Recycling qubits in near-term quantum computers
نویسندگان
چکیده
Quantum computers are capable of efficiently contracting unitary tensor networks, a task that is likely to remain difficult for classical computers. For instance, networks based on matrix product states or the multi-scale entanglement renormalization ansatz (MERA) can be contracted small quantum computer aid simulation large system. However, without ability selectively reset qubits, associated spatial cost exorbitant. In this paper, we propose protocol unitarily qubits when circuit has common convolutional form, thus dramatically reducing implementing contraction algorithm general near-term This generates fresh from used ones by partially applying time-reversed over no longer in use. absence noise, prove state subset these becomes $|0\ldots 0\rangle$, up an error exponentially number gates applied. We also provide numerical evidence works presence noise. and formulate condition under which noise-resilience follows rigorously.
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2021
ISSN: ['1538-4446', '1050-2947', '1094-1622']
DOI: https://doi.org/10.1103/physreva.103.042613