%0 Journal Article %T Quantum memory with near-millisecond coherence in circuit QED %+ Departments of Applied Physics [New Haven] %+ Quantronics Group (QUANTRONICS) %A Reagor, Matthew %A Pfaff, Wolfgang %A Axline, Christopher %A Heeres, Reinier W. %A Ofek, Nissim %A Sliwa, Katrina %A Holland, Eric %A Wang, Chen %A Blumoff, Jacob %A Chou, Kevin %A Hatridge, Michael J. %A Frunzio, Luigi %A Devoret, Michel H. %A Jiang, Liang %A Schoelkopf, Robert J. %< avec comité de lecture %@ 1098-0121 %J Physical Review B: Condensed Matter and Materials Physics (1998-2015) %I American Physical Society %V 94 %N 1 %8 2016 %D 2016 %Z 1508.05882 %R 10.1103/PhysRevB.94.014506 %Z Physics [physics]Journal articles %X Significant advances in coherence have made superconducting quantum circuits a viable platform for fault-tolerant quantum computing. To further extend capabilities, highly coherent quantum systems could act as quantum memories for these circuits. A useful quantum memory must be rapidly addressable by qubits, while maintaining superior coherence. We demonstrate a novel supercon-ducting microwave cavity architecture that is highly robust against major sources of loss that are encountered in the engineering of circuit QED systems. The architecture allows for near-millisecond storage of quantum states in a resonator while strong coupling between the resonator and a trans-mon qubit enables control, encoding, and readout at MHz rates. The observed coherence times constitute an improvement of almost an order of magnitude over those of the best available super-conducting qubits. Our design is an ideal platform for studying coherent quantum optics and marks an important step towards hardware-efficient quantum computing with Josephson junction-based quantum circuits. %G English %2 https://cea.hal.science/cea-01485238/document %2 https://cea.hal.science/cea-01485238/file/1508.05882.pdf %L cea-01485238 %U https://cea.hal.science/cea-01485238 %~ CEA %~ CNRS %~ IRAMIS-SPEC %~ CEA-UPSAY %~ UNIV-PARIS-SACLAY %~ CEA-UPSAY-SACLAY %~ GS-ENGINEERING %~ IRAMIS %~ GS-PHYSIQUE %~ INSTITUT-SCIENCES-LUMIERE