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A scheme for quantum teleportation between discrete and continuous encodings of an optical qubit | | Alexander E. Ulanov
; Demid Sychev
; Anastasia A. Pushkina
; Ilya A. Fedorov
; A. I. Lvovsky
; | | Date: |
27 May 2016 | | Abstract: | Transfer of quantum information between physical systems of a different
nature is a central matter in quantum technologies. Particularly challenging is
the transfer between discrete- and continuous degrees of freedom of various
harmonic oscillator systems. Here we implement a protocol for teleporting a
continuous-variable optical qubit, encoded by means of coherent states, onto a
discrete-variable, single-rail qubit - a superposition of the vacuum- and
single-photon optical states - via a hybrid entangled resource. We test our
protocol on coherent states of different phases and obtain the teleported qubit
with a fidelity of $0.83pm0.04$. We also find that the phase of the resulting
qubit varies consistently with that of the input, having a standard deviation
of $3.8^circ$ from the target value. Our work opens up the way to wide
application of quantum information processing techniques where discrete- and
continuous-variable encodings are combined within the same optical circuit. | | Source: | arXiv, 1605.8649 | | Services: | Forum | Review | PDF | Favorites | |
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