It’s a Good Time for Time-Bin Qubits

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Physics.6.110.pdf (608.93 KB)

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https://physics.aps.org/articles/v6/110

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10.1103/Physics.6.110
 http://hdl.handle.net/11603/19318

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UMBC Physics Department
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UMBC Joint Center for Earth Systems Technology (JCET)

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2013-10-09

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articles
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Todd Pittman, It’s a Good Time for Time-Bin Qubits, Physics 6, 110 (2013), DOI: 10.1103/Physics.6.110

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© 2013 American Physical Society

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Abstract

n contrast to classical bits of information that are either 0 or 1, quantum bits—or “qubits”—can be in superposition states of 0 and 1. Just like classical bits, however, qubits are physical objects that have to be implemented in real physical systems. Researchers have used single photons as physical qubits, with the quantum information encoded in terms of polarization, angular momentum, and many other degrees of freedom. The time-bin degree of freedom (that is, encoding quantum information in terms of relative arrival times of light pulses) offers a particularly robust kind of single-photon qubits, and two recent papers have advanced the use of time-bin qubits in dramatic ways.