Cyclic superconducting refrigerators using guided fluxon propagation
We propose cyclic refrigeration in solid state, employing a gas of magnetic field vortices in a type-II superconductor—also known as fluxons—as the cooling agent. Refrigeration cycles are realized by envisioning a racetrack geometry consisting of both adiabatic and isothermal arms, etched into a typ...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2024-01-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.6.013085 |
| _version_ | 1827285033757442048 |
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| author | Tathagata Karmakar Étienne Jussiau Sreenath K. Manikandan Andrew N. Jordan |
| author_facet | Tathagata Karmakar Étienne Jussiau Sreenath K. Manikandan Andrew N. Jordan |
| author_sort | Tathagata Karmakar |
| collection | DOAJ |
| description | We propose cyclic refrigeration in solid state, employing a gas of magnetic field vortices in a type-II superconductor—also known as fluxons—as the cooling agent. Refrigeration cycles are realized by envisioning a racetrack geometry consisting of both adiabatic and isothermal arms, etched into a type-II superconductor. The guided propagation of fluxons in the racetrack is achieved by applying an external electrical current, in a Corbino geometry, through the sample. A gradient of magnetic field is set across the racetrack allowing one to adiabatically cool down and heat up the fluxons, which subsequently exchange heat with the cold and hot reservoirs, respectively. We characterize the steady state of refrigeration cycles thermodynamically for both s-wave and d-wave pairing symmetries, and present their figures of merit such as the cooling power delivered, and the coefficient of performance. Our cooling principle can offer significant cooling for on-chip microrefrigeration purposes, by locally cooling below the base temperatures achievable in a conventional dilution refrigerator. We estimate nW/mm^{2} of cooling power per unit area assuming a tunnel coupling with ∼MΩµm^{2} specific resistance. Integrating the fluxon fridge to quantum circuits can enhance their coherence time by locally suppressing thermal fluctuations, and improve the efficiency of single photon detectors and charge sensors. |
| first_indexed | 2024-04-24T10:08:27Z |
| format | Article |
| id | doaj.art-4ffc10025b5a433394fb7b9fffe7b1d8 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:08:27Z |
| publishDate | 2024-01-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-4ffc10025b5a433394fb7b9fffe7b1d82024-04-12T17:38:25ZengAmerican Physical SocietyPhysical Review Research2643-15642024-01-016101308510.1103/PhysRevResearch.6.013085Cyclic superconducting refrigerators using guided fluxon propagationTathagata KarmakarÉtienne JussiauSreenath K. ManikandanAndrew N. JordanWe propose cyclic refrigeration in solid state, employing a gas of magnetic field vortices in a type-II superconductor—also known as fluxons—as the cooling agent. Refrigeration cycles are realized by envisioning a racetrack geometry consisting of both adiabatic and isothermal arms, etched into a type-II superconductor. The guided propagation of fluxons in the racetrack is achieved by applying an external electrical current, in a Corbino geometry, through the sample. A gradient of magnetic field is set across the racetrack allowing one to adiabatically cool down and heat up the fluxons, which subsequently exchange heat with the cold and hot reservoirs, respectively. We characterize the steady state of refrigeration cycles thermodynamically for both s-wave and d-wave pairing symmetries, and present their figures of merit such as the cooling power delivered, and the coefficient of performance. Our cooling principle can offer significant cooling for on-chip microrefrigeration purposes, by locally cooling below the base temperatures achievable in a conventional dilution refrigerator. We estimate nW/mm^{2} of cooling power per unit area assuming a tunnel coupling with ∼MΩµm^{2} specific resistance. Integrating the fluxon fridge to quantum circuits can enhance their coherence time by locally suppressing thermal fluctuations, and improve the efficiency of single photon detectors and charge sensors.http://doi.org/10.1103/PhysRevResearch.6.013085 |
| spellingShingle | Tathagata Karmakar Étienne Jussiau Sreenath K. Manikandan Andrew N. Jordan Cyclic superconducting refrigerators using guided fluxon propagation Physical Review Research |
| title | Cyclic superconducting refrigerators using guided fluxon propagation |
| title_full | Cyclic superconducting refrigerators using guided fluxon propagation |
| title_fullStr | Cyclic superconducting refrigerators using guided fluxon propagation |
| title_full_unstemmed | Cyclic superconducting refrigerators using guided fluxon propagation |
| title_short | Cyclic superconducting refrigerators using guided fluxon propagation |
| title_sort | cyclic superconducting refrigerators using guided fluxon propagation |
| url | http://doi.org/10.1103/PhysRevResearch.6.013085 |
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