Fast Multiqubit Gates by Adiabatic Evolution in Interacting Excited-State Manifolds of Rydberg Atoms and Superconducting Circuits

Khazali, Mohammadsadegh; Mølmer, Klaus

doi:10.1103/physrevx.10.021054

Cited by 100 publications

(88 citation statements)

References 92 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition to large connectivity, neutral atom devices present the advantage of natively implementing multi-qubit gates involving more that 2 qubits [4,5,17,23]. Such multi-qubit gates are instrumental for the efficient implementation of several quantum algorithms, including for example Grover search or the variational resolution of non-linear partial differential equations [24].…”

Section: Box 1 | Implementation Of the Cnot-gatementioning

confidence: 99%

Quantum computing with neutral atoms

Henriet¹,

Béguin²,

Signoles³

et al. 2020

Quantum

340

167

View full text Add to dashboard Cite

The manipulation of neutral atoms by light is at the heart of countless scientific discoveries in the field of quantum physics in the last three decades. The level of control that has been achieved at the single particle level within arrays of optical traps, while preserving the fundamental properties of quantum matter (coherence, entanglement, superposition), makes these technologies prime candidates to implement disruptive computation paradigms. In this paper, we review the main characteristics of these devices from atoms / qubits to application interfaces, and propose a classification of a wide variety of tasks that can already be addressed in a computationally efficient manner in the Noisy Intermediate Scale Quantum\cite{Preskill_NISQ} era we are in. We illustrate how applications ranging from optimization challenges to simulation of quantum systems can be explored either at the digital level (programming gate-based circuits) or at the analog level (programming Hamiltonian sequences). We give evidence of the intrinsic scalability of neutral atom quantum processors in the 100-1,000 qubits range and introduce prospects for universal fault tolerant quantum computing and applications beyond quantum computing.

show abstract

Section: Box 1 | Implementation Of the Cnot-gatementioning

confidence: 99%

Quantum computing with neutral atoms

Henriet¹,

Béguin²,

Signoles³

et al. 2020

Quantum

340

167

View full text Add to dashboard Cite

show abstract

“…The resonant DD interactions are considered to construct two- [37] and three-qubit [38] quantum logic gates by using of experimentally observed Förster resonance [39]. It has been shown that RAB can be used to limit the blockade error [40], and to construct the multiple qubit Toffoli and Fan-out gates in a fast way [41]. Recently, it has been shown that non-adiabatic dynamics around a conical intersection can be studied under the RAB condition with trapped Rydberg ions [42].…”

Section: Introductionmentioning

confidence: 99%

“…Although there are different level schemes to achieve DD interactions, it is not clear how to achieve the RAB condition for the many types of DD interactions between Rydberg atoms. Moreover existing schemes typically require two or more Rydberg atoms in the Rydberg state simultaneously for a period of time [37][38][39]41] or to stay in a dark state [43]. This could reduce coherence of the system due to, e.g.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dipole-dipole-interaction–driven antiblockade of two Rydberg atoms

2021

Phys. Rev. A

View full text Add to dashboard Cite

Resonant laser excitation of multiple Rydberg atoms are prohibited, leading to Rydberg blockade, when the long-range van der Waals interactions are stronger than the laser-atom coupling. Rydberg blockade can be violated, i.e. simultaneous excitation of more than one Rydberg atoms, by off-resonant laser excitation, causing an excitation antiblockade. Rydberg antiblockade gives rise to strongly correlated many-body dynamics and spin-orbit coupling, and also finds quantum computation applications. Instead of commonly used van der Waals interactions, we investigate antiblockade dynamics of two Rydberg atoms interacting via dipole-dipole exchange interactions. We study typical situations in current Rydberg atoms experiments, where different types of dipole-dipole interactions can be achieved by varying Rydberg state couplings. Effective Hamiltonian governing underlying antiblockade dynamics is derived. We illustrate that geometric gates can be realized with the Rydberg antiblockade which is robust against decay of Rydberg states. Our study may stimulate new experimental and theoretical exploration of quantum optics and strongly interacting many-body dynamics with Rydberg antiblockade driven by dipole-dipole interactions.

show abstract

“…Rydberg blockade has been demonstrated experimentally, [46,47] and employed to construct quantum gate [48][49][50][51][52][53][54] and generate quantum entanglement. [55,56] Moreover, recent theoretical works [57][58][59][60][61][62][63][64][65] and experimental progress [66][67][68][69][70][71][72][73][74][75] have indicated the great application value of Rydberg atoms in QIP. These studies lay a foundation for quantum computation based on Rydberg atoms.…”

Section: Introductionmentioning

confidence: 99%

Distinguishment of Greenberger–Horne–Zeilinger States in Rydberg Atoms via Noncyclic Geometric Quantum Computation

et al. 2021

View full text Add to dashboard Cite

Since quantum entanglement plays a crucial role in quantum information processing, analyzing entangled states is indispensable for practical applications. Here a simple and direct protocol to distinguish arbitrary N‐qubit Greenberger–Horne–Zeilinger (GHZ) states by novel nonadiabatic noncyclic geometric quantum computation using Rydberg atoms is put forward. The Bell states can also be distinguished completely using this way. The protocol is justified by numerical simulation for Bell states and N‐qubit GHZ states, which evaluates the robustness and shows gratifying results. In addition, the idea is flexible, that is, available in any platform. Due to its simplicity and easy operation, the scheme would be very useful in quantum information science both theoretically and experimentally.

show abstract

Fast Multiqubit Gates by Adiabatic Evolution in Interacting Excited-State Manifolds of Rydberg Atoms and Superconducting Circuits

Cited by 100 publications

References 92 publications

Quantum computing with neutral atoms

Quantum computing with neutral atoms

Dipole-dipole-interaction–driven antiblockade of two Rydberg atoms

Distinguishment of Greenberger–Horne–Zeilinger States in Rydberg Atoms via Noncyclic Geometric Quantum Computation

Contact Info

Product

Resources

About