| Presentation | 2016-01-21 [Invited Talk] Study on Reversibility and Energy Dissipation in Adiabatic Quantum-Flux-Parametron Logic Naoki Takeuchi, Yuki Yamanashi, Nobuyuki Yoshikawa, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Reversible computing is considered to be a key technology to achieve an extremely small bit energy in future computers. In this study, we investigated the relationship between time reversibility and energy dissipation, and discussed if time reversibility is required in reversible computing using adiabatic superconductor logic. We analyzed the evolution of phase differences of Josephson junctions in the reversible quantum-flux-parametron (RQFP) gate and confirmed that the phase differences can always change time reversibly. We calculated energy dissipation required for the RQFP gate to perform a logic operation and numerically demonstrated that the bit energy can fall below the thermal limit, or the Landauer bound, by lowering operation frequencies. We also investigated the 1-bit-erasure gate as a logically and physically irreversible gate. We calculated the bit energy of the irreversible gate and showed that energy dissipation of the gate is dominated by non-adiabatic state changes, which are induced by unwanted interactions between gates due to logical or physical irreversibility. Our results show that, in reversible computing using adiabatic superconductor logic, time reversibility is required to achieve a bit energy smaller than the Landauer bound without non-adiabatic processes caused by gate interactions. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | QFP / Adiabatic Logic / Reversible Computing |
| Paper # | SCE2015-41 |
| Date of Issue | 2016-01-14 (SCE) |
| Conference Information | |
| Committee | SCE |
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| Conference Date | 2016/1/21(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Nobuyuki Yoshikawa(Yokohama National Univ.) |
| Vice Chair | |
| Secretary | (Yokohama National Univ.) |
| Assistant | Hiroyuki Akaike(Nagoya Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Superconductive Electronics |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Invited Talk] Study on Reversibility and Energy Dissipation in Adiabatic Quantum-Flux-Parametron Logic |
| Sub Title (in English) | |
| Keyword(1) | QFP |
| Keyword(2) | Adiabatic Logic |
| Keyword(3) | Reversible Computing |
| 1st Author's Name | Naoki Takeuchi |
| 1st Author's Affiliation | Yokohama National University(Yokohama Nat. Univ.) |
| 2nd Author's Name | Yuki Yamanashi |
| 2nd Author's Affiliation | Yokohama National University(Yokohama Nat. Univ.) |
| 3rd Author's Name | Nobuyuki Yoshikawa |
| 3rd Author's Affiliation | Yokohama National University(Yokohama Nat. Univ.) |
| Date | 2016-01-21 |
| Paper # | SCE2015-41 |
| Volume (vol) | vol.115 |
| Number (no) | SCE-412 |
| Page | pp.pp.29-34(SCE), |
| #Pages | 6 |
| Date of Issue | 2016-01-14 (SCE) |