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Coherent quantum dynamics: What fluctuations can tell (2015)

John Schliemann

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2015-08-11

Description: Author(s): John Schliemann Coherent states provide a natural connection of quantum systems to their classical limit and are employed in various fields of physics. Here we derive general systematic expansions, with respect to quantum parameters, of expectation values of products of arbitrary operators within both oscillator co… [Phys. Rev. A 92, 022108] Published Mon Aug 10, 2015

Keywords: Fundamental concepts

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Electronic ISSN: 1094-1622

Topics: Physics

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Clauser-Horne Bell test with imperfect random inputs (2015)

Xiao Yuan, Qi Zhao, and Xiongfeng Ma

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2015-08-11

Description: Author(s): Xiao Yuan, Qi Zhao, and Xiongfeng Ma The Bell test is one of the most important tools in quantum information science. On the one hand, it enables fundamental tests of the basic physics laws of nature, and on the other hand, it can also be applied in a variety of device-independent tasks such as quantum key distribution and random numbe… [Phys. Rev. A 92, 022107] Published Mon Aug 10, 2015

Keywords: Fundamental concepts

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Algebraic metrology: Nonoptimal but pretty good states and bounds (2015)

Michael Skotiniotis, Florian Fröwis, Wolfgang Dür, and Barbara Kraus

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2015-08-11

Description: Author(s): Michael Skotiniotis, Florian Fröwis, Wolfgang Dür, and Barbara Kraus We investigate quantum metrology using a Lie algebraic approach for a class of Hamiltonians, including local and nearest-neighbor interaction Hamiltonians. Using this Lie algebraic formulation, we identify and construct highly symmetric states that admit Heisenberg scaling in precision for phase est… [Phys. Rev. A 92, 022323] Published Mon Aug 10, 2015

Keywords: Quantum information

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Relation between the Greenberger-Horne-Zeilinger–entanglement cost of preparing a multipartite pure state and its quantum discord (2015)

Seungho Yang and Hyunseok Jeong

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2015-08-11

Description: Author(s): Seungho Yang and Hyunseok Jeong We investigate how much amount of Greenberger-Horne-Zeilinger (GHZ) entanglement is required in order to prepare a given multipartite state by local operations and classical communication (LOCC). We present a LOCC procedure that asymptotically converts GHZ states into an arbitrary multipartite pure … [Phys. Rev. A 92, 022322] Published Mon Aug 10, 2015

Keywords: Quantum information

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Universal holonomic quantum gates in decoherence-free subspace on superconducting circuits (2015)

Zheng-Yuan Xue, Jian Zhou, and Z. D. Wang

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2015-08-11

Description: Author(s): Zheng-Yuan Xue, Jian Zhou, and Z. D. Wang To implement a set of universal quantum logic gates based on non-Abelian geometric phases, it is conventional wisdom that quantum systems beyond two levels are required, which is extremely difficult to fulfill for superconducting qubits and appears to be a main reason why only single-qubit gates wer… [Phys. Rev. A 92, 022320] Published Mon Aug 10, 2015

Keywords: Quantum information

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High-fidelity readout scheme for rare-earth solid-state quantum computing (2015)

A. Walther, L. Rippe, Y. Yan, J. Karlsson, D. Serrano, A. N. Nilsson, S. Bengtsson, and S. Kröll

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2015-08-11

Description: Author(s): A. Walther, L. Rippe, Y. Yan, J. Karlsson, D. Serrano, A. N. Nilsson, S. Bengtsson, and S. Kröll We propose and analyze a high-fidelity readout scheme for a single-instance approach to quantum computing in rare-earth-ion-doped crystals. The scheme is based on using different elements as qubit and readout ions, where the readout ions are doped into the material at a much lower concentration than… [Phys. Rev. A 92, 022319] Published Mon Aug 10, 2015

Keywords: Quantum information

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Spontaneous decay rate and Casimir-Polder potential of an atom near a lithographed surface (2015)

Robert Bennett

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2015-08-11

Description: Author(s): Robert Bennett Radiative corrections to an atom are calculated near a half-space that has arbitrarily shaped small depositions upon its surface. The method is based on calculation of the classical Green's function of the macroscopic Maxwell equations near an arbitrarily perturbed half-space using a Born-series exp… [Phys. Rev. A 92, 022503] Published Mon Aug 10, 2015

Keywords: Atomic and molecular structure and dynamics

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s-wave scattering lengths of the strongly dipolar bosons ^{162} Dy and ^{164} Dy (2015)

Yijun Tang, Andrew Sykes, Nathaniel Q. Burdick, John L. Bohn, and Benjamin L. Lev

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2015-08-11

Description: Author(s): Yijun Tang, Andrew Sykes, Nathaniel Q. Burdick, John L. Bohn, and Benjamin L. Lev We report the measurement of the deca-heptuplet s -partial-wave scattering length a of two bosonic isotopes of the highly magnetic element dysprosium: a = 112 ( 10 ) a 0 for Dy 162 and a = 92 ( 8 ) a 0 for Dy 164 , where a 0 is the Bohr radius. The scattering lengths are determined by the cross-dimensional relaxation … [Phys. Rev. A 92, 022703] Published Mon Aug 10, 2015

Keywords: Atomic and molecular collisions and interactions

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Real-time imaging of spin-to-orbital angular momentum hybrid remote state preparation (2015)

Manuel Erhard, Hammam Qassim, Harjaspreet Mand, Ebrahim Karimi, and Robert W. Boyd

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2015-08-11

Description: Author(s): Manuel Erhard, Hammam Qassim, Harjaspreet Mand, Ebrahim Karimi, and Robert W. Boyd There exists two prominent methods to transfer information between two spatially separated parties, namely Alice ( A ) and Bob ( B ): quantum teleportation and remote state preparation. However, the difference between these methods is, in the teleportation scheme, the state to be transferred is complete… [Phys. Rev. A 92, 022321] Published Mon Aug 10, 2015

Keywords: Quantum information

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Optimal encoding capacity of a linear optical quantum channel (2015)

J. A. Smith, D. B. Uskov, and L. Kaplan

American Physical Society (APS)

In: Physical Review A

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Publication Date: 2015-08-11

Description: Author(s): J. A. Smith, D. B. Uskov, and L. Kaplan Here, we study the classical information capacity of a quantum channel, assuming linear optical encoding, as a function of available photons and optical modes. We present a formula for general channel capacity and show that this capacity is achieved without requiring the use of entangling operations… [Phys. Rev. A 92, 022324] Published Mon Aug 10, 2015

Keywords: Quantum information

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