Weight-based measure of quantum memory as a universal and operational benchmark
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866914189862240256 |
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| author | Zhang, Jinghang Luo, Yu |
| author_facet | Zhang, Jinghang Luo, Yu |
| contents | Quantum memory plays a critical role in quantum communication, sensing, and computation. However, studies on quantum memory under a unified benchmarking framework remain scarce. In this paper, we propose a weight-based quantifier as a benchmarking method to evaluate the performance advantage of quantum memory in nonlocal exclusion tasks. We establish a general lower bound for the weight-based measure of quantum memory. Moreover, this measure provides fundamental theoretical bounds for transforming a general channel into an ideal quantum memory. Finally, we present explicit calculations of the weight-based quantifier for various channels, including unitary channels, depolarizing channels, maximal replacement channels, stochastic damping channels, and erasure channels. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_09417 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Weight-based measure of quantum memory as a universal and operational benchmark Zhang, Jinghang Luo, Yu Quantum Physics Quantum memory plays a critical role in quantum communication, sensing, and computation. However, studies on quantum memory under a unified benchmarking framework remain scarce. In this paper, we propose a weight-based quantifier as a benchmarking method to evaluate the performance advantage of quantum memory in nonlocal exclusion tasks. We establish a general lower bound for the weight-based measure of quantum memory. Moreover, this measure provides fundamental theoretical bounds for transforming a general channel into an ideal quantum memory. Finally, we present explicit calculations of the weight-based quantifier for various channels, including unitary channels, depolarizing channels, maximal replacement channels, stochastic damping channels, and erasure channels. |
| title | Weight-based measure of quantum memory as a universal and operational benchmark |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2511.09417 |