Decoherence-protected quantum register of nuclear spins in diamond

2022 ◽  
Author(s):  
Francisco Javier González ◽  
Raúl Coto
Keyword(s):  
Quantum Information ◽  
Coherence Time ◽  
Nitrogen Vacancy ◽  
Nuclear Spins ◽  
Practical Applications ◽  
Quantum Register ◽  
Nitrogen Vacancy Center ◽  
Simultaneous Control ◽  
Gate Time ◽  
And Control

Abstract Solid-state quantum registers are exceptional for storing quantum information at room temperature with long coherence time. Nevertheless, practical applications toward quantum supremacy require even longer coherence time to allow for more complex algorithms. In this work we propose a quantum register that lies in a decoherence-protected subspace to be implemented with nuclear spins nearby a Nitrogen-Vacancy center in diamond. The quantum information is encoded in two logical states composed of two Carbon-13 nuclear spins, while an electron spin is used as ancilla for initialization and control. Moreover, by tuning an off-axis magnetic field we enable non-nuclear-spin- preserving transitions that we use for preparing and manipulating the register through Stimulating Raman Adiabatic Passage. Furthermore, we consider more elaborated sequences to improve simultaneous control over the system yielding decreased gate time.

scholarly journals Room-temperature control and electrical readout of individual nitrogen-vacancy nuclear spins

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Michal Gulka ◽  
Daniel Wirtitsch ◽  
Viktor Ivády ◽  
Jelle Vodnik ◽  
Jaroslav Hruby ◽  
...  
Keyword(s):  
Dipolar Interaction ◽  
Coherence Time ◽  
Wide Bandgap ◽  
Nitrogen Vacancy ◽  
Ambient Conditions ◽  
Nuclear Spins ◽  
Quantum Device ◽  
Nanoscale Electronics ◽  
Quantum Processor ◽  
Processor Unit

AbstractNuclear spins in semiconductors are leading candidates for future quantum technologies, including quantum computation, communication, and sensing. Nuclear spins in diamond are particularly attractive due to their long coherence time. With the nitrogen-vacancy (NV) centre, such nuclear qubits benefit from an auxiliary electronic qubit, which, at cryogenic temperatures, enables probabilistic entanglement mediated optically by photonic links. Here, we demonstrate a concept of a microelectronic quantum device at ambient conditions using diamond as wide bandgap semiconductor. The basic quantum processor unit – a single 14N nuclear spin coupled to the NV electron – is read photoelectrically and thus operates in a manner compatible with nanoscale electronics. The underlying theory provides the key ingredients for photoelectric quantum gate operations and readout of nuclear qubit registers. This demonstration is, therefore, a step towards diamond quantum devices with a readout area limited by inter-electrode distance rather than by the diffraction limit. Such scalability could enable the development of electronic quantum processors based on the dipolar interaction of spin-qubits placed at nanoscopic proximity.

Teleportation of a controlled-NOT gate for photon and electron-spin qubits assisted by the nitrogen-vacancy center

2015 ◽  
Vol 15 (15&16) ◽  
pp. 1397-1419
Author(s):  
Ming-Xing Luo ◽  
Hui-Ran Li
Keyword(s):  
Electron Spin ◽  
Spin System ◽  
Room Temperature ◽  
Coherence Time ◽  
Nitrogen Vacancy ◽  
Cnot Gate ◽  
Long Distance ◽  
Two Photon ◽  
Nitrogen Vacancy Center ◽  
Vacancy Center

Teleportations of quantum gates are very important in the construction of quantum network and teleportation-based model of quantum computation. Assisted with nitrogenvacancy centers, we propose several schemes to teleport the quantum CNOT gate. Deterministic CNOT gate may be implemented on a remote two-photon system, remote two electron-spin system, hybrid photon-spin system or hybrid spin-photon system. Each photon only interacts with one spin each time. Moreover, quantum channel may be constructed by all combinations of the photon or electron-spin entanglement, or their hybrid entanglement. Since these electron-spin systems have experimentally shown a long coherence time even at the room temperature, our schemes provide useful ways for long-distance quantum applications.

Investigation of Coherence Time of a Nitrogen-Vacancy Center in Diamond Created by a Low-Energy Nitrogen Implantation

2017 ◽  
Vol 48 (6) ◽  
pp. 571-577 ◽  
Author(s):  
Chathuranga Abeywardana ◽  
Zaili Peng ◽  
Laura C. Mugica ◽  
Edward Kleinsasser ◽  
Kai-Mei C. Fu ◽  
...  
Keyword(s):  
Coherence Time ◽  
Low Energy ◽  
Nitrogen Vacancy ◽  
Nitrogen Implantation ◽  
Nitrogen Vacancy Center ◽  
Vacancy Center

scholarly journals Quantum interpolation for high-resolution sensing

2017 ◽  
Vol 114 (9) ◽  
pp. 2149-2153 ◽  
Author(s):  
Ashok Ajoy ◽  
Yi-Xiang Liu ◽  
Kasturi Saha ◽  
Luca Marseglia ◽  
Jean-Christophe Jaskula ◽  
...  
Keyword(s):  
Nitrogen Vacancy ◽  
Frequency Resolution ◽  
Chemical Information ◽  
Sensor Performance ◽  
Nitrogen Vacancy Center ◽  
Quantum Spins ◽  
Finite Sampling ◽  
And Control ◽  
Sampling Times ◽  
Vacancy Center

Recent advances in engineering and control of nanoscale quantum sensors have opened new paradigms in precision metrology. Unfortunately, hardware restrictions often limit the sensor performance. In nanoscale magnetic resonance probes, for instance, finite sampling times greatly limit the achievable sensitivity and spectral resolution. Here we introduce a technique for coherent quantum interpolation that can overcome these problems. Using a quantum sensor associated with the nitrogen vacancy center in diamond, we experimentally demonstrate that quantum interpolation can achieve spectroscopy of classical magnetic fields and individual quantum spins with orders of magnitude finer frequency resolution than conventionally possible. Not only is quantum interpolation an enabling technique to extract structural and chemical information from single biomolecules, but it can be directly applied to other quantum systems for superresolution quantum spectroscopy.

Quantum-entanglement storage and extraction in quantum network node

2018 ◽  
Vol 16 (01) ◽  
pp. 1850009 ◽  
Author(s):  
ZhuoYu Shan ◽  
Yong Zhang
Keyword(s):  
Information Processing ◽  
Quantum Information ◽  
Quantum Entanglement ◽  
Information Technologies ◽  
Quantum Information Processing ◽  
Bell State ◽  
Nitrogen Vacancy ◽  
Quantum Network ◽  
Nuclear Spins ◽  
Nv Centers

Quantum computing and quantum communication have become the most popular research topic. Nitrogen-vacancy (NV) centers in diamond have been shown the great advantage of implementing quantum information processing. The generation of entanglement between NV centers represents a fundamental prerequisite for all quantum information technologies. In this paper, we propose a scheme to realize the high-fidelity storage and extraction of quantum entanglement information based on the NV centers at room temperature. We store the entangled information of a pair of entangled photons in the Bell state into the nuclear spins of two NV centers, which can make these two NV centers entangled. And then we illuminate how to extract the entangled information from NV centers to prepare on-demand entangled states for optical quantum information processing. The strategy of engineering entanglement demonstrated here maybe pave the way towards a NV center-based quantum network.

scholarly journals Algorithmic decomposition for efficient multiple nuclear spin detection in diamond

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Hyunseok Oh ◽  
Jiwon Yun ◽  
M. H. Abobeih ◽  
Kyung-Hoon Jung ◽  
Kiho Kim ◽  
...  
Keyword(s):  
Hyperfine Interaction ◽  
Nuclear Spin ◽  
Systematic Approach ◽  
Quantum Information Processing ◽  
Nitrogen Vacancy ◽  
Nuclear Spectroscopy ◽  
Nuclear Spins ◽  
Systematic Analysis ◽  
And Control ◽  
Spin Detection

Abstract Efficiently detecting and characterizing individual spins in solid-state hosts is an essential step to expand the fields of quantum sensing and quantum information processing. While selective detection and control of a few 13C nuclear spins in diamond have been demonstrated using the electron spin of nitrogen-vacancy (NV) centers, a reliable, efficient, and automatic characterization method is desired. Here, we develop an automated algorithmic method for decomposing spectral data to identify and characterize multiple nuclear spins in diamond. We demonstrate efficient nuclear spin identification and accurate reproduction of hyperfine interaction components for both virtual and experimental nuclear spectroscopy data. We conduct a systematic analysis of this methodology and discuss the range of hyperfine interaction components of each nuclear spin that the method can efficiently detect. The result demonstrates a systematic approach that automatically detects nuclear spins with the aid of computational methods, facilitating the future scalability of devices.

scholarly journals Spin Readout Techniques of the Nitrogen-Vacancy Center in Diamond

Micromachines ◽  
2018 ◽  
Vol 9 (9) ◽  
pp. 437 ◽  
Author(s):  
David Hopper ◽  
Henry Shulevitz ◽  
Lee Bassett
Keyword(s):  
Quantum Information ◽  
Electron Spin ◽  
Room Temperature ◽  
Information Science ◽  
Nitrogen Vacancy ◽  
Single Shot ◽  
Spin Coherence ◽  
Quantum Information Science ◽  
Nitrogen Vacancy Center ◽  
Vacancy Center

The diamond nitrogen-vacancy (NV) center is a leading platform for quantum information science due to its optical addressability and room-temperature spin coherence. However, measurements of the NV center’s spin state typically require averaging over many cycles to overcome noise. Here, we review several approaches to improve the readout performance and highlight future avenues of research that could enable single-shot electron-spin readout at room temperature.

Sign in / Sign up

Export Citation Format

Share Document