dorsal/arxiv
View SchemaAre there quantum bounds on the recyclability of clock signals in low power computers?
| Authors | Dominik Janzing, Thomas Beth |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0202059 |
| URL | https://arxiv.org/abs/quant-ph/0202059 |
Abstract
Even if a logical network consists of thermodynamically reversible gate operations, the computation process may have high dissipation rate if the gate implementation is controlled by external clock signals. It is an open question whether the global clocking mechanism necessarily envolves irreversible processes. However, one can show that it is not possible to extract any timing information from a micro-physical clock without disturbing it. Applying recent results of quantum information theory we can show a hardware-independent lower bound on the timing information that is necessarily destroyed if one tries to copy the signal. The bound becomes tighter for low energy signals, i.e., the timing information gets more and more quantum.
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"abstract": "Even if a logical network consists of thermodynamically reversible gate\noperations, the computation process may have high dissipation rate if the gate\nimplementation is controlled by external clock signals. It is an open question\nwhether the global clocking mechanism necessarily envolves irreversible\nprocesses. However, one can show that it is not possible to extract any timing\ninformation from a micro-physical clock without disturbing it. Applying recent\nresults of quantum information theory we can show a hardware-independent lower\nbound on the timing information that is necessarily destroyed if one tries to\ncopy the signal. The bound becomes tighter for low energy signals, i.e., the\ntiming information gets more and more quantum.",
"arxiv_id": "quant-ph/0202059",
"authors": [
"Dominik Janzing",
"Thomas Beth"
],
"categories": [
"quant-ph"
],
"title": "Are there quantum bounds on the recyclability of clock signals in low power computers?",
"url": "https://arxiv.org/abs/quant-ph/0202059"
},
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