed states and it's easy to calculate. For two disjoint regions in a harmonic chain, there is a separation distance at which a sudden death of negativity occurs and the regions become separable. Using techniques from conformal field theory (CFT) and the quantum information of continuous variable systems, we explore this phenomena and other nonperturbative physics associated with entanglement in bosonic field theories. |
Wednesday, October 13, 2021 12:54PM - 1:06PM |
KN.00006: Entanglement distillation from the vacuum of quantum spin chains Hersh Singh, Tanmoy Bhattacharya, Shailesh Chandrasekharan, Rajan Gupta The low-energy states of quantum many body systems, such as spin chains, are entangled. Using tensor network computations, we demonstrate a protocol that distills Bell pairs out of the ground state of the prototypical transverse-field Ising model. We explore the behavior of rate of entanglement distillation in various phases, and possible optimizations of the protocol. Finally, we comment on the protocol as we approach quantum criticality defining a continuum field theory. |
Wednesday, October 13, 2021 1:06PM - 1:18PM |
KN.00007: Thermalization of gauge theories from their entanglement spectra Niklas Mueller, Torsten V Zache, Robert Ott If and how gauge theories thermalize is an unanswered question. Partly, this is due to the inability of lattice gauge theory (LGT) simulations to simulate out-of-equilibrium quantum dynamics on classical computers, but also due the difficulty of defining entanglement entropy in lattice gauge theories and finding schemes for its practical computation. |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700