Measurement-induced long-distance entanglement of superconducting qubits using optomechanical transducers

Černotík, Ondřej; Hammerer, Klemens

doi:10.1103/physreva.94.012340

Cited by 33 publications

(21 citation statements)

References 78 publications

(127 reference statements)

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“…Direct integration of phononic modes with microwave qubits could improve efficiency in optically addressing the latter 74,75 . Advanced protocols can circumvent stringent requirements on the system's frequency hierarchy 76 . And more options exist for the delicate choice of materials, including large-bandgap piezoelectrics such as GaP.…”

Section: Applications To Signal Transductionmentioning

confidence: 99%

Nano-opto-electro-mechanical systems

2018

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A new class of hybrid systems that couple optical, electrical and mechanical degrees of freedom in nanoscale devices is under development in laboratories worldwide. These nano-opto-electromechanical systems (NOEMS) offer unprecedented opportunities to dynamically control the flow of light in nanophotonic structures, at high speed and low power consumption. Drawing on conceptual and technological advances from cavity optomechanics, they also bear the potential for highly efficient, low-noise transducers between microwave and optical signals, both in the classical and quantum domains. This Progress Article discusses the fundamental physical limits of NOEMS, reviews the recent progress in their implementation, and suggests potential avenues for further developments in this field.2

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Section: Applications To Signal Transductionmentioning

confidence: 99%

Nano-opto-electro-mechanical systems

2018

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“…To create this entanglement is clearly a major challenge, and coherent coupling has so far only been achieved to varying degrees between various components. We will now briefly describe a few technical approaches to the central oscillator components: piezoelectric optomechanical oscillator [246], micromechanical membrane oscillator [247][248][249][250], collective spin (magnon) oscillator [235,236,[251][252][253], and SAW [243].…”

Section: Quantum Interfaces To Flying Qubits (Dv7)mentioning

confidence: 99%

Quantum information processing with superconducting circuits: a review

2017

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During the last ten years, superconducting circuits have passed from being interesting physical devices to becoming contenders for near-future useful and scalable quantum information processing (QIP). Advanced quantum simulation experiments have been shown with up to nine qubits, while a demonstration of quantum supremacy with fifty qubits is anticipated in just a few years. Quantum supremacy means that the quantum system can no longer be simulated by the most powerful classical supercomputers. Integrated classical-quantum computing systems are already emerging that can be used for software development and experimentation, even via web interfaces. Therefore, the time is ripe for describing some of the recent development of superconducting devices, systems and applications. As such, the discussion of superconducting qubits and circuits is limited to devices that are proven useful for current or near future applications. Consequently, the centre of interest is the practical applications of QIP, such as computation and simulation in Physics and Chemistry.

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“…8], we note that the current responses of the various sideband loops I l (Ω) to the input fields can be determined by straightforward generalization of Eq. (55). Combining these with the input-output relations (49,50,92,93) yields the scattering matrix between the sidebands of the electrical and optical transmission lines (as well as the noise sources).…”

Section: Example Of Applicationmentioning

confidence: 99%

“…Hence both optomechanics and electromechanics are mature research directions offering quantum-level operation. By combining the two, they would therefore offer a promising platform for quantum transduction between electrical and optical frequencies [49][50][51][52][53] allowing loss-and noiseless conversion of quantum states, but also the generation of, e.g., two-mode squeezed hybrid states of light and microwaves for continuous-variable teleportation [54] and entanglement between distant superconducting qubits by transducer-mediated interaction with a common propagating optical field [55]. In fact, optomechanical interfaces suitable for integration with electrical circuits have already been devised [56][57][58][59][60][61][62][63][64][65][66][67][68].…”

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confidence: 99%

Electrooptomechanical Equivalent Circuits for Quantum Transduction

2018

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Using the techniques of optomechanics, a high-Q mechanical oscillator may serve as a link between electromagnetic modes of vastly different frequencies. This approach has successfully been exploited for the frequency conversion of classical signals and has the potential of performing quantum state transfer between superconducting circuitry and a traveling optical signal. Such transducers are often operated in a linear regime, where the hybrid system can be described using linear response theory based on the Heisenberg-Langevin equations. While mathematically straightforward to solve, this approach yields little intuition about the dynamics of the hybrid system to aid the optimization of the transducer. As an analysis and design tool for such electro-optomechanical transducers, we introduce an equivalent circuit formalism, where the entire transducer is represented by an electrical circuit. Thereby we integrate the transduction functionality of optomechanical (OM) systems into the toolbox of electrical engineering allowing the use of its well-established design techniques. This unifying impedance description can be applied both for static (DC) and harmonically varying (AC) drive fields, accommodates arbitrary linear circuits, and is not restricted to the resolved-sideband regime. Furthermore, by establishing the quantized input-output formalism for the equivalent circuit, we obtain the scattering matrix for linear transducers using circuit analysis, and thereby have a complete quantum mechanical characterization of the transducer. Hence, this mapping of the entire transducer to the language of electrical engineering both sheds light on how the transducer performs and can at the same time be used to optimize its performance by aiding the design of a suitable electrical circuit. CONTENTS

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Measurement-induced long-distance entanglement of superconducting qubits using optomechanical transducers

Cited by 33 publications

References 78 publications

Nano-opto-electro-mechanical systems

Nano-opto-electro-mechanical systems

Quantum information processing with superconducting circuits: a review

Electrooptomechanical Equivalent Circuits for Quantum Transduction

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