arabesque
发表于 2025-3-28 16:20:21
Complete Positivity,shown that reduced dynamics can always be written as a sum of operators, but only completely positive reduced dynamics can be written as a Kraus operator sum. We will briefly discuss the claim that complete positivity is a physical requirement of nature, and we will point out some problems with this
lattice
发表于 2025-3-28 19:36:41
Physical Motivation of Complete Positivity,. As always, rigorous experiments are required to test the complete positivity assumption of quantum operations, but as far as we are aware, no such experiments have yet been conducted.. Until such experiments are performed, we are left with a mathematical theory that seems to allow negative channel
Antioxidant
发表于 2025-3-29 01:41:35
Measures of Complete Positivity,simple conditions. If the composite dynamics are described by “local unitaries” or if the initial composite state has “zero discord,” then completely positive dynamics are guaranteed. These proofs are shown below. Other cases require directly testing the system for complete positivity.
Erythropoietin
发表于 2025-3-29 05:23:58
Negative Climates with Diagonal Composite Dynamics,mate describes a two qubit composite system undergoing diagonal unitary composite dynamics with a sharp operation that prepares the bath in some unitary rotation of the reduced system. The composite dynamics may not be in local unitary form, and the sharp operation does not lead to completely positi
种子
发表于 2025-3-29 11:12:16
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Dealing
发表于 2025-3-29 12:03:12
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lobster
发表于 2025-3-29 18:15:40
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Interdict
发表于 2025-3-29 20:14:14
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Exposure
发表于 2025-3-30 00:04:24
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Inflated
发表于 2025-3-30 07:17:04
Conclusions,ed to better understand how modern quantum information theory concepts can be implemented and tested in the lab. A complete theory of quantum information must necessarily include an understanding of negative channels. Negative channels can be created in the lab, and the degree to which a channel is