Optical Fredkin gate assisted by quantum dot within optical cavity under vacuum noise and sideband leakage

There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

Abstract

We propose a deterministic Fredkin gate which can accomplish controlled-swap operation between three-qubit states. The proposed Fredkin gate consists of a photonic system (single photon) and quantum dots (QDs) confined in single-sided cavities (two electron spin states). In our scheme, the control qubit is the polarization state of the single photon, and two electron spin states in QDs play the role of target qubits (swapped states by control qubit). The interaction between a photon and an electron of QD within the cavity (QD-cavity system) significantly affects the performance of Fredkin gate. Thus, through the analysis of the QD-cavity system under vacuum noise and sideband leakage, we demonstrate that reliable interaction and performance of the QD-cavity system with photonic state (photon) can be acquired in our scheme. Consequently, the Fredkin gate proposed in this paper can be experimentally implemented with high feasibility and efficiency.

Related collections

Most cited references 66

Record: found
Abstract: found
Article: not found

Complete quantum control of a single quantum dot spin using ultrafast optical pulses.

David Press, Thaddeus D. Ladd, Bingyang Zhang … (2008)

A basic requirement for quantum information processing systems is the ability to completely control the state of a single qubit. For qubits based on electron spin, a universal single-qubit gate is realized by a rotation of the spin by any angle about an arbitrary axis. Driven, coherent Rabi oscillations between two spin states can be used to demonstrate control of the rotation angle. Ramsey interference, produced by two coherent spin rotations separated by a variable time delay, demonstrates control over the axis of rotation. Full quantum control of an electron spin in a quantum dot has previously been demonstrated using resonant radio-frequency pulses that require many spin precession periods. However, optical manipulation of the spin allows quantum control on a picosecond or femtosecond timescale, permitting an arbitrary rotation to be completed within one spin precession period. Recent work in optical single-spin control has demonstrated the initialization of a spin state in a quantum dot, as well as the ultrafast manipulation of coherence in a largely unpolarized single-spin state. Here we demonstrate complete coherent control over an initialized electron spin state in a quantum dot using picosecond optical pulses. First we vary the intensity of a single optical pulse to observe over six Rabi oscillations between the two spin states; then we apply two sequential pulses to observe high-contrast Ramsey interference. Such a two-pulse sequence realizes an arbitrary single-qubit gate completed on a picosecond timescale. Along with the spin initialization and final projective measurement of the spin state, these results demonstrate a complete set of all-optical single-qubit operations.

0 comments Cited 333 times – based on 0 reviews      Review now

Bookmark

Record: found
Abstract: found
Article: not found

Resonantly driven CNOT gate for electron spins

D. M. Zajac, A. J. Sigillito, M Russ … (2018)

Single qubit rotations and two-qubit CNOT operations are crucial ingredients for universal quantum computing. Although high fidelity single qubit operations have been achieved using the electron spin degree of freedom, realizing a robust CNOT gate has been challenging owing to rapid nuclear spin dephasing and charge noise. We demonstrate an efficient resonantly driven CNOT gate for electron spins in silicon. Our platform achieves single-qubit rotations with fidelities >99%, as verified by randomized benchmarking. Gate control of the exchange coupling allows a quantum CNOT gate to be implemented with resonant driving in ~200 ns. We use the CNOT gate to generate a Bell state with 78% fidelity (corrected for errors in state preparation and readout). Our quantum dot device architecture enables multi-qubit algorithms in silicon.

0 comments Cited 218 times – based on 0 reviews      Review now

Bookmark

Record: found
Abstract: found
Article: not found

Picosecond coherent optical manipulation of a single electron spin in a quantum dot.

J Berezovsky, M H Mikkelsen, N Stoltz … (2008)

Most schemes for quantum information processing require fast single-qubit operations. For spin-based qubits, this involves performing arbitrary coherent rotations of the spin state on time scales much faster than the spin coherence time. By applying off-resonant, picosecond-scale optical pulses, we demonstrated the coherent rotation of a single electron spin through arbitrary angles up to pi radians. We directly observed this spin manipulation using time-resolved Kerr rotation spectroscopy and found that the results are well described by a model that includes the electronnuclear spin interaction. Measurements of the spin rotation as a function of laser detuning and intensity confirmed that the optical Stark effect is the operative mechanism.

0 comments Cited 196 times – based on 0 reviews      Review now

Bookmark

All references

Author and article information

Contributors

Jino Heo:

ORCID: http://orcid.org/0000-0003-0946-7769

9876153@korea.ac.kr

Journal

Journal ID (nlm-ta): Sci Rep

Journal ID (iso-abbrev): Sci Rep

Title: Scientific Reports

Publisher: Nature Publishing Group UK (London )

ISSN (Electronic): 2045-2322

Publication date (Electronic): 20 March 2020

Publication date PMC-release: 20 March 2020

Publication date Collection: 2020

Volume: 10

Electronic Location Identifier: 5123

Affiliations

[1 ]ISNI 0000000121053345, GRID grid.35541.36, Center for Quantum Information, , Korea Institute of Science and Technology (KIST), ; Seoul, 02792 Republic of Korea

[2 ]Korean Intellectual Property Office, Government Complex Daejeon Building 4, 189, Cheongsa-ro, Seo-gu, Daejeon, 35208 Republic of Korea

[3 ]ISNI 0000 0000 9611 0917, GRID grid.254229.a, College of Electrical and Computer Engineering, , Chungbuk National University, ; Chungdae-ro 1, Seowon-Gu, Cheongju, Republic of Korea

[4 ]ISNI 0000 0001 0840 2678, GRID grid.222754.4, Institute of Natural Science, , Korea University, ; Sejong, 30091 Republic of Korea

[5 ]ISNI 0000 0004 1791 8264, GRID grid.412786.e, Division of Nano and Information Technology, Korea Institute of Science and Technology School, , Korea University of Science and Technology, ; Seoul, 02792 Republic of Korea

Author information

Jino Heo http://orcid.org/0000-0003-0946-7769

Article

Publisher ID: 61938

DOI: 10.1038/s41598-020-61938-8

PMC ID: 7083924

PubMed ID: 32198445

SO-VID: 207aa615-c283-437c-bfba-403f0dc7fba3

License:

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

History

Date received : 7 May 2019

Date accepted : 5 March 2020

Funding

Funded by: FundRef https://doi.org/10.13039/501100003725, National Research Foundation of Korea (NRF);

Award ID: 2019R1I1A1A01042699

Award ID: 2019R1A2C2006381

Award Recipient : Jino Heo Sang-Wook Han

Funded by: FundRef https://doi.org/10.13039/501100003693, Korea Institute of Science and Technology (KIST);

Award ID: 2E29580

Award Recipient : Sang-Wook Han

Custom metadata

ScienceOpen disciplines: Uncategorized

Keywords: quantum information,quantum optics

Data availability:

ScienceOpen disciplines: Uncategorized

Keywords: quantum information, quantum optics

Optical Fredkin gate assisted by quantum dot within optical cavity under vacuum noise and sideband leakage

Read this article at

Abstract

Related collections

Negative Pressure Wound Therapy

Most cited references 66

Complete quantum control of a single quantum dot spin using ultrafast optical pulses.

Resonantly driven CNOT gate for electron spins

Picosecond coherent optical manipulation of a single electron spin in a quantum dot.

Author and article information

Contributors

Journal

Affiliations

Author information

Article

History

Funding

Categories

Custom metadata

Comments

Comment on this article

Similar content 84

Cited by 2

Most referenced authors 655