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Research reveals exotic quantum states in double-layer graphene（图）
exotic quantum states double-layer graphene
2019/10/23
NSF-funded research by scientists at Brown and Columbia Universities has demonstrated the existence of previously unknown states of matter that arise in double-layer stacks of graphene, a two-dimensio...
Secure Certification of Mixed Quantum States with Application to Two-Party Randomness Generation
quantum cryptography Mixed Quantum States
2018/11/8
We investigate sampling procedures that certify that an arbitrary quantum state on nn subsystems is close to an ideal mixed state φ⊗nφ⊗n for a given reference state φφ, up to errors on a f...
We propose the concept of pseudorandom quantum states, which appear random to any quantum polynomial-time adversary. This offers a computational approximation to perfect randomness on quantum states (...
Distinct Quantum States Cannot Be Compatible with a Single State of Reality
quantum state wave function projective measurement protective measurement physical state ontic state psi-epistemic model
2016/6/13
Recently Lewis et al. [Phys. Rev. Lett. 109, 150404 (2012)] demonstrated that additional assumptions such as preparation independence are always necessary to rule out a psi-epistemic model, in which t...
In defence of non-ontic accounts of quantum states
quantum states quantum probabilities anthropocentric notions micro/macro divide explanation and prediction
2016/6/13
The paper discusses objections against non-hidden variable versions of the epistemic conception of quantum states — the view that quantum states do not describe the properties of quantum systems but r...
Comment on "Distinct Quantum States Can Be Compatible with a Single State of Reality"
psi-epistemic model quantum state wave function protective measurement
2016/5/30
Lewis et al. recently demonstrated that additional assumptions such as preparation independence are always necessary to rule out a psi-epistemic model, in which the quantum state is not uniquely deter...
Interpreting Heisenberg interpreting quantum states
Werner Heisenberg quantum theory interpretation quantum probabilities
2016/5/30
The paper investigates possible readings of the later Heisenberg's remarks on the nature of quantum states. It discusses, in particular, whether Heisenberg should be seen as a proponent of the epistem...
Asymptotically Optimal Discrimination between Pure Quantum States
multiple quantum state discrimination generalized quantum Chernoff distance quantum hypothesis testing error exponents
2015/8/25
We consider the decision problem between a finite numberof states of a finite quantum system, when an arbitrarily large number of copies of the system is available for measurements. We provide an uppe...
Under so-called primitive ontology approaches, in fully describing the history of a quantum system, one thereby attributes interesting properties to regions of spacetime. Primitive ontology approaches...
Comment on "Semiquantum-key distribution using less than four quantum states"
Semiquantum-key distribution quantum states
2010/11/4
Comment on "Semiquantum-key distribution using less than four quantum states".
Discrete basis of localized quantum states for the free particle
Discrete basis localized quantum states free particle
2010/11/8
An infinite discrete series of solutions of the free Schr\"odinger equation in one dimension is constructed. These solutions are normalizable, expand the whole space of solutions, are spatially multi-...
Reply to "Comment on 'Semiquantum-key distribution using less than four quantum states' "
Comment on Semiquantum-key distribution quantum states
2010/11/8
Recently Boyer and Mor pointed out the first conclusion of Lemma 1 in our original paper is not correct, and therefore, the proof of Theorem 5 based on Lemma 1 is wrong. Furthermore, they gave a direc...
Deciding Unitary Equivalence Between Matrix Polynomials and Sets of Bipartite Quantum States
Deciding Unitary Equivalence Matrix Polynomials Sets of Bipartite Quantum States
2010/10/29
In this brief report, we consider the equivalence between two sets of $m+1$ bipartite quantum states under local unitary transformations. For pure states, this problem corresponds to the matrix algebr...
Prefect Transfer of Quantum States on Spin Chain with Dzyaloshinskii- Moriya interaction in inhomogeneous Magnetic field
XY Spin-Chain Teleportation Dzyaloshinskii-Moriya interaction
2010/10/29
In this work, we use the Hamiltonian of a modified Dzyaloshinskii-Moriya model and investigate the perfect transfer of the quantum state on the spin networks. In this paper, we calculate fidelity in w...
High efficiency tomographic reconstruction of quantum states by quantum nondemolition measurements
High efficiency tomographic reconstruction of quantum states quantum nondemolition measurements
2010/10/20
We propose a high efficiency tomographic scheme to reconstruct an unknown quantum state of the qubits by using a series of quantum nondemolition (QND) measurements. The proposed QND measurements of th...