A two-qubit photonic quantum processor and its application to solving systems of linear equations

Stefanie Barz; Ivan Kassal; Martin Ringbauer; Yannick Ole Lipp; Borivoje Dakic; Alan Aspuru-Guzik; Philip Walther

doi:10.1038/srep06115

A two-qubit photonic quantum processor and its application to solving systems of linear equations

Stefanie Barz (Corresponding author), Ivan Kassal, Martin Ringbauer, Yannick Ole Lipp, Borivoje Dakic, Alan Aspuru-Guzik, Philip Walther

Quantum Optics, Quantum Nanophysics and Quantum Information

Publications: Contribution to journal › Article › Peer Reviewed

Abstract

Large-scale quantum computers will require the ability to apply long sequences of entangling gates to many qubits. In a photonic architecture, where single-qubit gates can be performed easily and precisely, the application of consecutive two-qubit entangling gates has been a significant obstacle. Here, we demonstrate a two-qubit photonic quantum processor that implements two consecutive CNOT gates on the same pair of polarisation-encoded qubits. To demonstrate the flexibility of our system, we implement various instances of the quantum algorithm for solving of systems of linear equations.

Original language	English
Article number	6115
Number of pages	5
Journal	Scientific Reports
Volume	4
DOIs	https://doi.org/10.1038/srep06115
Publication status	Published - 19 Aug 2014

Austrian Fields of Science 2012

103025 Quantum mechanics
103019 Mathematical physics

Keywords

ALGORITHM
QUBITS

Access to Document

10.1038/srep06115Licence: CC BY-NC-ND 4.0

Cite this

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title = "A two-qubit photonic quantum processor and its application to solving systems of linear equations",

abstract = "Large-scale quantum computers will require the ability to apply long sequences of entangling gates to many qubits. In a photonic architecture, where single-qubit gates can be performed easily and precisely, the application of consecutive two-qubit entangling gates has been a significant obstacle. Here, we demonstrate a two-qubit photonic quantum processor that implements two consecutive CNOT gates on the same pair of polarisation-encoded qubits. To demonstrate the flexibility of our system, we implement various instances of the quantum algorithm for solving of systems of linear equations.",

keywords = "ALGORITHM, QUBITS",

author = "Stefanie Barz and Ivan Kassal and Martin Ringbauer and Lipp, {Yannick Ole} and Borivoje Dakic and Alan Aspuru-Guzik and Philip Walther",

note = "Funding Information: We thank Frank Verstraete for valuable discussions and Thomas Lindner for assistance in the laboratory. I.K. was supported by a UQ Postdoctoral Research Fellowship and the ARC Centres of Excellence for Engineered Quantum Systems (CE110001013) and Quantum Computation and Communication Technology (CE110001027). A.A.G. thanks the Hughes Research Laboratory (M1144-201167-DS), Air Force Research Office (FA9550-12-1-0046 and 10323836-SUB), and the Corning, Sloan and Dreyfus foundations for their support. P.W. acknowledges support from the European Commission, Q-ESSENCE (No. 248095), QUILMI (No. 295293), EQUAM (No. 323714), PICQUE (No. 608062), GRASP (No. 613024), and the ERA-Net CHISTERA project QUASAR, the John Templeton Foundation, the Vienna Center for Quantum Science and Technology (VCQ), the Austrian Nano-initiative NAP Platon, the Austrian Science Fund (FWF) through the SFB FoQuS (F4006-N16), START (Y585-N20) and the doctoral programme CoQuS, the Vienna Science and Technology Fund (WWTF, grant ICT12-041), and the United States Air Force Office of Scientific Research (FA8655-11-1-3004).",

year = "2014",

month = aug,

day = "19",

doi = "10.1038/srep06115",

language = "English",

volume = "4",

journal = "Scientific Reports",

issn = "2045-2322",

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T1 - A two-qubit photonic quantum processor and its application to solving systems of linear equations

AU - Barz, Stefanie

AU - Kassal, Ivan

AU - Ringbauer, Martin

AU - Lipp, Yannick Ole

AU - Dakic, Borivoje

AU - Aspuru-Guzik, Alan

AU - Walther, Philip

N1 - Funding Information: We thank Frank Verstraete for valuable discussions and Thomas Lindner for assistance in the laboratory. I.K. was supported by a UQ Postdoctoral Research Fellowship and the ARC Centres of Excellence for Engineered Quantum Systems (CE110001013) and Quantum Computation and Communication Technology (CE110001027). A.A.G. thanks the Hughes Research Laboratory (M1144-201167-DS), Air Force Research Office (FA9550-12-1-0046 and 10323836-SUB), and the Corning, Sloan and Dreyfus foundations for their support. P.W. acknowledges support from the European Commission, Q-ESSENCE (No. 248095), QUILMI (No. 295293), EQUAM (No. 323714), PICQUE (No. 608062), GRASP (No. 613024), and the ERA-Net CHISTERA project QUASAR, the John Templeton Foundation, the Vienna Center for Quantum Science and Technology (VCQ), the Austrian Nano-initiative NAP Platon, the Austrian Science Fund (FWF) through the SFB FoQuS (F4006-N16), START (Y585-N20) and the doctoral programme CoQuS, the Vienna Science and Technology Fund (WWTF, grant ICT12-041), and the United States Air Force Office of Scientific Research (FA8655-11-1-3004).

PY - 2014/8/19

Y1 - 2014/8/19

N2 - Large-scale quantum computers will require the ability to apply long sequences of entangling gates to many qubits. In a photonic architecture, where single-qubit gates can be performed easily and precisely, the application of consecutive two-qubit entangling gates has been a significant obstacle. Here, we demonstrate a two-qubit photonic quantum processor that implements two consecutive CNOT gates on the same pair of polarisation-encoded qubits. To demonstrate the flexibility of our system, we implement various instances of the quantum algorithm for solving of systems of linear equations.

AB - Large-scale quantum computers will require the ability to apply long sequences of entangling gates to many qubits. In a photonic architecture, where single-qubit gates can be performed easily and precisely, the application of consecutive two-qubit entangling gates has been a significant obstacle. Here, we demonstrate a two-qubit photonic quantum processor that implements two consecutive CNOT gates on the same pair of polarisation-encoded qubits. To demonstrate the flexibility of our system, we implement various instances of the quantum algorithm for solving of systems of linear equations.

KW - ALGORITHM

KW - QUBITS

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A two-qubit photonic quantum processor and its application to solving systems of linear equations

Abstract

Austrian Fields of Science 2012

Keywords

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GRASP: GRAPHENE-BASED SINGLE-PHOTON NONLINEAR OPTICAL DEVICES

EQuaM: Emulators of Quantum Frustrated Magnetism

PICQUE: Photonic Integrated Compound Quantum Encoding

Cite this

A two-qubit photonic quantum processor and its application to solving systems of linear equations

Abstract

Austrian Fields of Science 2012

Keywords

Access to Document

Other files and links

Fingerprint

Projects

GRASP: GRAPHENE-BASED SINGLE-PHOTON NONLINEAR OPTICAL DEVICES

EQuaM: Emulators of Quantum Frustrated Magnetism

PICQUE: Photonic Integrated Compound Quantum Encoding

Cite this