Experimental demonstration of optimal universal asymmetric quantum cloning of polarization states of single photons by partial symmetrization

Journal Article · Tue Dec 15 00:00:00 EST 2009 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.80.062306· OSTI ID:21352306

Cernoch, Antonin; Soubusta, Jan ^[1]; Celechovska, Lucie; Dusek, Miloslav; Fiurasek, Jaromir ^[2]

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1. Joint Laboratory of Optics of Palacky University and Institute of Physics of Academy of Sciences of the Czech Republic, 17. listopadu 50A, 779 07 Olomouc (Czech Republic)
2. Department of Optics, Palacky University, 17. listopadu 12, 779 00 Olomouc (Czech Republic)

We report on experimental implementation of the optimal universal asymmetric 1->2 quantum cloning machine for qubits encoded into polarization states of single photons. Our linear-optical machine performs asymmetric cloning by partially symmetrizing the input polarization state of signal photon and a blank copy idler photon prepared in a maximally mixed state. We show that the employed method of measurement of mean clone fidelities exhibits strong resilience to imperfect calibration of the relative efficiencies of single-photon detectors used in the experiment. Reliable characterization of the quantum cloner is thus possible even when precise detector calibration is difficult to achieve.

• OSTI ID: 21352306
• Journal Information: Physical Review. A, Vol. 80, Issue 6; Other Information: DOI: 10.1103/PhysRevA.80.062306; (c) 2009 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ASYMMETRY
CALIBRATION
CLONING
EFFICIENCY
MIXED STATE
PHOTODETECTORS
PHOTONS
POLARIZATION
QUANTUM COMPUTERS
QUBITS
SIGNALS
VISIBLE RADIATION
BOSONS
COMPUTERS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
INFORMATION
MASSLESS PARTICLES
QUANTUM INFORMATION
RADIATIONS