Lu, D. W. and Biamonte, J. D. and Li, J. and Li, H. and Johnson, T. H. and Zimborás, Zoltán (2016) Chiral quantum walks. PHYSICAL REVIEW A, 93 (4). ISSN 2469-9926
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Abstract
Given its importance to many other areas of physics, from condensed matter physics to ther- modynamics, time-reversal symmetry has had relatively little influence on quantum information science. Here we develop a network-based picture of time-reversal theory, classifying Hamiltonians and quantum circuits as time-symmetric or not in terms of the elements and geometries of their underlying networks. Many of the typical circuits of quantum information science are found to ex- hibit time-asymmetry. Moreover, we show that time-asymmetry in circuits can be controlled using local gates only, and can simulate time-asymmetry in Hamiltonian evolution. We experimentally implement a fundamental example in which controlled time-reversal asymmetry in a palindromic quantum circuit leads to near-perfect transport. Our results pave the way for using time-symmetry breaking to control coherent transport, and imply that time-asymmetry represents an omnipresent yet poorly understood effect in quantum information science.
Item Type: | Article |
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Subjects: | Q Science / természettudomány > QC Physics / fizika |
SWORD Depositor: | MTMT SWORD |
Depositing User: | MTMT SWORD |
Date Deposited: | 29 Sep 2023 14:37 |
Last Modified: | 29 Sep 2023 14:37 |
URI: | http://real.mtak.hu/id/eprint/175760 |
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