title: Reference-frame-independent quantum-key-distribution server with a telecom tether for an on-chip client.
abstract: We demonstrate a client-server quantum key distribution (QKD) scheme. Large resources such as laser and detectors are situated at the server side, which is accessible via telecom fiber to a client requiring only an on-chip polarization rotator, which may be integrated into a handheld device. The detrimental effects of unstable fiber birefringence are overcome by employing the reference-frame-independent QKD protocol for polarization qubits in polarization maintaining fiber, where standard QKD protocols fail, as we show for comparison. This opens the way for quantum enhanced secure communications between companies and members of the general public equipped with handheld mobile devices, via telecom-fiber tethering.
authors.affiliation: Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1UB, United Kingdom and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and Department of Applied Physics, Xi'an Jiaotong University, Xi'an 710049, China.
authors.forename: P
authors.initials: P
authors.lastname: Zhang
authors.affiliation: Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1UB, United Kingdom.
authors.forename: K
authors.initials: K
authors.lastname: Aungskunsiri
authors.affiliation: Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1UB, United Kingdom.
authors.forename: E
authors.initials: E
authors.lastname: Martín-López
authors.affiliation: Nokia Research Center, Broers Building, 21 J.J. Thomson Avenue, Cambridge CB3 0FA, United Kingdom.
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authors.initials: J
authors.lastname: Wabnig
authors.affiliation: Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1UB, United Kingdom and Centre for Quantum Dynamics and Queensland Micro and Nanotechnology Centre, Griffith University, Brisbane, Queensland 4111, Australia.
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authors.lastname: Lobino
authors.affiliation: Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1UB, United Kingdom.
authors.forename: R W
authors.initials: RW
authors.lastname: Nock
authors.affiliation: Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1UB, United Kingdom and Bristol Centre for Functional Nanomaterials, Centre for NSQI, University of Bristol, Bristol BS8 1FD, United Kingdom.
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authors.lastname: Munns
authors.affiliation: Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1UB, United Kingdom.
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authors.initials: D
authors.lastname: Bonneau
authors.affiliation: Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1UB, United Kingdom.
authors.forename: P
authors.initials: P
authors.lastname: Jiang
authors.affiliation: Nokia Research Center, Broers Building, 21 J.J. Thomson Avenue, Cambridge CB3 0FA, United Kingdom.
authors.forename: H W
authors.initials: HW
authors.lastname: Li
authors.affiliation: Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1UB, United Kingdom.
authors.forename: A
authors.initials: A
authors.lastname: Laing
authors.affiliation: Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1UB, United Kingdom.
authors.forename: J G
authors.initials: JG
authors.lastname: Rarity
authors.affiliation: Nokia Research Center, Broers Building, 21 J.J. Thomson Avenue, Cambridge CB3 0FA, United Kingdom.
authors.forename: A O
authors.initials: AO
authors.lastname: Niskanen
authors.affiliation: Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1UB, United Kingdom.
authors.forename: M G
authors.initials: MG
authors.lastname: Thompson
authors.affiliation: Centre for Quantum Photonics, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol BS8 1UB, United Kingdom.
authors.forename: J L
authors.initials: JL
authors.lastname: O'Brien