Random-Access Quantum Memory Using Chirped Pulse Phase Encoding

O’Sullivan, James; Kennedy, Oscar W.; Debnath, Kamanasish; Alexander, Joseph; Zollitsch, Christoph W.; Šimėnas, Mantas; Hashim, Akel; Thomas, Christopher N.; Withington, S.; Siddiqi, Irfan; Mølmer, Klaus; Morton, John J. L.

doi:10.1103/physrevx.12.041014

Cited by 9 publications

(4 citation statements)

References 53 publications

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“…Under these conditions, the eigenstates of the spin Hamiltonian H = H A + H B are best given as F , m F , where F = S + I is the total spin and m F is its projection onto B 0 . Bismuth donors can have exceptional spin relaxation and coherence times, with T 1 > 1600 s ( 28 ) and T 2 as long as 700 ms ( 29 ), while the large zero-field splitting of the system 5 A /2π = 7.375 GHz makes it ideal for applications involving superconducting devices ( 30 , 31 ).…”

Section: Resultsmentioning

confidence: 99%

Latched detection of zeptojoule spin echoes with a kinetic inductance parametric oscillator

Vine,

Kringhøj,

Savytskyi

et al. 2024

Sci. Adv.

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When strongly pumped at twice their resonant frequency, nonlinear resonators develop a high-amplitude intracavity field, a phenomenon known as parametric self-oscillations. The boundary over which this instability occurs can be extremely sharp and thereby presents an opportunity for realizing a detector. Here, we operate such a device based on a superconducting microwave resonator whose nonlinearity is engineered from kinetic inductance. The device indicates the absorption of low-power microwave wavepackets by transitioning to a self-oscillating state. Using calibrated pulses, we measure the detection efficiency to zeptojoule energy wavepackets. We then apply it to measurements of electron spin resonance, using an ensemble of 209 Bi donors in silicon that are inductively coupled to the resonator. We achieve a latched readout of the spin signal with an amplitude that is five hundred times greater than the underlying spin echoes.

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Section: Resultsmentioning

confidence: 99%

Latched detection of zeptojoule spin echoes with a kinetic inductance parametric oscillator

Vine,

Kringhøj,

Savytskyi

et al. 2024

Sci. Adv.

View full text Add to dashboard Cite

show abstract

“…Huang et al [197], but it is essential for the development of quantum repeaters for quantum communication networks. Sullivan et al [198] investigate random-access quantum memory using chirpedpulse phase encoding. The protocol is implemented using donor spins in silicon coupled to a superconducting cavity, offering the potential for microwave random access quantum memories with lifetimes exceeding seconds.…”

Section: Useful Nisq Digital Quantum Advantage -Mission Impossible?mentioning

confidence: 99%

Quantum information processing with superconducting circuits: a perspective

Wendin¹

2023

Preprint

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The last five years have seen a dramatic evolution of platforms for quantum computing, taking the field from physics experiments to quantum hardware and software engineering. Nevertheless, despite this progress of quantum processors, the field is still in the noisy intermediate-scale quantum (NISQ) regime, seriously limiting the performance of software applications. Key issues involve how to achieve quantum advantage in useful applications for quantum optimization and materials science, connected to the concept of quantum supremacy first demonstrated by Google in 2019. In this article we will describe recent work to establish relevant benchmarks for quantum supremacy and quantum advantage, present recent work on applications of variational quantum algorithms for optimization and electronic structure determination, discuss how to achieve practical quantum advantage, and finally outline current work and ideas about how to scale up to competitive quantum systems.

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“…Centre for Nanotechnology and colleagues have taken an important step toward making quantum RAM a reality, demonstrating a hardware-efficient approach that uses chirped microwave pulses to store and retrieve quantum information in atomic spins [3].…”

Section: Credit: Aps/carin Cainmentioning

confidence: 99%

Chirping toward a Quantum RAM

Pla

2022

Physics

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Chirping toward a Quantum RAMA new quantum random-access memory device reads and writes information using a chirped electromagnetic pulse and a superconducting resonator, making it significantly more hardware-efficient than previous devices.By Jarryd Pla R andom-access memory (or RAM) is an integral part of a computer, acting as a short-term memory bank from which information can be quickly recalled. Applications on your phone or computer use RAM so that you can switch between tasks in the blink of an eye. Researchers working on building future quantum computers hope that such systems might one day operate with analogous quantum RAM elements, which they envision could speed up the execution of a quantum algorithm [1, 2] or increase the density of information storable in a quantum processor. Now James O'Sullivan of the London

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Random-Access Quantum Memory Using Chirped Pulse Phase Encoding

Cited by 9 publications

References 53 publications

Latched detection of zeptojoule spin echoes with a kinetic inductance parametric oscillator

Latched detection of zeptojoule spin echoes with a kinetic inductance parametric oscillator

Quantum information processing with superconducting circuits: a perspective

Chirping toward a Quantum RAM

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