High performance quantum computing
... model, the basic geometric structure of the lattice allows for multi-user computation that would be problematic when utilizing the more traditional 2D cluster state techniques [14]. In traditional 2D cluster state computing, one dimension of the cluster represents “algorithmic qubits” while the othe ...
... model, the basic geometric structure of the lattice allows for multi-user computation that would be problematic when utilizing the more traditional 2D cluster state techniques [14]. In traditional 2D cluster state computing, one dimension of the cluster represents “algorithmic qubits” while the othe ...
On-chip non-reciprocal optical devices based on quantum inspired
... channel at the output during forward propagation. On the other hand, surface revival effects block any backward propagation to the input waveguide element, thus providing optical isolation. Figure 1 shows a schematic of the proposed optical isolator. It consists of waveguide array with varying width ...
... channel at the output during forward propagation. On the other hand, surface revival effects block any backward propagation to the input waveguide element, thus providing optical isolation. Figure 1 shows a schematic of the proposed optical isolator. It consists of waveguide array with varying width ...
Zhang - Department of Computer Science and Engineering, CUHK
... a quantum polynomial threshold function thr(f) = O(n1/2)? • Recall that we have O(n1/2)-time quantum algorithm for any AND-OR-NOT formula • Now (roughly): thr(f) ≤ Q(f) ≤ n1/2 • This implies that formulas are learnable in time 2√n. (Matching the known lower bound.) *1: A. Klivans, R. Servedio, STOC’ ...
... a quantum polynomial threshold function thr(f) = O(n1/2)? • Recall that we have O(n1/2)-time quantum algorithm for any AND-OR-NOT formula • Now (roughly): thr(f) ≤ Q(f) ≤ n1/2 • This implies that formulas are learnable in time 2√n. (Matching the known lower bound.) *1: A. Klivans, R. Servedio, STOC’ ...
A Brief Review on Quantum Bit Commitment
... transmitted through a channel; the channel which is the medium of transmission of the signal; the receiver which performs the inverse operation done by the transmitter in order to reconstruct the message and the destination, person or machine, to whom or which the message is intended. Due to the nee ...
... transmitted through a channel; the channel which is the medium of transmission of the signal; the receiver which performs the inverse operation done by the transmitter in order to reconstruct the message and the destination, person or machine, to whom or which the message is intended. Due to the nee ...
Quantum HPC Sweden
... “Beyond exascale” systems as we are defining them will be based on new technologies that will finally result in the much anticipated (but unknown) phase change to truly new paradigms/methodologies. The session will therefore also include presentations on architecture advances that may be enable ...
... “Beyond exascale” systems as we are defining them will be based on new technologies that will finally result in the much anticipated (but unknown) phase change to truly new paradigms/methodologies. The session will therefore also include presentations on architecture advances that may be enable ...
Terahertz quantum cascade lasers operating up to ∼ 200 K with
... considered during the optimization process. This exercise converged towards rather thin injection and extraction barriers, and we found the pairs of states across these barriers (g-u for injection and l-e for extraction) are aligned at about the same electric field. The convergence of the model towa ...
... considered during the optimization process. This exercise converged towards rather thin injection and extraction barriers, and we found the pairs of states across these barriers (g-u for injection and l-e for extraction) are aligned at about the same electric field. The convergence of the model towa ...
Quantum Computation and Algorithms
... In classical computation, we have seen NAND and NOR gate as a universal gates. A similar universality is true for quantum computation also. As described in this chapter, every classical gates can be created using unitary quantum gates. In that sense quantum circuits include all the classical circuit ...
... In classical computation, we have seen NAND and NOR gate as a universal gates. A similar universality is true for quantum computation also. As described in this chapter, every classical gates can be created using unitary quantum gates. In that sense quantum circuits include all the classical circuit ...
Observable Measure of Quantum Coherence in Finite
... efficient route to measure the amount of quantum coherence carried by the state of a system in dimension d > 2. It is customary to employ quantifiers tailored to the scenario of interest, i.e., of not general employability, expressed in terms of ad hoc entropic functions, correlators, or functions o ...
... efficient route to measure the amount of quantum coherence carried by the state of a system in dimension d > 2. It is customary to employ quantifiers tailored to the scenario of interest, i.e., of not general employability, expressed in terms of ad hoc entropic functions, correlators, or functions o ...
quantum algorithms - Computer Engineering
... Using quantum-mechanical properties of natural particles, it is possible to build computers that are different in some interesting ways than the ones that we are used to. In our usual computers, a bit is either 0 or 1 at a particular time. As a direct consequence of this, a group (register) of n bit ...
... Using quantum-mechanical properties of natural particles, it is possible to build computers that are different in some interesting ways than the ones that we are used to. In our usual computers, a bit is either 0 or 1 at a particular time. As a direct consequence of this, a group (register) of n bit ...
A Brief Survey Of Quantum Programming Languages
... the prime factors of any integer in probabilistic polynomial time [15]. There is no known classical probabilistic algorithm which can solve this problem in polynomial time. In the ten years since the publication of Shor’s result, there has been an enormous surge of research in quantum algorithms and ...
... the prime factors of any integer in probabilistic polynomial time [15]. There is no known classical probabilistic algorithm which can solve this problem in polynomial time. In the ten years since the publication of Shor’s result, there has been an enormous surge of research in quantum algorithms and ...
Closed timelike curves make quantum and classical computing
... that BQPSPACE (Bounded-Error Quantum Polynomial Space) is equal to PSPACE: that is, any problem solvable by a quantum computer with polynomial memory is also solvable by a classical computer with polynomial memory. (By contrast, quantum computers are conjectured to offer an exponential improvement o ...
... that BQPSPACE (Bounded-Error Quantum Polynomial Space) is equal to PSPACE: that is, any problem solvable by a quantum computer with polynomial memory is also solvable by a classical computer with polynomial memory. (By contrast, quantum computers are conjectured to offer an exponential improvement o ...
An exponential separation between quantum and classical one
... So have we obtained a quadratic separation between quantum and classical 1WCC? Unfortunately not yet... for every group G people have considered so far (e.g. abelian groups), there is in fact a more clever O(log |G|) bit classical protocol! The complexity of the general problem has been an open prob ...
... So have we obtained a quadratic separation between quantum and classical 1WCC? Unfortunately not yet... for every group G people have considered so far (e.g. abelian groups), there is in fact a more clever O(log |G|) bit classical protocol! The complexity of the general problem has been an open prob ...
Rewriting measurement-based quantum computations with
... Our work improves on these methods by verifying that a given pattern is deterministic—i.e. that it is free of programming errors. By working directly with the pattern we can also relax the uniformity restriction and derive correctness proofs in cases where the choice of measurement is significant. T ...
... Our work improves on these methods by verifying that a given pattern is deterministic—i.e. that it is free of programming errors. By working directly with the pattern we can also relax the uniformity restriction and derive correctness proofs in cases where the choice of measurement is significant. T ...
Quantum computation and quantum information
... computational basis states are entangled • Maybe the measurements should not be carried out in the computational basis • It is not known whether the quantum circuit model constitute an optimum quantum computer language ...
... computational basis states are entangled • Maybe the measurements should not be carried out in the computational basis • It is not known whether the quantum circuit model constitute an optimum quantum computer language ...
Full characterization of polarization states of light via direct
... To completely determine a quantum state, which is described in general by complex numbers, one must perform multiple measurements on many identical copies of the system. Quantum tomography1 is one method of quantum state determination that uses strong measurements2–6. Tomographic reconstruction enta ...
... To completely determine a quantum state, which is described in general by complex numbers, one must perform multiple measurements on many identical copies of the system. Quantum tomography1 is one method of quantum state determination that uses strong measurements2–6. Tomographic reconstruction enta ...
