Searching for Bloch wave packets with almost definite momentum direction
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866912606999019520 |
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| author | Goussev, Arseni Morozov, Gregory V. |
| author_facet | Goussev, Arseni Morozov, Gregory V. |
| contents | The motion of a quantum particle in a one-dimensional periodic potential can be described in terms of Bloch wave packets. Like free-particle wave packets, they can propagate without attenuation. Here, we examine this similarity more closely by investigating whether Bloch wave packets can maintain a definite -- or nearly definite -- momentum direction, a property inherent to free-particle wave packets. This question is particularly relevant to the feasibility of using solid-state-based systems in the search for the first experimental realization of quantum backflow, a quantum interference effect in which a particle's probability density flows in a direction opposite to its momentum. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2504_12489 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Searching for Bloch wave packets with almost definite momentum direction Goussev, Arseni Morozov, Gregory V. Quantum Physics Mesoscale and Nanoscale Physics The motion of a quantum particle in a one-dimensional periodic potential can be described in terms of Bloch wave packets. Like free-particle wave packets, they can propagate without attenuation. Here, we examine this similarity more closely by investigating whether Bloch wave packets can maintain a definite -- or nearly definite -- momentum direction, a property inherent to free-particle wave packets. This question is particularly relevant to the feasibility of using solid-state-based systems in the search for the first experimental realization of quantum backflow, a quantum interference effect in which a particle's probability density flows in a direction opposite to its momentum. |
| title | Searching for Bloch wave packets with almost definite momentum direction |
| topic | Quantum Physics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2504.12489 |