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Reply to Comment “State-independent experimental test of quantum contextuality in an indivisible system
Comment “State-independent experimental quantum contextuality indivisible system
2016/1/23
Reply to Comment “State-independent experimental test of quantum contextuality in an indivisible system.
Quantum Logic between Remote Quantum Registers
Quantum Logic between Remote Quantum Registers
2016/1/23
Weconsidertwoapproachestodark-spin-mediatedquantumcomputinginhybridsolid-statespinarchitectures.First,wereviewthenotionofeigenmode-mediatedunpolarizedspin-chainstatetransferandextendtheanalysisto vari...
Large quantum superpositions of a levitated nanodiamond through spin-optomechanical coupling
Large quantum superpositions levitated nanodiamond spin-optomechanical coupling
2016/1/23
We propose a method to generate and detect large quantum superposition states and arbitrary Fock states for the oscillational mode of an optically levitated nanocrystal diamond. The nonlinear interact...
Source attack of decoy-state quantum key distribution using phase information
Source attack decoy-state quantum key distribution phase information
2016/1/23
Quantum key distribution (QKD) utilizes the laws of quantum mechanics to achieve information-theoretically secure key generation. This field is now approaching the stage of commercialization, but many...
Postprocessing for quantum random-number generators: Entropy evaluation and randomness extraction
Postprocessing quantum random-number generator Entropy evaluation randomness extraction
2016/1/23
Quantum random-number generators (QRNGs) can offer a means to generate information-theoretically provable random numbers, in principle. In practice, unfortunately, the quantum randomness is inevitably...
Experimental measurement-device-independent quantum key distribution
measurement-device-independent quantum key distribution
2016/1/23
Quantum key distribution is proven to offer unconditional security in communication between two remote users with ideal source and detection. Unfortunately, ideal devices never exist in practice and d...
Local characterization of one-dimensional topologically ordered states
Local characterization one-dimensional topologically ordered states
2016/1/23
We consider one-dimensional Hamiltonian systems whose ground states display symmetry-protected topological order. We show that ground states within the topological phase cannot be connected with each ...
Experimental distillation of quantum nonlocality
Experimental distillation uantum nonlocality
2016/1/23
We report the first experimental demonstration of distillation of quantum nonlocality, confirming the recent theoretical protocol [Phys. Rev. Lett. 102, 120401 (2009)]. Quantum nonlocality is describe...
Quantum computations without definite causal structure
Quantum computations definite causal structure
2016/1/23
Weshowthatquantumtheoryallows fortransformationsofblackboxesthatcannotberealizedbyinsertingthe input black boxes within a circuit in a predefined causal order. The simplest example of such a transform...
Optimal design and quantum benchmarks for coherent state amplifiers
Optimal design quantum benchmarks coherent state amplifiers
2016/1/23
We establish the ultimate quantum limits to the amplification of an unknown coherent state, both in the deterministic and probabilistic case, investigating the realistic scenario where the expected ph...
Quantum limited measurement of magnetic field gradient with entangled atoms
Quantum limited measurement magnetic field gradient entangled atoms
2016/1/23
We propose a method to detect the amplitude gradient of a microwave field by using a pair of entangled two-component Bose-Einstein condensates. We consider the two spatially separated condensates to b...
No process in nature can perfectly clone an arbitrary quantum state. But is it possible to engineer processes that replicate quantum information with vanishingly small error? Here we demonstrate the p...
Measurement-device-independent Quantum Key Distribution with Uncharacterized Qubit Sources
Measurement-device-independent Quantum Key Distribution Uncharacterized Qubit Sources
2016/1/23
Measurement-device-independent quantum key distribution (MDIQKD) is proposed to be secure against any possible detection attacks. The security of the original proposal relies on the assumption that th...
Entanglement-based quantum key distribution with biased basis choice via free space
Entanglement-based quantum key distribution iased basis choice via free space
2016/1/23
We report a free-space entanglement-based quantum key dis-tribution experiment, implementing the biased basis protocol between two sites which are 15.3 km apart. Photon pairs from a polarization-entan...
Room Temperature Ultra-sensitive Mass Spectrometer via Dynamic Decoupling
Room Temperature Ultra-sensitive Mass Spectrometer Dynamic Decoupling
2016/1/22
We propose an ultrasensitive mass spectrometer based on a coupled quantum-bit-oscillator system. Under dynamical decoupling control of the quantum bit (qubit), the qubit coherence exhibits a comb stru...