[
    {
        "id": "authors:9x3hm-03b32",
        "collection": "authors",
        "collection_id": "9x3hm-03b32",
        "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20170228-191741490",
        "type": "monograph",
        "title": "Quantum Circuit Cosmology: The Expansion of the Universe Since the First Qubit",
        "author": [
            {
                "family_name": "Bao",
                "given_name": "Ning",
                "orcid": "0000-0002-3296-1039",
                "clpid": "Bao-Ning"
            },
            {
                "family_name": "Cao",
                "given_name": "ChunJun",
                "orcid": "0000-0002-5761-5474",
                "clpid": "Cao-ChunJun"
            },
            {
                "family_name": "Carroll",
                "given_name": "Sean M.",
                "orcid": "0000-0002-4226-5758",
                "clpid": "Carroll-S-M"
            },
            {
                "family_name": "McAllister",
                "given_name": "Liam",
                "clpid": "McAllister-L"
            }
        ],
        "abstract": "We consider cosmological evolution from the perspective of quantum\ninformation. We present a quantum circuit model for the expansion of a comoving\nregion of space, in which initially-unentangled ancilla qubits become entangled\nas expansion proceeds. We apply this model to the comoving region that now\ncoincides with our Hubble volume, taking the number of entangled degrees of\nfreedom in this region to be proportional to the de Sitter entropy. The quantum\ncircuit model is applicable for at most 140 e-folds of inflationary and\npost-inflationary expansion: we argue that no geometric description was\npossible before the time t_1 when our comoving region was one Planck length\nacross, and contained one pair of entangled degrees of freedom. This approach\ncould provide a framework for modeling the initial state of inflationary\nperturbations.",
        "doi": "10.48550/arXiv.1702.06959",
        "publisher": "arXiv",
        "publication_date": "2017-02-22"
    }
]