Demonstration of universal parametric entangling gates on a multi-qubit lattice

Reagor, Matthew; Osborn, C. B.; Tezak, Nikolas; Staley, A.; Prawiroatmodjo, Guenevere E. D. K.; Scheer, Michael G.; Alidoust, Nasser; Sete, Eyob A.; Didier, Nicolas; Silva, Marcus; Acala, Ezer; Angeles, Joel; Bestwick, Andrew; Block, Melvin A.; Bloom, Benjamin; Bradley, Adam D.; Bui, Catvu; Caldwell, S.; Capelluto, Lauren; Chilcott, Rick; Cordova, Jeff; Crossman, Genya; Curtis, Michael J.; Deshpande, Saniya; Bouayadi, Tristan El; Girshovich, Daniel; Hong, Sabrina; Hudson, Alex; Karalekas, Peter J.; Kuang, Kat; Lenihan, Michael; Manenti, Riccardo; Manning, T. A.; Marshall, Jayss; Mohan, Yuvraj; O’Brien, William; Otterbach, Johannes; Papageorge, Alexander; Paquette, Jean-Philip; Pelstring, Michael; Polloreno, Anthony; Rawat, Vijay; Ryan, Colm A.; Renzas, Russ; Rubin, Nick; Russel, Damon; Rust, Michael J.; Scarabelli, Diego; Selvanayagam, Michael; Sinclair, Rodney; Smith, Robert S.; Suska, Mark; To, Ting-Wai; Vahidpour, Mehrnoosh; Vodrahalli, Nagesh; Whyland, Tyler; Yadav, Kamal; Zeng, William J.; Rigetti, Chad

doi:10.1126/sciadv.aao3603

Cited by 247 publications

(159 citation statements)

References 59 publications

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“…To implement fast gate operations with high-fidelity, as needed to implement quantum logic, many (though not all 63 ) of the quantum processor architectures implemented today feature tunable qubit frequencies [64][65][66][67] . For instance, in some cases, we need to bring two qubits into resonance to exchange (swap) energy, while we also need the capability of separating them during idling periods to minimize their interactions.…”

Section: Tunable Qubit: Split Transmonmentioning

confidence: 99%

“…Similarly, by a judicious use of the virtual-Z gate, it is also possible to reduce phase errors in combination with DRAG pulsing to reduce leakage 191 . Modern single-qubit gates using DRAG pulsing now routinely reach fidelities F 1qb 0.99 65,67,198,[201][202][203][204] . Other techniques also exist for operating single-qubit gates in a spectrally crowded device 205,206 .…”

Section: The Drag Schemementioning

confidence: 99%

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A quantum engineer's guide to superconducting qubits

Krantz

Kjærgaard

Yan

et al. 2019

Applied Physics Reviews

1,454

962

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The aim of this review is to provide quantum engineers with an introductory guide to the central concepts and challenges in the rapidly accelerating field of superconducting quantum circuits. Over the past twenty years, the field has matured from a predominantly basic research endeavor to one that increasingly explores the engineering of larger-scale superconducting quantum systems. Here, we review several foundational elements -qubit design, noise properties, qubit control, and readout techniques -developed during this period, bridging fundamental concepts in circuit quantum electrodynamics (cQED) and contemporary, stateof-the-art applications in gate-model quantum computation.

show abstract

Section: Tunable Qubit: Split Transmonmentioning

confidence: 99%

Section: The Drag Schemementioning

confidence: 99%

A quantum engineer's guide to superconducting qubits

Krantz

Kjærgaard

Yan

et al. 2019

Applied Physics Reviews

1,454

962

View full text Add to dashboard Cite

show abstract

“…experiments in multiple groups have demonstrated coherence times on the order of or even in excess of this requirement[32,34,35].…”

mentioning

confidence: 99%

Subradiant states of quantum bits coupled to a one-dimensional waveguide

et al. 2019

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The properties of coupled emitters can differ dramatically from those of their individual constituents. Canonical examples include sub-and super-radiance, wherein the decay rate of a collective excitation is reduced or enhanced due to correlated interactions with the environment. Here, we systematically study the properties of collective excitations for regularly spaced arrays of quantum emitters coupled to a one-dimensional waveguide. We find that, for low excitation numbers, the modal properties are well-characterized by spin waves with a definite wavevector. Moreover, the decay rate of the most subradiant modes obeys a universal scaling with a cubic suppression in the number of emitters. Multiexcitation subradiant eigenstates can be built from fermionic combinations of single excitation eigenstates; such 'fermionization' results in multiple excitations that spatially repel one another. We put forward a method to efficiently create and measure such subradiant states, which can be realized with superconducting qubits. These measurement protocols probe both real-space correlations (using on-site dispersive readout) and temporal correlations in the emitted field (using photon correlation techniques).

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“…We first review the used ac magnetic flux induced parametric tunable coupling, which can be implemented between a qubit and a quantum bus [48][49][50], or two qubits [51][52][53][54]. As shown in Fig.…”

Section: Tunable Interactionmentioning

confidence: 99%

Scalable nonadiabatic holonomic quantum computation on a superconducting qubit lattice

Chen

Xue

2019

Phys. Rev. A

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Geometric phase is an indispensable element for achieving robust and high-fidelity quantum gates due to its built-in noise-resilience feature. However, due to the complexity of manipulation and the intrinsic leakage of the encoded quantum information to non-logical-qubit basis, the experimental realization of universal nonadiabatic holonomic quantum computation is very difficult. Here, we propose to implement scalable nonadiabatic holonomic quantum computation with decoherence-free subspace encoding on a two-dimensional square superconducting transmon-qubit lattice, where only the two-body interaction of neighbouring qubits, from the simplest capacitive coupling, is needed. Meanwhile, we introduce qubit-frequency driving to achieve tunable resonant coupling for the neighbouring transmon qubits, and thus avoiding the leakage problem. In addition, our presented numerical simulation shows that high-fidelity quantum gates can be obtained, verifying the advantages of the robustness and scalability of our scheme. Therefore, our scheme provides a promising way towards the physical implementation of robust and scalable quantum computation.

show abstract

Demonstration of universal parametric entangling gates on a multi-qubit lattice

Abstract: Harnessing techniques from analog signal processing, we establish a new path for large-scale quantum computation.

Cited by 247 publications

References 59 publications

A quantum engineer's guide to superconducting qubits

A quantum engineer's guide to superconducting qubits

Subradiant states of quantum bits coupled to a one-dimensional waveguide

Scalable nonadiabatic holonomic quantum computation on a superconducting qubit lattice

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