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Despite the great success of quantum mechanics, questions regarding its application still exist and the boundary between quantum and classical mechanics remains unclear. Based on the philosophical assumptions of macrorealism and noninvasive measurability, Leggett and Garg devised a series of inequalities (LG inequalities) involving a single system with a… (More)

- Xubo Zou, K Pahlke, W Mathis
- 2002

We present a scheme to produce an entangled four-photon W-state by using linear optical elements. The symmetrical setup of linear optical elements consists of four beam splitters, four polarization beam splitters and four mirrors. A photon EPR-pair and two single photons are required as the input modes. The projection on the W-state can be made by a… (More)

We show that the combination of spin-orbit coupling and in-plane Zeeman field in a two-dimensional degenerate Fermi gas can lead to a larger parameter region for Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phases than that using spin-imbalanced Fermi gases. The resulting FFLO superfluids are also more stable due to the enhanced energy difference between FFLO… (More)

- Xubo Zou, K Pahlke, W Mathis
- 2008

We present a scheme to generate the polarization-entangled two-photon state 1 √ 2 (|H|V + |V |H), which is of much interest in the field of quantum information processing. Furthermore we demonstrate the capability of this concept in respect of a generalization to entangle N-photon states for interferometry and lithography. This scheme requires single-photon… (More)

- Xubo Zou, K Pahlke, W Mathis
- 2008

We present an scheme to generate entangled state between two traveling modes for fixed number of photon, which is based on beam splitter transformation and conditional zero photon counters. It has long realized that the striking nature of entanglement lies at the heart of study of the fundamental issues in quantum mechanics as witnessed by… (More)

- Xubo Zou, K Pahlke, W Mathis
- 2001

We present a feasible scheme to implement the non-deterministic quantum logic operation of Knill, Laflamme and Milburn (Nature, 409, 46-52(2001)) by using a teleportation protocol, which requires only single-photon sources, linear optical elements and photon detectors. An approach to quantum teleportation on the basis of optical elements makes the transport… (More)

We show that measurement can recover the quantum coherence of a qubit in a non-Markovian environment. The experimental demonstration in an optical system is provided by comparing the visibilities (and fidelities) of the final states with and without measurement. This method can be extended to other two-level quantum systems and entangled states in a… (More)

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