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Quantum Metrology with Dicke Squeezed States
quantum metrology Dicke squeezed state entanglement
2016/1/22
We introduce a new class of quantum many-particle entangled states, called the Dicke squeezed (or DS) states, which can be used to improve the precision in quantum metrology beyond the standard quantu...
Certifying Quantumness: Benchmarks for the Optimal Processing of Generalized Coherent and Squeezed States[J]
Certifying Quantumness Benchmarks Optimal Processing Generalized Coherent Squeezed States[J]
2016/1/22
Quantumtechnologypromisesrevolutionaryadvantagesininformationprocessingandtransmissioncompared to classical technology; however, determining which specific resources are needed to surpass the capabili...
On the Fermi Function of Squeezed Coherent States
Fermi Function Squeezed Coherent States Quantum Physics
2011/10/9
Abstract: Fermi observed in 1930 that the state of a quantum system may be defined in two different (but equivalent) ways, namely by its wavefunction $\Psi$ or by a certain function $g_F$ on phase spa...
Geometric phase for nonlinear coherent and squeezed state
geometric phase nonlinear coherent squeezed state
2010/11/8
The non-unitary and non-cyclic geometric phase for two nonlinear coherent and one squeezed tates are formulated. Moreover, the nonlinear results are reduced to geometric phases of standard oherent and...
Entanglement dynamics of bipartite system in squeezed vacuum reservoirs
squeezed vacuum reservoirs bipartite system Quantum Physics
2010/11/8
Entanglement plays a crucial role in quantum information protocols, thus the dynamical behavior of entangled states is of a great importance. In this paper we suggest a useful scheme that permits a di...
Dynamical generation of phase-squeezed states in a two-component Bose-Einstein condensates
Dynamical generation of phase-squeezed states two-component Bose-Einstein condensates
2010/11/22
As an “input” state of a linear (Mach-Zehnder or Ramsey) interferometer, the phase-squeezed
state proposed by Berry and Wiseman exhibits the best sensitivity approaching to the Heisenberg
limit [Phy...
Reduction of quantum noise in optical interferometers using squeezed light
Reduction quantum noise optical interferometers squeezed light
2010/11/8
We study the photon counting noise in optical interferometers used for gravitational wave detection. In order to reduce quantum noise a squeezed vacuum state is injected into the usually unused input ...
We propose a scheme for unambiguous state comparison (USC) of two unknown squeezed vacuum states of an electromagnetic field. Our setup is based on linear optical elements and photon-number detectors,...
New 3-mode squeezing operator and squeezed vacuum state in 3-wave mixing
New 3-mode squeezing operator squeezed vacuum state 3-wave mixing
2010/10/19
In a 3-wave mixing process occurring in some nonlinear optical medium when a† 1mode interacts
with both a† 2mode and a† 3mode, we theoretically study the squeezing effect generated ...
Squeezed vacuum reservoir effect for entanglement decay in nonlinear quantum scissors system
entanglement dynamics Kerr coupler squeezed vacuum reservoir
2010/10/18
We discuss the coupler system of two nonlinear oscillators excited by an external coherent field prepared in a maximally entangled state (Bell-like state). We show that as a result of the coupler inte...
Engineering two-mode squeezed states of cold atomic clouds with a superconducting stripline resonator
Two-mode squeezed state circuit QED cold atoms
2010/10/20
A scheme is proposed for engineering two-mode squeezed states of two separated cold atomic clouds positioned near the surface of a superconducting stripline resonator.Based on the coherent magnetic co...
Spin-squeezed atoms boost interferometry（图）
Spin-squeezed atoms interferometry atomic clocks
2010/4/15
Physicists in Germany are the first to use "spin-squeezed" atoms to boost the precision of an interferometer based on interacting atoms. Their work involves entangling several hundred atoms in a way t...
Quantum Information Experiments with Squeezed Light
Squeezing Entanglement Quantum communication
2009/6/12
Nonlocal correlation of an entangled state enables one to perform quantum communication. Continuous variable bipartite entangled state, or Einstein-Podolsky-Rosen state, has been employed to demonstra...
Generation of 1.5 µm Squeezed Vacuum Pulse Using a Sagnac Loop Interferometer
Squeezed state Ultrafast nonlinear optics
2009/6/1
Photon-number squeezing and quadrature squeezing were studied using ultrafast fibre nonlinear optics pumped by 1.5 µm femtosecond laser pulses. To obtain quadrature squeezing using an Erbium dop...
Demonstration of Quadrature Squeezed Surface-Plasmons in a Gold Waveguide
Quadrature Squeezed Surface-Plasmons Gold Waveguide
2010/4/9
We report on the efficient generation, propagation, and re-emission of squeezed long-range surface-plasmon polaritons (SPPs) in a gold waveguide. Squeezed light is used to excite the non-classical SPP...