Prakash Murali
Abstract
Trapped ions (TIs) are a leading candidate for building Noisy Intermediate-Scale Quantum (NISQ) hardware. TI qubits have fundamental advantages over other technologies, featuring high qubit quality, coherence time, and qubit connectivity. However, current TI systems are small in size and typically use a single trap architecture, which has fundamental scalability limitations. To progress toward the next major milestone of 50--100 qubit TI devices, a modular architecture termed the Quantum Charge Coupled Device (QCCD) has been proposed. In a QCCD-based TI device, small traps are connected through ion shuttling. While the basic hardware components for such devices have been demonstrated, building a 50--100 qubit system is challenging because of a wide range of design possibilities for trap sizing, communication topology, and gate implementations and the need to match diverse application resource requirements.
Toward realizing QCCD-based TI systems with 50--100 qubits, we perform an extensive application-driven architectural study evaluating the key design choices of trap sizing, communication topology, and operation implementation methods. To enable our study, we built a design toolflow, which takes a QCCD architecture's parameters as input, along with a set of applications and realistic hardware performance models. Our toolflow maps the applications onto the target device and simulates their execution to compute metrics such as application run time, reliability, and device noise rates. Using six applications and several hardware design points, we show that trap sizing and communication topology choices can impact application reliability by up to three orders of magnitude. Microarchitectural gate implementation choices influence reliability by another order of magnitude. From these studies, we provide concrete recommendations to tune these choices to achieve highly reliable and performant application executions. With industry and academic efforts underway to build TI devices with 50-100 qubits, our insights have the potential to influence QC hardware in the near future and accelerate the progress toward practical QC systems.
- Arute, F., Arya, K., Babbush, R., Bacon, D., Bardin, J.C., Barends, R., Biswas, R., Boxo, S., Brandao, F.G.S.L., Buell, D.A., Burkett, B., Chen, Y., Chen, Z., Chiaro, B., Collins, R., Courtney, W., Dunsworth, A., Farhi, E., Foxen, B., Fowler, A., Gidney, C., Giustina, M., Graff, R., Guerin, K., Habegger, S., Harrigan, M.P., Hartmann, M.J., Ho, A., Hoffmann, M., Huang, T., Humble, T.S., Isakov, S.V., Jeffrey, E., Jiang, Z., Kafri, D., Kechedzhi, K., Kelly, J., Klimov, P.V., Knysh, S., Korotkov, A., Kostritsa, F., Landhuis, D., Lindmark, M., Lucero, E., Lyakh, D., Mandrà, S., McClean, J.R., McEwen, M., Megrant, A., Mi, X., Michielsen, K., Mohseni, M., Mutus, J., Naaman, O., Neeley, M., Neill, C., Niu, M.Y., Ostby, E., Petukhov, A., Platt, J.C., Quintana, C., Rieffel, E.G., Roushan, P., Rubin, N.C., Sank, D., Satzinger, K.J., Smelyanskiy, V., Sung, K.J., Trevithick, M.D., Vainsencher, A., Villalonga, B., White, T., Yao, Z.J., Yeh, P., Zalcman, A., Neven, H., Martinis, J.M. Quantum supremacy using a programmable superconducting processor. Nature 574, 7779 (2019), 505--510.Google Scholar
Cross Ref
- Blumel, R., Grzesiak, N., Nam, Y. Power-optimal, stabilized entangling gate between trapped-ion qubits. arXiv:1905.09292 (2019).Google Scholar
- Bowler, R., Gaebler, J., Lin, Y., Tan, T.R., Hanneke, D., Jost, J.D., Home, J.P., Leibfried, D., Wineland, D.J. Coherent diabatic ion transport and separation in a multizone trap array. Phys. Rev. Lett. 109 (2012), 080502.Google ScholarCross Ref
- Choi, T., Debnath, S., Manning, T.A., Figgatt, C., Gong, Z.-X., Duan, L.-M., Monroe, C. Optimal quantum control of multimode couplings between trapped ion qubits for scalable entanglement. Phys. Rev. Lett. 112 (2014), 190502.Google ScholarCross Ref
- Egan, L., Debroy, D.M., Noel, C., Risinger, A., Zhu, D., Biswas, D., Newman, M., Li, M., Brown, K.R., Cetina, M., Monroe, C. Fault-tolerant operation of a quantum error-correction code. arXiv:2009.11482 (2020).Google Scholar
- Fu, X., Schouten, R., Almudever, C., DiCarlo, L., Bertels, K., Rol, M., Bultink, C., van Someren, H., Khammassi, N., Ashraf, I., Vermeulen, R., Sterke, J., Vlothuizen, W. An experimental microarchitecture for a superconducting quantum processor. In Proceedings of the 50th Annual IEEE/ACM International Symposium on Microarchitecture, MICRO-50'17, Association for Computing Machinery, New York, NY, USA, 2017, 813--825.Google ScholarDigital Library
- Holz, P.C., Auchter, S., Stocker, G., Valentini, M., Lakhmanskiy, K., Rössler, C., Stampfer, P., Sgouridis, S., Aschauer, E., Colombe, Y., Blatt, R. 2D Linear trap array for quantum information processing. Adv. Quantum Technol. 3, 11 (2020), 2000031.Google Scholar
- Javadi-Abhari, A., Gokhale, P., Holmes, A., Franklin, D., Brown, K.R., Martonosi, M., Chong, F.T. Optimized surface code communication in superconducting quantum computers. In Proceedings of the 50th Annual IEEE/ACM International Symposium on Microarchitecture, MICRO-50'17, ACM, New York, NY, USA, 2017, 692--705.Google ScholarDigital Library
- Kaufmann, H., Ruster, T., Schmiegelow, C.T., Luda, M.A., Kaushal, V., Schulz, J., von Lindenfels, D., Schmidt-Kaler, F., Poschinger, U.G. Fast ion swapping for quantum-information processing. Phys. Rev. A 95 (2017), 052319.Google ScholarCross Ref
- Kaushal, V., Lekitsch, B., Stahl, A., Hilder, J., Pijn, D., Schmiegelow, C., Bermudez, A., Müller, M., Schmidt-Kaler, F., Poschinger, U. Shuttling-based trapped-ion quantum information processing. AVS Quant. Sci. 2, 1 (2020), 014101.Google Scholar
- Kielpinski, D., Monroe, C., Wineland, D.J. Architecture for a large-scale ion-trap quantum computer. Nature 417, 6890 (2002), 709--711.Google ScholarCross Ref
- Leung, P.H., Brown, K.R. Entangling an arbitrary pair of qubits in a long ion crystal. Phys. Rev. A 98, 3 (2018), 032318.Google ScholarCross Ref
- Leung, P.H., Landsman, K.A., Figgatt, C., Linke, N.M., Monroe, C., Brown, K.R. Robust 2-qubit gates in a linear ion crystal using a frequency-modulated driving force. Phys. Rev. Lett. 120, 2 (2018), 020501.Google ScholarCross Ref
- Li, G., Ding, Y., Xie, Y. Towards efficient superconducting quantum processor architecture design. In Proceedings of the Twenty-Fifth International Conference on Architectural Support for Programming Languages and Operating Systems, ASPLOS'20, Association for Computing Machinery, New York, NY, USA, 2020, 1031--1045.Google ScholarDigital Library
- Maunz, P. High Optical Access Trap 2.0. Technical report, Sandia National Lab, SAND-2016-0796R, 2016.Google Scholar
- Milne, A.R., Edmunds, C.L., Hempel, C., Roy, F., Mavadia, S., Biercuk, M.J. Phase-modulated entangling gates robust to static and time-varying errors. arXiv:1808.10462 (2018).Google Scholar
- Monroe, C., Kim, J. Scaling the ion trap quantum processor. Science 339, 6124 (2013), 1164--1169.Google ScholarCross Ref
- Murali, P., Debroy, D.M., Brown, K.R., Martonosi, M. Architecting noisy intermediate-scale trapped ion quantum computers. In Proceedings of the ACM/IEEE 47th Annual International Symposium on Computer Architecture, ISCA'20, IEEE Press, Virtual Conference, 2020, 529--542.Google ScholarDigital Library
- Murali, P., Linke, N.M., Martonosi, M., Javadi-Abhari, A., Nguyen, N.H., Alderete, C.H. Full-stack, real-system quantum computer studies: architectural comparisons and design insights. In Proceedings of the 46th International Symposium on Computer Architecture, ISCA'19, ACM, New York, NY, USA, 2019, 527--540.Google ScholarDigital Library
- Pino, J.M., Dreiling, J.M., Figgatt, C., Gaebler, J.P., Moses, S.A., Allman, M.S., Baldwin, C.H., Foss-Feig, M., Hayes, D., Mayer, K., Ryan-Anderson, C., Neyenhuis, B. Demonstration of the trapped-ion quantum CCD computer architecture. Nature 592, 7853 (2021), 209--213.Google ScholarCross Ref
- Sørensen, A., Mølmer, K. Quantum computation with ions in thermal motion. Phys. Rev. Lett. 82 (1999), 1971--1974.Google ScholarCross Ref
- Trout, C.J., Li, M., Gutiérrez, M., Wu, Y., Wang, S.-T., Duan, L., Brown, K.R. Simulating the performance of a distance-3 surface code in a linear ion trap. New J. Phys. 20, 4 (2018), 043038.Google ScholarCross Ref
- Wan, Y., Jördens, R., Erickson, S.D., Wu, J.J., Bowler, R., Tan, T.R., Hou, P.-Y., Wineland, D.J., Wilson, A.C., Leibfried, D. Ion transport and reordering in a 2d trap array. Adv. Quant. Technol. 3, 11 (2020), 2000028.Google Scholar
- Wright, K., Beck, K.M., Debnath, S., Amini, J.M., Nam, Y., Grzesiak, N., Chen, J.-S., Pisenti, N.C., Chmielewski, M., Collins, C., Hudek, K.M., Mizrahi, J., Wong-Campos, J.D., Allen, S., Apisdorf, J., Solomon, P., Williams, M., Ducore, A.M., Blinov, A., Kreikemeier, S.M., Chaplin, V., Keesan, M., Monroe, C., Kim, J. Benchmarking an 11-qubit quantum computer. Nat. Commun. 10, 1 (2019), 5464.Google Scholar
- Wu, Y., Wang, S.-T., Duan, L.-M. Noise analysis for high-fidelity quantum entangling gates in an anharmonic linear paul trap. Phys. Rev. A 97, 6 (2018), 062325.Google ScholarCross Ref
Index Terms
- Toward systematic architectural design of near-term trapped ion quantum computers
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