Cooling and Autonomous Feedback in a Bose-Hubbard Chain with Attractive Interactions
| Autor: | Vinay Ramasesh, Irfan Siddiqi, Shay Hacohen-Gourgy, C. De Grandi, Steven Girvin |
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| Rok vydání: | 2015 |
| Předmět: |
Superconductivity
Physics Quantum Physics Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Superconductivity General Physics and Astronomy FOS: Physical sciences Nanotechnology Transmon 7. Clean energy 01 natural sciences 010305 fluids & plasmas Superconductivity (cond-mat.supr-con) Qubit Quantum mechanics 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 010306 general physics Quantum Physics (quant-ph) Quantum Eigenvalues and eigenvectors Microwave Excitation Energy exchange |
| Zdroj: | Physical review letters. 115(24) |
| ISSN: | 1079-7114 |
| Popis: | We engineer a quantum bath that enables entropy and energy exchange with a one-dimensional Bose-Hubbard lattice with attractive on-site interactions. We implement this in an array of three superconducting transmon qubits coupled to a single cavity mode; the transmons represent lattice sites and their excitation quanta embody bosonic particles. Our cooling protocol preserves particle number--realizing a canonical ensemble-- and also affords the efficient preparation of dark states which, due to symmetry, cannot be prepared via coherent drives on the cavity. Furthermore, by applying continuous microwave radiation, we also realize autonomous feedback to indefinitely stabilize particular eigenstates of the array. 5 pages paper, 21 pages supplementary |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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