As a novel paradigm in quantum communication, secure direct communication (QSDC) enables secure, reliable, and deterministic information transmission, leveraging the principles of mechanics. One-photon-interference QSDC is particularly attractive because it mitigates vulnerabilities measurement devices while extending transmission distances. In this paper, we propose high-dimensional one-photon-interference protocol that exploits advantages encoding phase weak coherent pluses to further...

Quantum secure direct communication (QSDC) is a quantum paradigm that transmits confidential messages directly using states. Measurement-device-independent (MDI) QSDC protocols can eliminate the security loopholes associated with measurement devices. To enhance practicality and performance of MDI-QSDC protocols, we propose one-photon-interference MDI (OPI-QSDC) protocol which transcends need for memory, ideal single-photon sources, or entangled light sources. The our OPI-QSDC has also been...

Quantum communication and quantum metrology are widely compelling applications in the field of information science, remote sensing is an intersection both. Despite their differences, there notable commonalities between sensing, as they achieve functionalities through transmission states. Here we propose a integrated (QISAC) protocol, which achieves under Heisenberg limit while simultaneously enabling secure entanglements. We have theoretically proven its security against eavesdroppers. The...

Abstract We propose a scheme where one can exploit auxiliary resources to achieve quantum multicast communication with network coding over the butterfly network. In this paper, we 2-pair scheme, and extend it k -pair extended Firstly, an EPR pair is shared between each adjacent node on network, make use of local operation classical generate entangled relationship non-adjacent nodes. Secondly, sender adds particles according number , in which CNOT operations are applied form multi-particle...

Abstract The high-dimensional quantum system greatly improve the channel capacity and information storage space, achieve transmission, which enhance speed of computing processing. In this paper, a teleportation protocol without loss is proposed. We consider pre-sharing non-maximum entangled state as between sender receiver. By adding auxiliary particle performing local operations, it possible to loss. Simultaneously, we apply butterfly network, propose novel network coding based on...

The azimuth multichannel synthetic aperture radar (AMC-SAR) system makes possible simultaneous high-resolution and wide-swath (HRWS) Earth Observation. motion of moving targets illuminated by the AMC-SAR will not only lead to failure signal reconstruction, resulting in false image, but also defocusing targets. These problems can be effectively addressed estimation target parameters their compensation signal. existing imaging methods focus on eliminating impact radial velocity reconstruction...

The azimuth multi-channel synthetic aperture radar (MC-SAR) systems can simultaneously realize high-resolution and wide-swath (HRWS) earth observations. However, channel phase bias inevitably exists in the practical work of MC-SAR system, which is main factor for “virtual target” SAR images. To accurately estimate bias, a estimation approach based on modified kurtosis maximization (MMK) proposed this paper. By analyzing echo characteristics SAR, constructs objective optimization function MMK...

Quantum secure direct communication (QSDC) is a quantum paradigm that transmits confidential messages directly using states. Measurement-device-independent (MDI) QSDC protocols can eliminate the security loopholes associated with measurement devices. To enhance practicality and performance of MDI-QSDC protocols, we propose one-photon-interference MDI (OPI-QSDC) protocol which transcends need for memory, ideal single-photon sources, or entangled light sources. The our OPI-QSDC has also been...

Quantum secure direct communication (QSDC) guarantees both the security and reliability of information transmission using quantum states. One-photon-interference QSDC (OPI-QSDC) is a technique that enhances distance ensures point-to-point transmission, but it requires complex phase locking technology. This paper proposes mixed-encoding one-photon-interference (MO-QSDC) protocol removes need for Numerical simulations demonstrate MO-QSDC could also beat PLOB bound.

Quantum communication and quantum metrology are widely compelling applications in the field of information science, remote sensing is an intersection both. Despite their differences, there notable commonalities between sensing, as they achieve functionalities through transmission states. Here we propose a novel integrated (QISAC) protocol, which achieves under Heisenberg limit while simultaneously enabling secure entanglements. We have theoretically proven its security against eavesdroppers....

Quantum homomorphic encryption hides quantum information from unauthorized participants while still allowing them to perform calculations on encrypted information. In this paper, we propose a cross scheme based the butterfly network, in which every receiver can receive evaluated state with perfect fidelity. The entangled states between senders of network are preshared, and Bell basis measurements used encrypt plaintext. With both classical channels, evaluation plaintext be completed...

Abstract Quantum secure direct communication (QSDC) guarantees both the security and reliability of information transmission using quantum states. One-photon-interference QSDC (OPI-QSDC) is a technique that enhances distance ensures point-to-point transmission, but it requires complex phase locking technology. This paper proposes mixed-encoding one-photon-interference (MO-QSDC) protocol removes need for Numerical simulations demonstrate MO-QSDC could also beat PLOB bound.

Azimuth multi-channel (AMC) synthetic aperture radar (SAR) systems can achieve high-resolution and wide-swath (HRWS) imaging, widely used in marine monitoring. However, for the moving ship targets irradiated by AMC HRWS SAR system, false defocus will appear images caused their motion. The existing methods behave poorly case of low signal-to-noise ratio channel non-uniformity. To improve quality images, letter proposes a target imaging method based on spectrum energy distribution. Firstly,...

Fault-tolerant error-correction (FTEC) circuit is the foundation for achieving reliable quantum computation and remote communication. However, designing a fault-tolerant error correction scheme with solid ability low overhead remains significant challenge. In this paper, low-overhead proposed communication systems. Firstly, syndrome ancillas are prepared into Bell states to detect errors caused by channel noise. We propose detection approach that reduces propagation path of gate fault depth...