Generating Symmetry-Protected Long-Range Entanglement in Many-Body Systems
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arXiv
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| Format: | Preprint |
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2022
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| _version_ | 1866911799463378944 |
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| author | Dutta, Shovan Kuhr, Stefan Cooper, Nigel R. |
| author_facet | Dutta, Shovan Kuhr, Stefan Cooper, Nigel R. |
| contents | Entanglement between spatially distant qubits is perhaps the most counterintuitive and vital resource for distributed quantum computing. However, despite a few special cases, there is no known general procedure to maximally entangle two distant parts of an interacting many-body system. Here we present a symmetry-based approach, whereby one applies several timed pulses to drive a system to a particular symmetry sector with maximal bipartite long-range entanglement. As a concrete example, we demonstrate how a simple sequence of on-site pulses on a qubit array can efficiently produce any given number of stable nonlocal Bell pairs, realizable in several present-day atomic and photonic experimental platforms. More generally, our approach paves a route for novel state preparation by harnessing symmetry. For instance, we show how it enables the creation of long-sought-after superconducting $η$ pairs in a repulsive Hubbard model. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2201_10564 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Generating Symmetry-Protected Long-Range Entanglement in Many-Body Systems Dutta, Shovan Kuhr, Stefan Cooper, Nigel R. Quantum Gases Strongly Correlated Electrons Superconductivity Quantum Physics Entanglement between spatially distant qubits is perhaps the most counterintuitive and vital resource for distributed quantum computing. However, despite a few special cases, there is no known general procedure to maximally entangle two distant parts of an interacting many-body system. Here we present a symmetry-based approach, whereby one applies several timed pulses to drive a system to a particular symmetry sector with maximal bipartite long-range entanglement. As a concrete example, we demonstrate how a simple sequence of on-site pulses on a qubit array can efficiently produce any given number of stable nonlocal Bell pairs, realizable in several present-day atomic and photonic experimental platforms. More generally, our approach paves a route for novel state preparation by harnessing symmetry. For instance, we show how it enables the creation of long-sought-after superconducting $η$ pairs in a repulsive Hubbard model. |
| title | Generating Symmetry-Protected Long-Range Entanglement in Many-Body Systems |
| topic | Quantum Gases Strongly Correlated Electrons Superconductivity Quantum Physics |
| url | https://arxiv.org/abs/2201.10564 |