Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Diagonal quantum discord
Zi-Wen Liu, Ryuji Takagi, S. Lloyd·Aug 30, 2017
Quantum discord measures quantum correlation by comparing the quantum mutual information with the maximal amount of mutual information accessible to a quantum measurement. This paper analyzes the properties of diagonal discord, a simplified version o...
Tensor Network Contractions
Shi-Ju Ran, E. Tirrito, C. Peng +4 more·Aug 30, 2017
Tensor network (TN), a young mathematical tool of high vitality and great potential, has been undergoing extremely rapid developments in the last two decades, gaining tremendous success in condensed matter physics, atomic physics, quantum information...
Routing entanglement in the quantum internet
M. Pant, H. Krovi, D. Towsley +5 more·Aug 23, 2017
Remote quantum entanglement can enable numerous applications including distributed quantum computation, secure communication, and precision sensing. We consider how a quantum network—nodes equipped with limited quantum processing capabilities connect...
Implementation of Multiparty quantum clock synchronization
X. Kong, T. Xin, Shijie Wei +4 more·Aug 21, 2017
The quantum clock synchronization (QCS) is to measure the time difference among the spatially separated clocks with the principle of quantum mechanics. The first QCS algorithm proposed by Chuang and Jozsa is merely based on two parties, which is furt...
Parity-Engineered Light-Matter Interaction.
J. Goetz, F. Deppe, K. Fedorov +6 more·Aug 21, 2017
The concept of parity describes the inversion symmetry of a system and is of fundamental relevance in the standard model, quantum information processing, and field theory. In quantum electrodynamics, parity is conserved and large field gradients are ...
Twisted photons: new quantum perspectives in high dimensions
Manuel Erhard, R. Fickler, Mario Krenn +1 more·Aug 21, 2017
Twisted photons can be used as alphabets to encode information beyond one bit per single photon. This ability offers great potential for quantum information tasks, as well as for the investigation of fundamental questions. In this review article, we ...
Interference Effects in a Tunable Quantum Point Contact Integrated with an Electronic Cavity
C. Yan, Sanjeev Kumar, M. Pepper +5 more·Aug 17, 2017
We show experimentally how quantum interference can be produced using an integrated quantum system comprising an arch-shaped short quantum wire (or quantum point contact, QPC) of 1D electrons and a reflector forming an electronic cavity. On tuning th...
Analysis of quantum information processors using quantum metrology
Mark J. Kandula, P. Kok·Aug 13, 2017
Physical implementations of quantum information processing devices are generally not unique, and we are faced with the problem of choosing the best implementation. Here, we consider the sensitivity of quantum devices to variations in their different ...
Coherence properties of the 0-π qubit
Peter Groszkowski, A. Paolo, A. Grimsmo +5 more·Aug 9, 2017
Superconducting circuits rank among some of the most interesting architectures for the implementation of quantum information processing devices. The recently proposed 0-π qubit (Brooks et al 2013 Phys. Rev. A 87 52306) promises increased protection f...
Quantum Metrology beyond the Classical Limit under the Effect of Dephasing.
Y. Matsuzaki, S. Benjamin, S. Nakayama +2 more·Aug 4, 2017
Quantum sensors have the potential to outperform their classical counterparts. For classical sensing, the uncertainty of the estimation of the target fields scales inversely with the square root of the measurement time T. On the other hand, by using ...
The upside of noise: engineered dissipation as a resource in superconducting circuits
E. Kapit·Aug 2, 2017
Historically, noise in superconducting circuits has been considered an obstacle to be removed. A large fraction of the research effort in designing superconducting circuits has focused on noise reduction, with great success, as coherence times have i...
Performance of five-qubit code for arbitrary error channels
Long Huang, Xiaohua Wu, T. Zhou·Jul 31, 2017
In quantum error correction, it is an important assumption that errors on different qubits are independent. In our previous work [Phys. Rev. A {\bf 92}, 052320 (2015)], the generality of the concatenated five-qubit code has been investgated when nois...
Demonstration of the no-hiding theorem on the 5-Qubit IBM quantum computer in a category-theoretic framework
Amolak Ratan Kalra, Navya Gupta, B. K. Behera +2 more·Jul 29, 2017
The quantum no-hiding theorem, first proposed by Braunstein and Pati (Phys Rev Lett 98:080502, 2007), was verified experimentally by Samal et al. (Phys Rev Lett 186:080401, 2011) using NMR quantum processor. Till then, this fundamental test has not b...
Rewiring stabilizer codes
K. Colladay, E. Mueller·Jul 28, 2017
We present an algorithm for manipulating quantum information via a sequence of projective measurements. We frame this manipulation in the language of stabilizer codes: a quantum computation approach in which errors are prevented and corrected in part...
Quantum error correction using weak measurements
Parveen Kumar, Apoorva D. Patel·Jul 27, 2017
The standard quantum error correction protocols use projective measurements to extract the error syndromes from the encoded states. We consider the more general scenario of weak measurements, where only partial information about the error syndrome ca...
Experimental demonstration of selective quantum process tomography on an NMR quantum information processor
Akshay Gaikwad, Diksha Rehal, Amandeep Singh +2 more·Jul 21, 2017
We present the NMR implementation of a scheme for selective and efficient quantum process tomography without ancilla. We generalize this scheme such that it can be implemented efficiently using only a set of measurements involving product operators. ...
Self-guided method to search maximal Bell violations for unknown quantum states
Li-Kai Yang, Geng Chen, Wen-Hao Zhang +4 more·Jul 18, 2017
In recent decades, a great variety of research and applications concerning Bell nonlocality have been developed with the advent of quantum information science. Providing that Bell nonlocality can be revealed by the violation of a family of Bell inequ...
Complete Bell-state analysis for superconducting-quantum-interference-device qubits with a transitionless tracking algorithm
Yi‐Hao Kang, Ye‐Hong Chen, Zhicheng Shi +3 more·Jul 13, 2017
In this paper, we propose a protocol for complete Bell-state analysis for two superconducting-quantum-interference-device qubits. The Bell-state analysis could be completed by using a sequence of microwave pulses designed by the transition- less trac...
Quantum critical environment assisted quantum magnetometer
Noufal Jaseem, S. Omkar, Anil Shaji·Jul 12, 2017
A central qubit coupled to an Ising ring of N qubits, operating close to a critical point is investigated as a potential precision quantum magnetometer for estimating an applied transverse magnetic field. We compute the quantum Fisher information for...
High-dimensional frequency-bin entangled photons in an optical microresonator on a chip
Poolad Imany, J. Jaramillo-Villegas, Ogaga D. Odele +6 more·Jul 7, 2017
Quantum frequency combs from chip-scale integrated sources are promising candidates for scalable and robust quantum information processing (QIP). However, to use these quantum combs for frequency domain QIP, demonstration of entanglement in the frequ...