Establishing accurate time standards across the globe is very important. The success of any real-time task depends on maintaining time synchronization in its system. Space technology helps in enabling global dissemination of time. In this paper, we propose a model that uses satellites to transfer the time information extracted from three qubits that are precisely synchronized using quantum synchronization. By applying an external field with wavelength 813.32 nm, we can synchronize the three qubits (each carried in another satellite) to oscillate at the same frequency. We can ideally achieve a precision of 1.6 × 10 15 signals per second, and show the corresponding. Allan deviation curve to analyze the stability of our system for different noise strengths. We introduce the possibility of using quantum synchronization on satellite-carried clocks to distribute accurate time and frequency standards.
Establishing accurate time standards across the globe is very important. The success of any real-time task depends on maintaining time synchronization in its system. Space technology helps in enabling global dissemination of time. In this paper, we propose a model that uses satellites to transfer the time information extracted from three qubits that are precisely synchronized using quantum synchronization. By applying an external field with wavelength 813.32 nm, we can synchronize the three qubits (each carried in another satellite) to oscillate at the same frequency. We can ideally achieve a precision of 1.6 × 10 15 signals per second, and show the corresponding. Allan deviation curve to analyze the stability of our system for different noise strengths. We introduce the possibility of using quantum synchronization on satellite-carried clocks to distribute accurate time and frequency standards.
Establishing accurate time standards across the globe is very important. The success of any real-time task depends on maintaining time synchronization in its system. Space technology helps in enabling global dissemination of time. In this paper, we propose a model that uses satellites to transfer the time information extracted from three qubits that are precisely synchronized using quantum synchronization. By applying an external field with wavelength 813.32 nm, we can synchronize the three qubits (each carried in another satellite) to oscillate at the same frequency. We can ideally achieve a precision of 1.6 × 1015 signals per second, and show the corresponding. Allan deviation curve to analyze the stability of our system for different noise strengths. We introduce the possibility of using quantum synchronization on satellite-carried clocks to distribute accurate time and frequency standards.
Establishing accurate time standards across the globe is very important. The success of any real-time task depends on maintaining time synchronization in its system. Space technology helps in enabling global dissemination of time. In this paper, we propose a model that uses satellites to transfer the time information extracted from three qubits that are precisely synchronized using quantum synchronization. By applying an external field with wavelength 813.32 nm we can synchronize the three qubits (each carried in another satellite) to oscillate at the same frequency. We can ideally achieve a precision of 1.6 × 1015signals per second, and show the corresponding Allan deviation curve to analyze the stability of our system for different noise strengths. We introduce the possibility of using quantum synchronization on satellite-carried clocks to distribute accurate time and frequency standards.
It is essential to establish precise times in future communication networks. Any real-time task's function depends on the system's ability to synchronise time. Time synchronisation is critical in the current communication network and must be maintained to transmit data packets. The functionality of 6G, the Tactile Internet, Time-Sensitive Networking, and ultra-reliable low-latency communications is highly susceptible to time synchronisation. We investigated the idea of employing time synchronisation across different communication network nodes. The current state-of-the-art employs network protocols like Precision-Time Protocol for synchronising clocks across different nodes. These network protocols are not robust and can generate jitters in data transmission. In this paper, we suggested synchronising the time of the node clocks at three different places using quantum technology. Notably, the oscillation frequencies of each qubit (or oscillator) located at these nodes can be synchronised using the quantum synchronisation technique. This set of three oscillators will work as a single clock and will be the master clock of the network. We propose distributing precise time and frequency standards using quantum synchronisation on node clocks. We can synchronise the three qubits (each placed at one node) to oscillate at an identical frequency by applying an external field of a wavelength of 813.32 nm. We analysed our model for different coupling constants and dissipation rates to provide an analysis of the behaviour of the amount of synchronisation in different experimental configurations. The optimal accuracy for our system is 1.6×1015 signals per second. Further, we used the Allan deviation to examine the stability of our system for various noise strengths.
This article develops a protocol to synchronize clocks on board a network of satellites equipped with quantum resources. We show that, in such a constellation, satellites reinforce each other's sync capabilities, forming a common clock that is more stable and precise than its constituents. We envision the resulting network as a master clock able to distribute time across the globe, providing the basis for a future quantum global navigation satellite system or a space-based quantum network. As an example of its capabilities, we show that a constellation of 50 satellites equipped with modest quantum resources, and distributed amongst 5 orbits at an altitude of 500 km, allows the synchronization of clocks spread across the globe at sub-nanosecond precision.
Accurate timekeeping is essential for scientific and technological advancements, particularly in areas of communication, networking, navigation, and high precision measurements. While many methods of time resolution are already established using classical resources, they fail to combine high precision outcomes with large-scale implementations. Additionally, numerous quantum networking architectures using satellite-assisted methods have demonstrated quantum communication on scales exceeding ground-based methods. For these reasons, we propose the use of a time synchronization method by which pairs of highly time-correlated photons are exchanged between clocks on satellites and clocks on Earth, al- lowing users to reconstruct the time offsets between their clocks. This is known as Quantum Clock Synchronization (QCS). We analyze global time synchronization, via numerical simulation, using a network of satellites equipped with quantum resources, such as entangled photon sources (SPDC) and single photon detectors. We find that for satellites in low-earth orbits, a configuration of 50 evenly-space satellites provides constant visibility and sub-nanosecond time synchronization to any location on Earth. Due to practical constraints, clocks available for use on satellites are often of lesser quality than those available for ground use. However, by allowing the satellites in our network to synchronize among themselves, we overcome this limitation, forming a highly precise “master clock” capable of global, high precision time synchronization. We then examine the amount of quantum security provided by polarization-entangled photon sources as a potential way to protect an experimental implementation of QCS from attacks such as signal spoofing. To do this, we identify regions on Earth where Bell violations between exchanged entangled photons can ensure quantum security at various confidence vii levels. Combined with similar insights gained from determining the network scale of our QCS protocol at the single-link level, we demonstrate the potential for highly precise, global, and potentially quantum-secure clock synchronization. Finally, we modify our QCS protocol to support frequency, or tick-rate, offsets in addition to constant time offsets. We motivate this by presenting some relativistic effects that can introduce frequency differences between clocks in space and on Earth. Provided that relative velocities between clocks are corrected for, we identify constant and variable clock defects through numerical simulations.
Abstract This article develops a protocol to synchronize clocks on board a network of satellites equipped with quantum resources. We show that, in such a constellation, satellites reinforce each other's sync capabilities, forming a common clock that is more stable and precise than its constituents. We envision the resulting network as a master clock able to distribute time across the globe, providing the basis for a future quantum global navigation satellite system or a space-based quantum network. As an example of its capabilities, we show that a constellation of 50 satellites equipped with modest quantum resources, and distributed amongst 5 orbits at an altitude of 500 km, allows the synchronization of clocks spread across the globe at sub-nanosecond precision.