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Papers by Lee Liu
Bulletin of the American Physical Society, 2019
CLEO: 2014, 2014
ABSTRACT We present an experimental demonstration of an optical switch operating in the quantum r... more ABSTRACT We present an experimental demonstration of an optical switch operating in the quantum regime, consisting of a single trapped atom near a nanoscale photonic crystal cavity. Article not available.
Frontiers in Optics 2014, 2014
In analogy to transistors in classical electronic circuits, a quantum optical switch is an import... more In analogy to transistors in classical electronic circuits, a quantum optical switch is an important element of quantum circuits and quantum networks [1][2]. Operated at the fundamental limit where a single quantum of light or matter controls another field or material system[4], it may enable fascinating applications such as long-distance quantum communication , distributed quantum information processing[2] and metrology , and the exploration of novel quantum states of matter . Here, by strongly coupling a photon to a single atom trapped in the near field of a nanoscale photonic crystal cavity, we realize a system where a single atom switches the phase of a photon, and a single photon modifies the atom's phase. We experimentally demonstrate an atom-induced optical phase shift[8] that is nonlinear at the two-photon level[9], a photon number router that separates individual photons and photon pairs into different output modes[10], and a single-photon switch where a single "gate" photon controls the propagation of a subsequent probe field 12]. These techniques pave the way towards integrated quantum nanophotonic networks involving multiple atomic nodes connected by guided light.
Bulletin of the American Physical Society, 2019
CLEO: 2014, 2014
ABSTRACT We present an experimental demonstration of an optical switch operating in the quantum r... more ABSTRACT We present an experimental demonstration of an optical switch operating in the quantum regime, consisting of a single trapped atom near a nanoscale photonic crystal cavity. Article not available.
Frontiers in Optics 2014, 2014
In analogy to transistors in classical electronic circuits, a quantum optical switch is an import... more In analogy to transistors in classical electronic circuits, a quantum optical switch is an important element of quantum circuits and quantum networks [1][2]. Operated at the fundamental limit where a single quantum of light or matter controls another field or material system[4], it may enable fascinating applications such as long-distance quantum communication , distributed quantum information processing[2] and metrology , and the exploration of novel quantum states of matter . Here, by strongly coupling a photon to a single atom trapped in the near field of a nanoscale photonic crystal cavity, we realize a system where a single atom switches the phase of a photon, and a single photon modifies the atom's phase. We experimentally demonstrate an atom-induced optical phase shift[8] that is nonlinear at the two-photon level[9], a photon number router that separates individual photons and photon pairs into different output modes[10], and a single-photon switch where a single "gate" photon controls the propagation of a subsequent probe field 12]. These techniques pave the way towards integrated quantum nanophotonic networks involving multiple atomic nodes connected by guided light.