#clusterstates

Nanofiber Quantum technologies NanoQT Gets $14 Million Series A Funding to Revolutionise Quantum Computing

NanoQT, a revolutionary Waseda University spinoff, has closed the first $14 million Series A investment round. With this large investment, the company's quantum computing platform, which could revolutionise computation and technology, will be developed and commercialised faster. Phoenix Venture Partners, JAFCO Group Co., Ltd., SPARX Group Co., Ltd., Keio Innovation Initiative, Inc., and Waseda University Ventures led the funding round. This diverse and large group of investors believes in NanoQT's unique methodology and its ability to solve some of the quantum business's biggest challenges. A New Quantum Computing Method NanoQT, founded by Waseda University professor Takao Aoki, is developing a room-temperature quantum computer. This differs from typical quantum devices, which require expensive and complicated cryogenic cooling systems. The cutting-edge Nanofiber Quantum Technologies platform uses distinctive quantum technology with neutral atoms and optical fibres. The “cavity QED system” at NanoQT accurately integrates laser-cooled atoms with nanofiber-based optical cavities. Quantum entanglement, a building block of quantum mechanics and strong computation, can be constructed deterministically and is scalable. NanoQT intends to create a more powerful, useful, and cost-effective platform by using qubits at ambient temperature. Professor Takao Aoki, NanoQT's founder and CEO, said, "I firmly believe that the unique technology can make a significant contribution to society by addressing the key challenges in quantum computing." The cooperation from new partners will accelerate the early realisation of a universal, large-scale fault-tolerant quantum computer. Addressing Industry Issues Scalability and error correction have long plagued quantum computing. As qubits increase system complexity and error rate, calculations become flawed. Nanofiber Quantum Technologies' platform is designed to overcome these challenges. The startup uses cluster states, highly entangled quantum states, to build a universal, measurement-based quantum computer. This method is ideal for large-scale integration and fault-tolerant structures, which repair errors and perform accurate calculations. Nanofiber Quantum Technologies is also building the first distributed quantum computer with parallel computing, the "Quantum Data Centre." Through optical fibre networks, numerous small-to-medium quantum processors can work together to tackle difficult problems. This networked, modular approach to commercial quantum computing is feasible and scalable. Future Vision and Investor Confidence Top venture capital firms' strategic investment in NanoQT shows its potential. Phoenix Venture Partners General Partner Dr. John T. Chen said, “NanoQT’s innovative approach of utilising optical fibre to link atoms at room temperature presents a groundbreaking path to scalability.” Tomotake Kitazawa of JAFCO Group said the platform is “eminently suitable for distributed quantum computing and building a quantum internet.” Social implementation is fascinating. NanoQT will focus on three areas with this new funding: Researching and developing quantum computing units faster.

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Quantum Computing Cluster States Definition

Cluster states are extremely entangled states with several qubits. Entanglement happens when numerous qubits' states are so intertwined that they cannot be stated separately, even when far apart. Cluster states, unlike Greenberger-Horne-Zeilinger or W states, are harder to break by measurements, making them durable versions.

These states are formed by qubit lattices with certain interactions. Cluster states are also known as "graph states," where a graph represents the qubits and their entanglement. This picture shows qubits as dots (or nodes) and entanglement links as lines between points. Cluster states feature an underlying graph that is a connected section of a basic, repeating lattice like a grid.

The properties of a cluster state are determined by “correlation operators.” These operators explain the lattice relationships between qubits and closest neighbours. When all correlation operations are done to the same quantum state, only the cluster state stays the same (up to a sign).

Cluster States and One-Way Quantum Computing

One-way quantum computers, also known as measurement-based quantum computing (MBQC), use cluster states for quantum computation. The quantum computation process is transformed by this idea.

The more traditional “circuit-based” paradigm processes information by applying quantum logic gates one at a time to qubits in a fundamental starting state. One-way models divide the procedure into two phases:

Resource Creation: Create a large, highly entangled cluster state initially. This is the most complicated step, where multi-qubit interactions are built up before computing. This state is the universal substrate for quantum computing.

Measurement-based computation: Next, each qubit in the cluster state is measured in stages. How each qubit is measured determines which quantum logic gate is simulated. The result of the preceding measurement influences the next qubit measurement.

This approach is called “one-way” because the measurements irrevocably consume cluster state entanglement. As the computation continues, the beginning resource depletes, driving the computation to the latest measurements to determine the final result.

Cluster State Creation and Verification

Cluster states have been realised in many physical systems, but experimental quantum physics struggles to create and prove them.

Create Experimentally

One of the most common cluster state generation methods encodes the quantum states ‘0’ and ‘1’ into photon polarisation (horizontal for ‘0’ and vertical for ‘1’). Scientists use spontaneous parametric down-conversion to routinely synthesise entangled photon pairs. Combining fundamental two-qubit entangled pairs, which are basic cluster states, with optical instruments like beam splitters creates larger and more complicated cluster states.

Cold atoms were also employed to produce optical lattice cluster states. Experimentally achieving a 3D cluster state opens the way to quantum computers with quantum error correction.

Verification and Entanglement Standards

Verifying that the created state is the intended entangled cluster state is crucial after an experiment. This can be done by measuring its fidelity, which measures how closely the experimentally created state matches the ideal, perfect cluster state. State with real multi-particle entanglement has been shown to exist with fidelity over 50%.