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  1. Article ; Online: Dynamics of magnetization at infinite temperature in a Heisenberg spin chain.

    Rosenberg, E / Andersen, T I / Samajdar, R / Petukhov, A / Hoke, J C / Abanin, D / Bengtsson, A / Drozdov, I K / Erickson, C / Klimov, P V / Mi, X / Morvan, A / Neeley, M / Neill, C / Acharya, R / Allen, R / Anderson, K / Ansmann, M / Arute, F /
    Arya, K / Asfaw, A / Atalaya, J / Bardin, J C / Bilmes, A / Bortoli, G / Bourassa, A / Bovaird, J / Brill, L / Broughton, M / Buckley, B B / Buell, D A / Burger, T / Burkett, B / Bushnell, N / Campero, J / Chang, H-S / Chen, Z / Chiaro, B / Chik, D / Cogan, J / Collins, R / Conner, P / Courtney, W / Crook, A L / Curtin, B / Debroy, D M / Barba, A Del Toro / Demura, S / Di Paolo, A / Dunsworth, A / Earle, C / Faoro, L / Farhi, E / Fatemi, R / Ferreira, V S / Burgos, L Flores / Forati, E / Fowler, A G / Foxen, B / Garcia, G / Genois, É / Giang, W / Gidney, C / Gilboa, D / Giustina, M / Gosula, R / Dau, A Grajales / Gross, J A / Habegger, S / Hamilton, M C / Hansen, M / Harrigan, M P / Harrington, S D / Heu, P / Hill, G / Hoffmann, M R / Hong, S / Huang, T / Huff, A / Huggins, W J / Ioffe, L B / Isakov, S V / Iveland, J / Jeffrey, E / Jiang, Z / Jones, C / Juhas, P / Kafri, D / Khattar, T / Khezri, M / Kieferová, M / Kim, S / Kitaev, A / Klots, A R / Korotkov, A N / Kostritsa, F / Kreikebaum, J M / Landhuis, D / Laptev, P / Lau, K-M / Laws, L / Lee, J / Lee, K W / Lensky, Y D / Lester, B J / Lill, A T / Liu, W / Locharla, A / Mandrà, S / Martin, O / Martin, S / McClean, J R / McEwen, M / Meeks, S / Miao, K C / Mieszala, A / Montazeri, S / Movassagh, R / Mruczkiewicz, W / Nersisyan, A / Newman, M / Ng, J H / Nguyen, A / Nguyen, M / Niu, M Y / O'Brien, T E / Omonije, S / Opremcak, A / Potter, R / Pryadko, L P / Quintana, C / Rhodes, D M / Rocque, C / Rubin, N C / Saei, N / Sank, D / Sankaragomathi, K / Satzinger, K J / Schurkus, H F / Schuster, C / Shearn, M J / Shorter, A / Shutty, N / Shvarts, V / Sivak, V / Skruzny, J / Smith, W Clarke / Somma, R D / Sterling, G / Strain, D / Szalay, M / Thor, D / Torres, A / Vidal, G / Villalonga, B / Heidweiller, C Vollgraff / White, T / Woo, B W K / Xing, C / Yao, Z Jamie / Yeh, P / Yoo, J / Young, G / Zalcman, A / Zhang, Y / Zhu, N / Zobrist, N / Neven, H / Babbush, R / Bacon, D / Boixo, S / Hilton, J / Lucero, E / Megrant, A / Kelly, J / Chen, Y / Smelyanskiy, V / Khemani, V / Gopalakrishnan, S / Prosen, T / Roushan, P

    Science (New York, N.Y.)

    2024  Volume 384, Issue 6691, Page(s) 48–53

    Abstract: Understanding universal aspects of quantum dynamics is an unresolved problem in statistical mechanics. In particular, the spin dynamics of the one-dimensional Heisenberg model were conjectured as to belong to the Kardar-Parisi-Zhang (KPZ) universality ... ...

    Abstract Understanding universal aspects of quantum dynamics is an unresolved problem in statistical mechanics. In particular, the spin dynamics of the one-dimensional Heisenberg model were conjectured as to belong to the Kardar-Parisi-Zhang (KPZ) universality class based on the scaling of the infinite-temperature spin-spin correlation function. In a chain of 46 superconducting qubits, we studied the probability distribution of the magnetization transferred across the chain's center, [Formula: see text]. The first two moments of [Formula: see text] show superdiffusive behavior, a hallmark of KPZ universality. However, the third and fourth moments ruled out the KPZ conjecture and allow for evaluating other theories. Our results highlight the importance of studying higher moments in determining dynamic universality classes and provide insights into universal behavior in quantum systems.
    Language English
    Publishing date 2024-04-04
    Publishing country United States
    Document type Journal Article
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.adi7877
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  2. Article ; Online: Stable quantum-correlated many-body states through engineered dissipation.

    Mi, X / Michailidis, A A / Shabani, S / Miao, K C / Klimov, P V / Lloyd, J / Rosenberg, E / Acharya, R / Aleiner, I / Andersen, T I / Ansmann, M / Arute, F / Arya, K / Asfaw, A / Atalaya, J / Bardin, J C / Bengtsson, A / Bortoli, G / Bourassa, A /
    Bovaird, J / Brill, L / Broughton, M / Buckley, B B / Buell, D A / Burger, T / Burkett, B / Bushnell, N / Chen, Z / Chiaro, B / Chik, D / Chou, C / Cogan, J / Collins, R / Conner, P / Courtney, W / Crook, A L / Curtin, B / Dau, A G / Debroy, D M / Del Toro Barba, A / Demura, S / Di Paolo, A / Drozdov, I K / Dunsworth, A / Erickson, C / Faoro, L / Farhi, E / Fatemi, R / Ferreira, V S / Burgos, L F / Forati, E / Fowler, A G / Foxen, B / Genois, É / Giang, W / Gidney, C / Gilboa, D / Giustina, M / Gosula, R / Gross, J A / Habegger, S / Hamilton, M C / Hansen, M / Harrigan, M P / Harrington, S D / Heu, P / Hoffmann, M R / Hong, S / Huang, T / Huff, A / Huggins, W J / Ioffe, L B / Isakov, S V / Iveland, J / Jeffrey, E / Jiang, Z / Jones, C / Juhas, P / Kafri, D / Kechedzhi, K / Khattar, T / Khezri, M / Kieferová, M / Kim, S / Kitaev, A / Klots, A R / Korotkov, A N / Kostritsa, F / Kreikebaum, J M / Landhuis, D / Laptev, P / Lau, K-M / Laws, L / Lee, J / Lee, K W / Lensky, Y D / Lester, B J / Lill, A T / Liu, W / Locharla, A / Malone, F D / Martin, O / McClean, J R / McEwen, M / Mieszala, A / Montazeri, S / Morvan, A / Movassagh, R / Mruczkiewicz, W / Neeley, M / Neill, C / Nersisyan, A / Newman, M / Ng, J H / Nguyen, A / Nguyen, M / Niu, M Y / O'Brien, T E / Opremcak, A / Petukhov, A / Potter, R / Pryadko, L P / Quintana, C / Rocque, C / Rubin, N C / Saei, N / Sank, D / Sankaragomathi, K / Satzinger, K J / Schurkus, H F / Schuster, C / Shearn, M J / Shorter, A / Shutty, N / Shvarts, V / Skruzny, J / Smith, W C / Somma, R / Sterling, G / Strain, D / Szalay, M / Torres, A / Vidal, G / Villalonga, B / Heidweiller, C V / White, T / Woo, B W K / Xing, C / Yao, Z J / Yeh, P / Yoo, J / Young, G / Zalcman, A / Zhang, Y / Zhu, N / Zobrist, N / Neven, H / Babbush, R / Bacon, D / Boixo, S / Hilton, J / Lucero, E / Megrant, A / Kelly, J / Chen, Y / Roushan, P / Smelyanskiy, V / Abanin, D A

    Science (New York, N.Y.)

    2024  Volume 383, Issue 6689, Page(s) 1332–1337

    Abstract: Engineered dissipative reservoirs have the potential to steer many-body quantum systems toward correlated steady states useful for quantum simulation of high-temperature superconductivity or quantum magnetism. Using up to 49 superconducting qubits, we ... ...

    Abstract Engineered dissipative reservoirs have the potential to steer many-body quantum systems toward correlated steady states useful for quantum simulation of high-temperature superconductivity or quantum magnetism. Using up to 49 superconducting qubits, we prepared low-energy states of the transverse-field Ising model through coupling to dissipative auxiliary qubits. In one dimension, we observed long-range quantum correlations and a ground-state fidelity of 0.86 for 18 qubits at the critical point. In two dimensions, we found mutual information that extends beyond nearest neighbors. Lastly, by coupling the system to auxiliaries emulating reservoirs with different chemical potentials, we explored transport in the quantum Heisenberg model. Our results establish engineered dissipation as a scalable alternative to unitary evolution for preparing entangled many-body states on noisy quantum processors.
    Language English
    Publishing date 2024-03-21
    Publishing country United States
    Document type Journal Article
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.adh9932
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  3. Article ; Online: Noise-resilient edge modes on a chain of superconducting qubits.

    Mi, X / Sonner, M / Niu, M Y / Lee, K W / Foxen, B / Acharya, R / Aleiner, I / Andersen, T I / Arute, F / Arya, K / Asfaw, A / Atalaya, J / Bardin, J C / Basso, J / Bengtsson, A / Bortoli, G / Bourassa, A / Brill, L / Broughton, M /
    Buckley, B B / Buell, D A / Burkett, B / Bushnell, N / Chen, Z / Chiaro, B / Collins, R / Conner, P / Courtney, W / Crook, A L / Debroy, D M / Demura, S / Dunsworth, A / Eppens, D / Erickson, C / Faoro, L / Farhi, E / Fatemi, R / Flores, L / Forati, E / Fowler, A G / Giang, W / Gidney, C / Gilboa, D / Giustina, M / Dau, A G / Gross, J A / Habegger, S / Harrigan, M P / Hoffmann, M / Hong, S / Huang, T / Huff, A / Huggins, W J / Ioffe, L B / Isakov, S V / Iveland, J / Jeffrey, E / Jiang, Z / Jones, C / Kafri, D / Kechedzhi, K / Khattar, T / Kim, S / Kitaev, A Y / Klimov, P V / Klots, A R / Korotkov, A N / Kostritsa, F / Kreikebaum, J M / Landhuis, D / Laptev, P / Lau, K-M / Lee, J / Laws, L / Liu, W / Locharla, A / Martin, O / McClean, J R / McEwen, M / Meurer Costa, B / Miao, K C / Mohseni, M / Montazeri, S / Morvan, A / Mount, E / Mruczkiewicz, W / Naaman, O / Neeley, M / Neill, C / Newman, M / O'Brien, T E / Opremcak, A / Petukhov, A / Potter, R / Quintana, C / Rubin, N C / Saei, N / Sank, D / Sankaragomathi, K / Satzinger, K J / Schuster, C / Shearn, M J / Shvarts, V / Strain, D / Su, Y / Szalay, M / Vidal, G / Villalonga, B / Vollgraff-Heidweiller, C / White, T / Yao, Z / Yeh, P / Yoo, J / Zalcman, A / Zhang, Y / Zhu, N / Neven, H / Bacon, D / Hilton, J / Lucero, E / Babbush, R / Boixo, S / Megrant, A / Chen, Y / Kelly, J / Smelyanskiy, V / Abanin, D A / Roushan, P

    Science (New York, N.Y.)

    2022  Volume 378, Issue 6621, Page(s) 785–790

    Abstract: Inherent symmetry of a quantum system may protect its otherwise fragile states. Leveraging such protection requires testing its robustness against uncontrolled environmental interactions. Using 47 superconducting qubits, we implement the one-dimensional ... ...

    Abstract Inherent symmetry of a quantum system may protect its otherwise fragile states. Leveraging such protection requires testing its robustness against uncontrolled environmental interactions. Using 47 superconducting qubits, we implement the one-dimensional kicked Ising model, which exhibits nonlocal Majorana edge modes (MEMs) with [Formula: see text] parity symmetry. We find that any multiqubit Pauli operator overlapping with the MEMs exhibits a uniform late-time decay rate comparable to single-qubit relaxation rates, irrespective of its size or composition. This characteristic allows us to accurately reconstruct the exponentially localized spatial profiles of the MEMs. Furthermore, the MEMs are found to be resilient against certain symmetry-breaking noise owing to a prethermalization mechanism. Our work elucidates the complex interplay between noise and symmetry-protected edge modes in a solid-state environment.
    Language English
    Publishing date 2022-11-17
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.abq5769
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  4. Article ; Online: Formation of robust bound states of interacting microwave photons.

    Morvan, A / Andersen, T I / Mi, X / Neill, C / Petukhov, A / Kechedzhi, K / Abanin, D A / Michailidis, A / Acharya, R / Arute, F / Arya, K / Asfaw, A / Atalaya, J / Bardin, J C / Basso, J / Bengtsson, A / Bortoli, G / Bourassa, A / Bovaird, J /
    Brill, L / Broughton, M / Buckley, B B / Buell, D A / Burger, T / Burkett, B / Bushnell, N / Chen, Z / Chiaro, B / Collins, R / Conner, P / Courtney, W / Crook, A L / Curtin, B / Debroy, D M / Del Toro Barba, A / Demura, S / Dunsworth, A / Eppens, D / Erickson, C / Faoro, L / Farhi, E / Fatemi, R / Flores Burgos, L / Forati, E / Fowler, A G / Foxen, B / Giang, W / Gidney, C / Gilboa, D / Giustina, M / Grajales Dau, A / Gross, J A / Habegger, S / Hamilton, M C / Harrigan, M P / Harrington, S D / Hoffmann, M / Hong, S / Huang, T / Huff, A / Huggins, W J / Isakov, S V / Iveland, J / Jeffrey, E / Jiang, Z / Jones, C / Juhas, P / Kafri, D / Khattar, T / Khezri, M / Kieferová, M / Kim, S / Kitaev, A Y / Klimov, P V / Klots, A R / Korotkov, A N / Kostritsa, F / Kreikebaum, J M / Landhuis, D / Laptev, P / Lau, K-M / Laws, L / Lee, J / Lee, K W / Lester, B J / Lill, A T / Liu, W / Locharla, A / Malone, F / Martin, O / McClean, J R / McEwen, M / Meurer Costa, B / Miao, K C / Mohseni, M / Montazeri, S / Mount, E / Mruczkiewicz, W / Naaman, O / Neeley, M / Nersisyan, A / Newman, M / Nguyen, A / Nguyen, M / Niu, M Y / O'Brien, T E / Olenewa, R / Opremcak, A / Potter, R / Quintana, C / Rubin, N C / Saei, N / Sank, D / Sankaragomathi, K / Satzinger, K J / Schurkus, H F / Schuster, C / Shearn, M J / Shorter, A / Shvarts, V / Skruzny, J / Smith, W C / Strain, D / Sterling, G / Su, Y / Szalay, M / Torres, A / Vidal, G / Villalonga, B / Vollgraff-Heidweiller, C / White, T / Xing, C / Yao, Z / Yeh, P / Yoo, J / Zalcman, A / Zhang, Y / Zhu, N / Neven, H / Bacon, D / Hilton, J / Lucero, E / Babbush, R / Boixo, S / Megrant, A / Kelly, J / Chen, Y / Smelyanskiy, V / Aleiner, I / Ioffe, L B / Roushan, P

    Nature

    2022  Volume 612, Issue 7939, Page(s) 240–245

    Abstract: Systems of correlated particles appear in many fields of modern science and represent some of the most intractable computational problems in nature. The computational challenge in these systems arises when interactions become comparable to other energy ... ...

    Abstract Systems of correlated particles appear in many fields of modern science and represent some of the most intractable computational problems in nature. The computational challenge in these systems arises when interactions become comparable to other energy scales, which makes the state of each particle depend on all other particles
    Language English
    Publishing date 2022-12-07
    Publishing country England
    Document type Journal Article
    ZDB-ID 120714-3
    ISSN 1476-4687 ; 0028-0836
    ISSN (online) 1476-4687
    ISSN 0028-0836
    DOI 10.1038/s41586-022-05348-y
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  5. Book ; Online: Purification-based quantum error mitigation of pair-correlated electron simulations

    O'Brien, T. E. / Anselmetti, G. / Gkritsis, F. / Elfving, V. E. / Polla, S. / Huggins, W. J. / Oumarou, O. / Kechedzhi, K. / Abanin, D. / Acharya, R. / Aleiner, I. / Allen, R. / Andersen, T. I. / Anderson, K. / Ansmann, M. / Arute, F. / Arya, K. / Asfaw, A. / Atalaya, J. /
    Bacon, D. / Bardin, J. C. / Bengtsson, A. / Boixo, S. / Bortoli, G. / Bourassa, A. / Bovaird, J. / Brill, L. / Broughton, M. / Buckley, B. / Buell, D. A. / Burger, T. / Burkett, B. / Bushnell, N. / Campero, J. / Chen, Y. / Chen, Z. / Chiaro, B. / Chik, D. / Cogan, J. / Collins, R. / Conner, P. / Courtney, W. / Crook, A. L. / Curtin, B. / Debroy, D. M. / Demura, S. / Drozdov, I. / Dunsworth, A. / Erickson, C. / Faoro, L. / Farhi, E. / Fatemi, R. / Ferreira, V. S. / Burgos, L. Flores / Forati, E. / Fowler, A. G. / Foxen, B. / Giang, W. / Gidney, C. / Gilboa, D. / Giustina, M. / Gosula, R. / Dau, A. Grajales / Gross, J. A. / Habegger, S. / Hamilton, M. C. / Hansen, M. / Harrigan, M. P. / Harrington, S. D. / Heu, P. / Hilton, J. / Hoffmann, M. R. / Hong, S. / Huang, T. / Huff, A. / Ioffe, L. B. / Isakov, S. V. / Iveland, J. / Jeffrey, E. / Jiang, Z. / Jones, C. / Juhas, P. / Kafri, D. / Kelly, J. / Khattar, T. / Khezri, M. / Kieferová, M. / Kim, S. / Klimov, P. V. / Klots, A. R. / Kothari, R. / Korotkov, A. N. / Kostritsa, F. / Kreikebaum, J. M. / Landhuis, D. / Laptev, P. / Lau, K. / Laws, L. / Lee, J. / Lee, K. / Lester, B. J. / Lill, A. T. / Liu, W. / Livingston, W. P. / Locharla, A. / Lucero, E. / Malone, F. D. / Mandra, S. / Martin, O. / Martin, S. / McClean, J. R. / McCourt, T. / McEwen, M. / Megrant, A. / Mi, X. / Mieszala, A. / Miao, K. C. / Mohseni, M. / Montazeri, S. / Morvan, A. / Movassagh, R. / Mruczkiewicz, W. / Naaman, O. / Neeley, M. / Neill, C. / Nersisyan, A. / Neven, H. / Newman, M. / Ng, J. H. / Nguyen, A. / Nguyen, M. / Niu, M. Y. / Omonije, S. / Opremcak, A. / Petukhov, A. / Potter, R. / Pryadko, L. P. / Quintana, C. / Rocque, C. / Roushan, P. / Saei, N. / Sank, D. / Sankaragomathi, K. / Satzinger, K. J. / Schurkus, H. F. / Schuster, C. / Shearn, M. J. / Shorter, A. / Shutty, N. / Shvarts, V. / Skruzny, J. / Smelyanskiy, V. / Smith, W. C. / Somma, R. / Sterling, G. / Strain, D. / Szalay, M. / Thor, D. / Torres, A. / Vidal, G. / Villalonga, B. / Heidweiller, C. Vollgraff / White, T. / Woo, B. W. K. / Xing, C. / Yao, Z. J. / Yeh, P. / Yoo, J. / Young, G. / Zalcman, A. / Zhang, Y. / Zhu, N. / Zobrist, N. / Gogolin, C. / Babbush, R. / Rubin, N. C.

    2022  

    Abstract: An important measure of the development of quantum computing platforms has been the simulation of increasingly complex physical systems. Prior to fault-tolerant quantum computing, robust error mitigation strategies are necessary to continue this growth. ... ...

    Abstract An important measure of the development of quantum computing platforms has been the simulation of increasingly complex physical systems. Prior to fault-tolerant quantum computing, robust error mitigation strategies are necessary to continue this growth. Here, we study physical simulation within the seniority-zero electron pairing subspace, which affords both a computational stepping stone to a fully correlated model, and an opportunity to validate recently introduced ``purification-based'' error-mitigation strategies. We compare the performance of error mitigation based on doubling quantum resources in time (echo verification) or in space (virtual distillation), on up to $20$ qubits of a superconducting qubit quantum processor. We observe a reduction of error by one to two orders of magnitude below less sophisticated techniques (e.g. post-selection); the gain from error mitigation is seen to increase with the system size. Employing these error mitigation strategies enables the implementation of the largest variational algorithm for a correlated chemistry system to-date. Extrapolating performance from these results allows us to estimate minimum requirements for a beyond-classical simulation of electronic structure. We find that, despite the impressive gains from purification-based error mitigation, significant hardware improvements will be required for classically intractable variational chemistry simulations.

    Comment: 10 pages, 13 page supplementary material, 12 figures. Experimental data available at https://doi.org/10.5281/zenodo.7225821
    Keywords Quantum Physics
    Subject code 710
    Publishing date 2022-10-19
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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