| Download | - View final version: Breaking the limits of purification: postselection enhances heat-bath algorithmic cooling (PDF, 1.2 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1088/2399-6528/acb414 |
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| Author | Search for: Goldberg, Aaron Z1ORCID identifier: https://orcid.org/0000-0002-3301-7672; Search for: Heshami, Khabat1ORCID identifier: https://orcid.org/0000-0003-3864-1930 |
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| Name affiliation | - National Research Council of Canada. Security and Disruptive Technologies
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| Funder | Search for: Natural Sciences and Engineering Research Council of Canada |
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| Format | Text, Article |
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| Subject | heat bath algorithmic cooling; postselection; quantum refrigeration; quantum thermodynamics; purification |
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| Abstract | Quantum technologies require pure states, which are often generated by extreme refrigeration. Heat-bath algorithmic cooling is the theoretically optimal refrigeration technique: it shuttles entropy from a multiparticle system to a thermal bath, thereby generating a quantum state with a high degree of purity. Here, we show how to surpass this hitherto-optimal technique by taking advantage of a single binary-outcome measurement. Our protocols can create arbitrary numbers of pure quantum states without any residual mixedness by using a recently discovered device known as a quantum switch to put two operations in superposition, with postselection certifying the complete purification. |
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| Publication date | 2023-01-27 |
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| Publisher | IOP Publishing |
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| Licence | |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 75dbc78b-2f43-4ba8-9140-43037cc74f9a |
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| Record created | 2023-03-03 |
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| Record modified | 2023-03-15 |
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