A phononic interface between a superconducting quantum processor and quantum networked spin memories

Neuman, Tomáš; Eichenfield, Matt; Trusheim, Matthew E.; Hackett, Lisa; Narang, Prineha; Englund, Dirk

doi:10.1038/s41534-021-00457-4

Cited by 34 publications

(32 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If we can use multiple quantum spin memories [21] as shown in Fig. 5, we can prepare the remote entanglement between electron spins during the BSM of another spin memory.…”

Section: Entanglement Generation Between Remote Superconducting Qubitsmentioning

confidence: 99%

“…Here, we numerically calculate the absorption (emission) efficiency of a microwave time-bin photon by the electron spin following the formulation in Ref. [21]. As mentioned in the main text, the spin is coupled to a vibration mode of the optomechanical cavity via mechanicalspin coupling, g m-e .…”

Section: Appendix B: Transmission Efficiency Of Optical Photon Emitte...mentioning

confidence: 99%

“…Assuming that g m-e /2π can reach 1-10 MHz using a color center with high strain susceptibility (∼1 PHz/strain) with a phononic crystal cavity [21], Ω 0 /2π ∼ 1 GHz [56], and ω m /2π = 5 − 10 GHz, Ω eff sb /2π becomes 0. For a color center whose ground state has high strain sensitivity (e.g., NV 0 , SiV − ), a procedure to absorb a microwave time-bin qubit is shown in Fig.…”

Section: Appendix B: Transmission Efficiency Of Optical Photon Emitte...mentioning

confidence: 99%

“…In this article, we introduce a scheme to generate entanglement between superconducting qubits in different refrigerators via a quantum memory. To analyze the scheme's performance, we consider a specific situation : generating entanglement between remote superconducting qubits using a quantum interface [21] consisting of a color center in diamond, a microwave resonator, and an optomechanical cavity. Assuming the current state-ofthe-art technologies, we estimate the entanglement generation rate of the memory-based scheme.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Remote Entanglement of Superconducting Qubits via Solid-State Spin Quantum Memories

Kurokawa¹,

Moyuki²,

Sekiguchi³

et al. 2022

Preprint

View full text Add to dashboard Cite

Quantum communication between remote superconducting systems is being studied intensively to increase the number of integrated superconducting qubits and to realize a distributed quantum computer. Since optical photons must be used for communication outside a dilution refrigerator, the direct conversion of microwave photons to optical photons has been widely investigated. However, the direct conversion approach suffers from added photon noise, heating due to a strong optical pump, and the requirement for large cooperativity. Instead, for quantum communication between superconducting qubits, we propose an entanglement distribution scheme using a solid-state spin quantum memory that works as an interface for both microwave and optical photons. The quantum memory enables quantum communication without significant heating inside the refrigerator, in contrast to schemes using high-power optical pumps. Moreover, introducing the quantum memory naturally makes it possible to herald entanglement and parallelization using multiple memories.

show abstract

“…If we can use multiple quantum spin memories [21] as shown in Fig. 5, we can prepare the remote entanglement between electron spins during the BSM of another spin memory.…”

Section: Entanglement Generation Between Remote Superconducting Qubitsmentioning

confidence: 99%

Section: Appendix B: Transmission Efficiency Of Optical Photon Emitte...mentioning

confidence: 99%

Section: Appendix B: Transmission Efficiency Of Optical Photon Emitte...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Remote Entanglement of Superconducting Qubits via Solid-State Spin Quantum Memories

Kurokawa¹,

Moyuki²,

Sekiguchi³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…On the other hand, phonon, the quanta of mechanical vibration, is regarded as an alternative quantum information carrier [28][29][30][31][32][33][34][35][36][37][38][39]. The spin-mechanical hybrid systems may overcome the shortcoming of vacuum radiations in nanophotonic structures, because phonons do not decay into free-space.…”

Section: Introductionmentioning

confidence: 99%

Chiral spin-phonon bound states and spin-spin interactions with phononic lattices

Dong¹,

Shen²,

Gao³

et al. 2021

Preprint

View full text Add to dashboard Cite

Designing unconventional interactions between single phonons and spins is fascinating for its applications in quantum phononics. Here, we propose a reliable scheme for coupling spins and phonons in phononic dimer and trimer lattices, with the combination of solid-state defects and diamond phononic (optomechanical) crystals. The dimer and trimer lattices used are an array of coupled phononic cavities with spatially modulated hopping rates. We predict a series of unconventional sound-matter interaction phenomena in this hybrid quantum system. In the dimer lattice, we show the formation of chiral spin-phonon bound states and topology-dependent phononic collective radiation. While in the trimer lattice, chiral bound states still exist and the spin relaxation is sublattice-dependent. The chiral bound states existed in both types of lattices are robust to large amount of disorder, which can mediate chiral and robust spin-spin interactions. This work provides a promising platform for phonon-based quantum information processing and quantum simulation.

show abstract

‘Sawfish’ Photonic Crystal Cavity for Near‐Unity Emitter‐to‐Fiber Interfacing in Quantum Network Applications

Bopp,

Plock,

Turan

et al. 2023

Advanced Optical Materials

View full text Add to dashboard Cite

Photon loss is one of the key challenges to overcome in complex photonic quantum applications. Photon collection efficiencies directly impact the amount of resources required for measurement‐based quantum computation and communication networks. Promising resources include solid‐state quantum light sources. However, efficiently coupling light from a single quantum emitter to a guided mode remains demanding. In this work, photon losses are eliminated by maximizing coupling efficiencies in an emitter‐to‐fiber interface. A waveguide‐integrated ‘Sawfish’ photonic crystal cavity is developed and finite element (FEM) simulations are employed to demonstrate that such an emitter‐to‐fiber interface transfers, with 97.4 % efficiency, the zero‐phonon line (ZPL) emission of a negatively‐charged tin vacancy center in diamond (SnV−) adiabatically to a single‐mode fiber. A surrogate model trained by machine learning provides quantitative estimates of sensitivities to fabrication tolerances. The corrugation‐based Sawfish design proves robust under state‐of‐the‐art nanofabrication parameters, maintaining an emitter‐to‐fiber coupling efficiency of 88.6 %. Applying the Sawfish cavity to a recent one‐way quantum repeater protocol substantiates its potential in reducing resource requirements in quantum communication.

show abstract

A phononic interface between a superconducting quantum processor and quantum networked spin memories

Cited by 34 publications

References 69 publications

Remote Entanglement of Superconducting Qubits via Solid-State Spin Quantum Memories

Remote Entanglement of Superconducting Qubits via Solid-State Spin Quantum Memories

Chiral spin-phonon bound states and spin-spin interactions with phononic lattices

‘Sawfish’ Photonic Crystal Cavity for Near‐Unity Emitter‐to‐Fiber Interfacing in Quantum Network Applications

Contact Info

Product

Resources

About